# Professor Tony Jefferson

Professor and member of the RESCOM Group

## Overview

**POSITION: **Professor

**GROUP:** Materials for life (M4L)

**QUALIFICATIONS**: BSc, MSc, PhD, CEng, MIStructE

**DEPARTMENT:** Architectural, Civil & Environmental Engineering

**CAREER: 1**0 years with Sir Alexander Gibb and Partners as a civil engineer and numerical analyst; 27 years Lecturer/Senior Lecturer/Reader/Chair: Cardiff School of Engineering.

**RESEARCH INTERESTS: **Numerical modelling of quasi-brittle materials: Application of micro-mechanical solutions to the numerical analysis of cementitious materials: Coupled thermo-hygro-mechanical solutions for concrete: The development and analysis of self-healing cementitious materials.

**INDUSTRIAL SUPPORT:** Support from the finite element company LUSAS for over twenty years.

**CURRENT MAJOR PROJECTS:** PI for EPSRC Programme Grant 'Resilient Materials for Life' RM4L 2017-2022 With Bath, Bradford and Cambridge Universities.

EPSRC funded project 'Engineering Microbial-Induced Carbonate Precipitation via Meso-Scale Simulations'. 2019-2022. With Newcastle (lead) and Bath Universities.

EU ITN 'SMARTNICS'. Led by Ghent University. 2019-2023.

## Biography

## Publications

### 2022

- Jefferson, A. D. and Freeman, B. L. 2022. A crack-opening-dependent numerical model for self-healing cementitious materials. International Journal of Solids and Structures 244-24, article number: 111601. (10.1016/j.ijsolstr.2022.111601)
- Maddalena, R. et al. 2022. Applications and life cycle assessment of shape memory polyethylene terephthalate in concrete for crack closure. Polymers 14(5), article number: 933. (10.3390/polym14050933)

### 2021

- Freeman, B. L. and Jefferson, A. 2021. Numerical simulation of self-healing cementitious materials. In: Kanellopoulos, A. and Norambuena-Contreras, J. eds. Self-Healing Construction Materials: Fundamentals, Monitoring and Large Scale Applications. Springer International Publishing, pp. 151-185., (10.1007/978-3-030-86880-2_6)
- Davies, R., Jefferson, A. and Gardner, D. 2021. Development and testing of vascular networks for self-healing cementitious materials. Journal of Materials in Civil Engineering 33(7) (10.1061/(ASCE)MT.1943-5533.0003802)
- De Nardi, C., Gardner, D., Cazzador, G., Cristofori, D., Ronchin, L., Vavasori, A. and Jefferson, A. 2021. Experimental investigation of a novel formulation of a cyanoacrylate based adhesive for self-healing concrete technologies. Frontiers in Built Environment 7, article number: 660562. (10.3389/fbuil.2021.660562)
- Shields, Y., De Belie, N., Jefferson, A. and Van Tittelboom, K. 2021. A review of vascular networks for self-healing applications. Smart Materials and Structures (10.1088/1361-665X/abf41d)
- Azua-Gonzalez, C. X., Mihai, I. C. and Jefferson, T. 2021. Micromechanics-driven variational method for diffuse-to-localised fracture in quasi-brittle solids. Presented at: 14th WCCM-Ecomas Congress 2020, Virtual, 11-15 January 2021WCCM-ECCOMAS2020, Vol. 100. Scipedia, (10.23967/wccm-eccomas.2020.200)
- Balzano, B., Sweeney, J., Thompson, G., Tuinea-Bobe, C. and Jefferson, A. 2021. Enhanced concrete crack closure with hybrid shape memory polymer tendons. Engineering Structures 226, article number: 111330. (10.1016/j.engstruct.2020.111330)

### 2020

- Selvarajoo, T., Davies, R., Freeman, B. and Jefferson, A. 2020. Mechanical response of a vascular self-healing cementitious material system under varying loading conditions. Construction and Building Materials 254, article number: 119245. (10.1016/j.conbuildmat.2020.119245)
- Freeman, B. L., Bonilla-Villalba, P., Mihai, I., Alnaas, W. and Jefferson, A. 2020. A specialised finite element for simulating self-healing quasi-brittle materials. Advanced Modeling and Simulation in Engineering Sciences 7, article number: 32. (10.1186/s40323-020-00171-4)
- Selvarajoo, T., Davies, R. E., Gardner, D. R., Freeman, B. L. and Jefferson, A. D. 2020. Characterisation of a vascular self-healing cementitious material system: Flow and curing properties. Construction and Building Materials 245, article number: 118332. (10.1016/j.conbuildmat.2020.118332)
- Bower, T. A., Jefferson, A. D. and Cleall, P. J. 2020. A reformulated hardening soil model. Proceedings of the ICE - Engineering and Computational Mechanics 173(1), pp. 11-29. (10.1680/jencm.18.00054)
- De Nardi, C., Gardner, D. and Jefferson, A. D. 2020. Development of 3D printed networks in self-healing concrete. Materials 13(6), article number: 1328. (10.3390/ma13061328)
- Freeman, B. L. and Jefferson, T. 2020. The simulation of transport processes in cementitious materials with embedded healing systems. International Journal for Numerical and Analytical Methods in Geomechanics 44(2), pp. 293-326. (10.1002/nag.3017)

### 2019

- Freeman, B. L., Cleall, P. J. and Jefferson, A. D. 2019. An indicator-based problem reduction scheme for coupled reactive transport models. International Journal for Numerical Methods in Engineering 120(13), pp. 1428-1455. (10.1002/nme.6186)

### 2018

- Jefferson, A., Javierre, E., Freeman, B., Zaoui, A., Koenders, E. and Ferrara, L. 2018. Research progress on numerical models for self‐healing cementitious materials. Advanced Materials Interfaces 5(17), article number: 1701378. (10.1002/admi.201701378)
- De Belie, N. et al. 2018. A review of self-healing concrete for damage management of structures. Advanced Materials Interfaces 5(17), article number: 1800074. (10.1002/admi.201800074)
- Davies, R. et al. 2018. Large scale application of self-healing concrete: design, construction and testing. Frontiers in Materials 5, article number: 51. (10.3389/fmats.2018.00051)
- Teall, O., Pilegis, M., Davies, R., Sweeney, J., Jefferson, T., Lark, R. and Gardner, D. 2018. A shape memory polymer concrete crack closure system activated by electrical current. Smart Materials and Structures 27(7), article number: 75016. (10.1088/1361-665X/aac28a)
- Gardner, D., Lark, R., Jefferson, A. and Davies, R. 2018. A survey on problems encountered in current concrete construction and the potential benefits of self-healing cementitious materials.. Case Studies in Construction Materials 8, pp. 238-247. (10.1016/j.cscm.2018.02.002)
- Ferrara, L. et al. 2018. Experimental characterization of the self-healing capacity of cement based materials and its effects on the material performance: A state of the art report by COST Action SARCOS WG2. Construction and Building Materials 167, pp. 115-142. (10.1016/j.conbuildmat.2018.01.143)
- Broseghini, M., Zanetti, P., Jefferson, A. and Gei, M. 2018. Progressive instability in circular masonry columns. Engineering Structures 157, pp. 96-104. (10.1016/j.engstruct.2017.11.044)
- Jefferson, A. and Davies, R. 2018. A coupled chemo-mechanical damage-healing model for cementitious materials. Presented at: EURO-C 2018: Computational Modelling of Concrete and Concrete Structures, Bad Hofgastein, Austria, 26 February-1 March 2018 Presented at Meshke, G., Pichler, B. and Rots, J. G. eds.Computational Modelling of Concrete Structures: Proceedings of the Conference on Computational Modelling of Concrete and Concrete Structures (EURO-C 2018), February 26 - March 1, 2018, Bad Hofgastein, Austria. London: CRC Press pp. 285-288., (10.1201/9781315182964-35)

### 2017

- Gardner, D., Herbert, D., Jayaprakash, M., Jefferson, A. and Paul, A. 2017. Capillary flow characteristics of an autogenic and autonomic healing agent for self-healing concrete. Journal of Materials in Civil Engineering 29(11), pp. 171-184. (10.1061/(ASCE)MT.1943-5533.0002092)
- Davies, R. and Jefferson, A. 2017. Micromechanical modelling of self-healing cementitious materials. International Journal of Solids and Structures 113-4, pp. 180-191. (10.1016/j.ijsolstr.2017.02.008)
- Mihai, I. C. and Jefferson, A. D. 2017. A micromechanics based constitutive model for fibre reinforced cementitious composites. International Journal of Solids and Structures 110-11, pp. 152-169. (10.1016/j.ijsolstr.2017.01.032)
- Teall, O. et al. 2017. Development of high shrinkage polyethylene terephthalate (PET) shape memory polymer tendons for concrete crack closure. Smart Materials and Structures 26(4), article number: 45006. (10.1088/1361-665X/aa5d66)

### 2016

- Chitez, A. S. and Jefferson, A. D. 2016. A coupled thermo-hygro-chemical model for characterising autogenous healing in ordinary cementitious materials. Cement and Concrete Research 88, pp. 184-197. (10.1016/j.cemconres.2016.07.002)
- Alnaas, W. and Jefferson, A. D. 2016. A robust method for the simulation of quasi-brittle materials. Proceedings of the ICE - Engineering and Computational Mechanics 169(3), pp. 89-108. (10.1680/jencm.15.00019)
- Mihai, I. C., Jefferson, A. D. and Lyons, P. 2016. A plastic-damage constitutive model for the finite element analysis of fibre reinforced concrete. Engineering Fracture Mechanics 159, pp. 35-62. (10.1016/j.engfracmech.2015.12.035)
- Davies, R. et al. 2016. Multi-scale cementitious self-healing systems and their application in concrete structures. Presented at: The 9th International Concrete Conference 2016 - Environment, Efficiency and Economic Challenges for Concrete, Dundee, UK, 4 - 6 July 2016.
- Jefferson, A. D., Mihai, I. C., Tenchev, R., Alnaas, W. F., Cole, G. and Lyons, P. 2016. A plastic-damage-contact constitutive model for concrete with smoothed evolution functions. Computers and Structures 169, pp. 40-56. (10.1016/j.compstruc.2016.02.008)
- Bower, T., Jefferson, A. D., Cleall, P. and Lyons, P. 2016. Modelling soil-fibre composite behaviour using a micromechanical approach. Presented at: 7th European Congress on Computational Methods in Applied Sciences and Engineering, Crete, Greece, 5 - 10 June 2016.
- Davies, R. and Jefferson, A. 2016. Micromechanical modeling of self-healing cementitious materials. Presented at: 9th International Conference on Fracture Mechanics of Concrete and Concrete Structures, Berkeley, CA, USA, 29 May - 1 June 2016.
- Bower, T., Jefferson, A. D., Cleall, P. and Lyons, P. 2016. A micro-mechanics based soil-fibre composite model for use with finite element analysis. Presented at: UK Conference of the Association for Computational Mechanics in Engineering, Cardiff, UK, 31 March - 01 April 2016.
- Alnaas, W. F. and Jefferson, A. D. 2016. A smooth unloading-reloading approach for the nonlinear finite element analysis of quasi-brittle materials. Engineering Fracture Mechanics 152, pp. 105-125. (10.1016/j.engfracmech.2015.04.018)
- Teall, O. et al. 2016. Self-healing concrete full-scale site trials. Presented at: 11th fib International PhD Symposium in Civil Engineering, FIB 2016, The University of Tokyo, Tokyo, Japan, 29-31 August 2016 Presented at Maekawa, K., Kasuga, A. and Yamazaki, J. eds.Proceedings of the 11th fib International PhD Symposium in Civil Engineering, FIB 2016. A.A. Balkema Publishers pp. 639-646.
- Davies, R. and Jefferson, A. 2016. Micromechanical solutions for simulating atuogenous healing in cementitious materials. Presented at: 24th UK Conference of the Association for Computational Mechanics in Engineering, Cardiff, UK, 31 March - 1 April 2016.
- Pilegis, M., Davies, R., Lark, R., Gardner, D. and Jefferson, A. 2016. Challenges of self-healing concrete scale-up and site trials. Presented at: 9th International Conference on Fracture Mechanics of Concrete and Concrete Structures, Berkeley, CA, USA, 29 May -1 June 2016.

### 2015

- Chitez, A. S. and Jefferson, A. D. 2015. Porosity development in a thermo-hygral finite element model for cementitious materials. Cement and Concrete Research 78(Part B), pp. 216-233. (10.1016/j.cemconres.2015.07.010)
- Hazelwood, T., Jefferson, A. D., Lark, R. J. and Gardner, D. R. 2015. Numerical simulation of the long-term behaviour of a self-healing concrete beam vs standard reinforced concrete. Engineering Structures 102, pp. 176-188. (10.1016/j.engstruct.2015.07.056)
- Jefferson, A. D. and Mihai, I. C. 2015. The simulation of crack opening-closing and aggregate interlock behaviour in finite element concrete models. International Journal for Numerical Methods in Engineering 104(1), pp. 48-78. (10.1002/nme.4934)
- Davies, R. E., Jefferson, A., Lark, R. and Gardner, D. 2015. A novel 2D vascular network in cementitious materials. Presented at: fib Symposium 2015, Copenhagen, Denmark, 18-20 May 2015.
- Davies, R. and Jefferson, A. 2015. The simulation of inelastic matrix strains in cementitious materials using micromechanical solutions. Engineering Fracture Mechanics 133 (10.1016/j.engfracmech.2014.10.010)
- Pilegis, M., Teall, O., Hazelwood, T., Jefferson, A. . D., Gardner, D. and Lark, R. 2015. Delayed concrete prestressing with shape memory polymer tendons. Presented at: fib Symposium 2015, Copenhagen, Denmark, 18-20 May 2015.
- Jefferson, A. D. and Chitez, A. 2015. A continuum coupled thermo-hygro mechanical time-dependent model for concrete. Presented at: CONCREEP 10: Mechanics and Physics of Creep, Shrinkage, and Durability of Concrete and Concrete Structures, Vienna, Austria, 21-23 September 2015Proceedings: CONCREEP 10: Mechanics and Physics of Creep, Shrinkage, and Durability of Concrete and Concrete Structures. American Society of Civil Engineers pp. 397-403., (10.1061/9780784479346.047)

### 2014

- Hazelwood, T., Jefferson, A. D., Lark, R. J. and Gardner, D. R. 2014. Long-term stress relaxation behavior of predrawn poly(ethylene terephthalate). Journal of Applied Polymer Science 131(23), article number: 41208. (10.1002/app.41208)
- Gardner, D., Jefferson, A., Hoffman, A. and Lark, R. 2014. Simulation of the capillary flow of an autonomic healing agent in discrete cracks in cementitious materials. Cement and Concrete Research 58, pp. 35-44. (10.1016/j.cemconres.2014.01.005)
- Jefferson, A. D., Tenchev, R., Chitez, A., Mihai, I. C., Garry, C. and Lyons, P. 2014. Finite element crack width computations with a thermo-hygro-mechanical-hydration model for concrete. European Journal of Environmental and Civil Engineering 18(7), pp. 793-813. (10.1080/19648189.2014.896755)
- Mihai, I. C., Jefferson, A. D. and Lyons, P. 2014. Constitutive modelling of fibre reinforced cementitious composites based on micromechanics.. Presented at: EURO-C 2014 Conference, St. Anton am Arlberg; Austria, 24th - 27th March 2014Computational Modelling of Concrete Structures, Vol. 1. Taylor and Francis
- Jefferson, A. D., Mihai, I. C. and Lyons, P. 2014. An approach to modelling smoothed crack closure and aggregate interlock in the finite element analysis of concrete structures. In: Bícanić, N. et al. eds. Computational Modelling of Concrete Structures. CRC Press, pp. 219-223.

### 2013

- Gardner, D. R., Herbert, D. M., Jayaprakash, M. and Jefferson, A. D. 2013. Autonomic self-healing concrete: the capillary flow of cyanoacrylate in discrete cracks. Presented at: 3rd Cement and Concrete Science Conference, Portsmouth, UK, 2 - 3 September 2013.
- Gardner, D. R., Herbert, D. M., Jayaprakash, M. and Jefferson, A. D. 2013. Autonomic self-healing concrete: the capillary flow of cyanoacrylate in discrete cracks. Presented at: 33rd Cement and Concrete Science Conference, Portsmouth, UK, 2-3 September 2013.
- Mihai, I. C. and Jefferson, A. D. 2013. A multi-asperity plastic-contact crack plane model for geomaterials. International Journal for Numerical and Analytical Methods in Geomechanics 37(11), pp. 1492-1507. (10.1002/nag.2094)
- Isaacs, B., Lark, R. J., Jefferson, A. D., Davies, R. E. and Dunn, S. 2013. Crack healing of cementitious materials using shrinkable polymer tendons. Structural Concrete 14(2), pp. 138-147. (10.1002/suco.201200013)
- Mihai, I. C. and Jefferson, A. D. 2013. Smoothed contact in a micromechanical model for cement bound materials. Computers & Structures 118, pp. 115-125. (10.1016/j.compstruc.2012.11.002)
- Gardner, D. R., Herbert, D. M., Jayaprakash, M. and Jefferson, A. D. 2013. Characterisation of healing agents for self-healing cementitious systems. Presented at: 4th International Conference on Self-Healing Materials (ICSHM2013), Ghent, Belgium, 16 - 20 June 2013.

### 2012

- Gardner, D. R., Jefferson, A. D. and Hoffman, A. 2012. Investigation of capillary flow in discrete cracks in cementitious materials. Cement and Concrete Research 42(7), pp. 972-981. (10.1016/j.cemconres.2012.03.017)
- Davies, R. E. and Jefferson, A. D. 2012. The simulation of time dependent behaviour of cement bound materials with a micro-mechanical model. Presented at: Numerical Modeling Strategies for Sustainable Concrete Structures, Aix-en-Provence, 29 May-1 June 2012.

### 2011

- Mihai, I. C. and Jefferson, A. D. 2011. A material model for cementitious composite materials with an exterior point Eshelby microcrack initiation criterion. International Journal of Solids and Structures 48(24), pp. 3312-3325. (10.1016/j.ijsolstr.2011.08.001)
- Dunn, S. C., Jefferson, A. D., Lark, R. J. and Isaacs, B. 2011. Shrinkage behavior of poly(ethylene terephthalate) for a new cementitious–shrinkable polymer material system. Journal of Applied Polymer Science 120(5), pp. 2516-2526. (10.1002/app.33109)
- Gardner, D. R., Hoffman, A. and Jefferson, A. D. 2011. Capillary flow of healing agents in discrete cracks in cementitious materials. Presented at: Third International Conference on Self-Healing Materials, Bath, UK, 27-29 June 2011.
- Lark, R. J., Jefferson, A. D., Gardner, D. R., Isaacs, B. and Dunn, S. 2011. Sustainable self-healing cementitious composites. Presented at: Third International Conference on Self-Healing Materials, Bath, UK, 27-29 June 2011.
- Isaacs, B., Lark, R. J., Jefferson, A. D., Gardner, D. R. and Dunn, S. 2011. Enhancement of self-healing in cementitious materials. Presented at: Third International Conference on Self-Healing Materials, Bath, UK, 27-29 June 2011.
- Jefferson, A. D., Tenchev, R., Cole, G., Lyons, P. and Ou, J. 2011. The simulation of early age cracking with a coupled thermo-hygro-mechanical for concrete model. Presented at: International Conference on Computational Modeling of Fracture and Failure of Materials and Structures (CFRAC 2011), Barcelona, Spain, 6-8 June 2011.

### 2010

- Jefferson, A. D. and Bennett, T. 2010. A model for cementitious composite materials based on micro-mechanical solutions and damage-contact theory. Computers & Structures 88(23-24), pp. 1361-1366. (10.1016/j.compstruc.2008.09.006)
- Joseph, C., Jefferson, A. D., Isaacs, B., Lark, R. J. and Gardner, D. R. 2010. Experimental investigation of adhesive-based self-healing of cementitious materials. Magazine of Concrete Research 62(11), pp. 831-843. (10.1680/macr.2010.62.11.831)
- Adam, J. M., Brencich, A., Hughes, T. G. and Jefferson, A. D. 2010. Micromodelling of eccentrically loaded brickwork:study of masonry wallettes. Engineering Structures 32(5), pp. 1244-1251. (10.1016/j.engstruct.2009.12.050)
- Jefferson, A. D., Joseph, C., Lark, R. J., Isaacs, B., Dunn, S. C. and Weager, B. 2010. A new system for crack closure in cementitious materials using shrinkable polymers. Cement and Concrete Research 40(5), pp. 795-801. (10.1016/j.cemconres.2010.01.004)
- Joseph, C., Gardner, D. R., Jefferson, A. D., Isaacs, B. and Lark, R. J. 2010. Self healing cementitious materials: A review of recent work. Proceedings of the Institution of Civil Engineers Construction Materials 164(1), pp. 29-41. (10.1680/coma.900051)
- Mihai, I. C. and Jefferson, A. D. 2010. The simulation of microcracking and micro-contact in a constitutive model for concrete. Presented at: Proceedings of Euro-C 2003 Computational Modelling of Concrete Structures, Rohrmoos, Austria.
- Jefferson, A. D. 2010. Finite element material models for concrete. Presented at: Proceedings of the 10th International Conference on Computational Structures Technology (CST2010), Valencia, Spain.
- Jefferson, A. D. and Lyons, P. F. 2010. Comparison of approaches from simulating moisture content changes in concrete. Presented at: Proceedings of Euro-C 2010 Computational modelling of concrete structures, Rohrmoos, Austria.

### 2009

- Joseph, C., Gardner, D. R., Jefferson, A. D., Isaacs, B. and Lark, R. J. 2009. Adhesive-based self-healing of cementitious materials. Presented at: 2nd International Conference on Self Healing Materials (ICSHM), Chicago, USA, 28 June - 1 July 2009.
- Dunn, S., Jefferson, A. D., Lark, R. J., Isaacs, B. and Joseph, C. 2009. A numerical model for the shrinkage of polymer elements in active self-healing. Presented at: 2nd InternationalConference on Self Healing Materials, Chicago, July 2009, Chicago, USA.
- Dunn, S. C., Jefferson, A. D. and Lark, R. J. 2009. The numerical simulation of highly shrinkable polymers. Presented at: ACME-UK, National Conference on Computational Mechanics in Engineering, Nottingham, UK.
- Isaacs, B., Joseph, C., Jefferson, A. D., Lark, R. J. and Dunn, S. 2009. Enhancement of self-healing in cementitious materials, post-tensioned with shrinkable polymers. Presented at: 2nd International Conference on Self healing Materials (ICSHM), Chicago, USA.
- Mihai, I. and Jefferson, A. D. 2009. Consitutive model for cemetitious composites based on micrmechanical solutions. Presented at: Association of Computational Mechanics (AMCE), Nottingham, UK.
- Chan, S., Lark, R. J. and Jefferson, A. D. 2009. Influence of rib pattern on SLS behaviour of RC members. Presented at: Concrete Communications Conference, Leeds, UK.
- Jefferson, A. D., Mihai, I. and Lyons, P. 2009. A model for concrete based on micromechanical solutions. Presented at: 10th International Conference on Computational Plasticity, (COMPLASX), Barcelona, Spain.
- Lark, R. J., Jefferson, A. D., Joseph, C., Dunn, S. and Isaacs, B. 2009. Active confinement of cementatious composites with shape memory plastics. Presented at: 2nd International Conference on Self Healing Materials, Chicago, USA.

### 2008

- Gardner, D. R., Jefferson, A. D. and Lark, R. J. 2008. An experimental, numerical and analytical investigation of gas flow characteristics in concrete. Cement and Concrete Research 38(3), pp. 360-367. (10.1016/j.cemconres.2007.10.001)
- Hee, S. and Jefferson, A. D. 2008. A new model for simulating cracks in cementitious composites. Proceedings of the ICE - Engineering and Computational Mechanics 161(1), pp. 3-16. (10.1680/eacm.2008.161.1.3)

### 2007

- Jefferson, A. D. and Bennett, T. 2007. Micro-mechanical damage and rough crack closure in cementitious composite materials. International jJournal for Numerical and Analytical Methods in Geomechanics 31(2), pp. 133-146. (10.1002/nag.551)
- Bennett, T. and Jefferson, A. D. 2007. Experimental test and numerical modelling of hexagonal concrete specimens. Materials and Structures 40(5), pp. 491-505. (10.1617/s11527-006-9157-1)
- Bennett, T. and Jefferson, A. D. 2007. Development of an experimental method to determine the effects of cross-cracking in concrete. Materials and Structures 40(5), pp. 491-505.

### 2006

- Joseph, C. and Jefferson, A. D. 2006. Stochastic regularisation of lattice modelling for the failure of cementitious composites. Presented at: Proceedings of a joint conference of the Association of Computational Mechanics (UK and Irish Society for Scientific and Engineering Computation)., Belfast, UK. pp. 219-222.

### 2005

- Jefferson, A. D. and Bennett, T. 2005. Micro and continuum models for cross-cracking in concrete. Presented at: Proceedings of the 5th Euromech Nonlinear Dynamics Conference, (ENOC2005), Eindhoven, The Netherlands.
- Jefferson, A. D., Bennett, T. and Hee, S. C. 2005. Embedded contact surfaces in constitutive models for cementitious composite materials. Presented at: Proceedings of the 13th conference of Association of Computational Mechanics (13th ACME-UK Conference).

### 2004

- Jefferson, A. D., Barr, B. I. ., Bennett, T. and Hee, S. C. 2004. Three dimensional finite element simulations of fracture tests using the craft concrete model. Computers and Concrete 1(3), pp. 261-284.
- Hee, S. C., Jefferson, A. D. and T., B. 2004. Embedded rough surfaces in a three dimensional constitutive model for concrete. Presented at: Proceedings of 5th International Conference on Fracture of Concrete and Concrete Structures (FRAMCOS V), Vail, USA. pp. 139-146.
- Bennett, T., Jefferson, A. D. and Hee, S. C. 2004. Compression damage in a plastic - damage contact constitutive model for concrete. Presented at: CDROM Proceedings of the European Congress on Computational Methods in Applied Sciences and Engineering, Jyväskylä, Finland.

### 2003

- Jefferson, A. D. 2003. Craft - a plastic-damage-contact model for concrete I. Model theory and thermodynamic considerations. International Journal of Solids and Structures 40(22), pp. 5973-5999. (10.1016/S0020-7683(03)00390-1)
- Jefferson, A. D. 2003. Craft - a plastic-damage-contact model for concrete II. Model implementation with implicit return-mapping algorithm and consistent tangent matrix. International Journal of Solids and Structures 40(22), pp. 6001-6022. (10.1016/S0020-7683(03)00391-3)
- Jefferson, A. D. 2003. Shear contact in a plastic damage constitutive model. Presented at: Proceedings of VII International Conference on Computational Plasticity (COMPLASVII), Barcelona, Spain.
- Jefferson, A. D. 2003. Total-local consistency condition in a plastic-damage model for concrete. Presented at: Proceedings of Euro-C 2003 Computational Modelling of Concrete Structures, St. Johann im Pongau, Austria.

### 2002

- Jefferson, A. D. 2002. Tripartite cohesive crack model. Journal of Engineering Mechanics 128(6), pp. 644-653. (10.1061/(ASCE)0733-9399(2002)128:6(644))
- Jefferson, A. D. 2002. A constitutive model for aggregate interlock on formed crack planes. International Journal for Numerical and Analytical Methods in Geomechanics 26(5), pp. 515-535. (10.1002/nag.210)
- Jefferson, A. D. 2002. Local plastic surfaces for cracking and crushing in concrete. Proceedings of the Institution of Mechanical Engineers Part L Journal of Materials Design and Applications 216(4), pp. 257-266.
- Jefferson, A. D. 2002. Tangent moduli for constitutive models with directional planes of degradation. Presented at: Proceedings 5th World Congress on Computational Mechanics (WCCM V), Vienna, Austria.
- Jefferson, A. D. 2002. Plasticity, damage and contact in concrete crack simulation. Presented at: Proceedings of the 10th Annual Conference of the Association for Computational Mechanics in Engineering (ACME-UK), Swansea, UK.

### 2001

- Karihaloo, B. L. and Jefferson, A. D. 2001. Looking into concrete. Magazine of Concrete Research 53(2), pp. 135-147. (10.1680/macr.2001.53.2.135)
- Jefferson, A. D. 2001. Constitutive model of concrete with local plastic surfaces. Presented at: Proceedings BCA Concrete Communication Conference, Manchester, UK. pp. 387-398.
- Jefferson, A. D. 2001. Thermodynamics of a multi-component crack model. Presented at: Proceedings of IUTAM Symposium on Analytical and Computational Fracture Mechanics of Non-homogeneous Materials, Cardiff, UK Presented at Karihaloo, B. L. ed. Springer pp. 377-386.

### Contracts

Title | People | Sponsor | Value | Duration |
---|---|---|---|---|

Integrity assessment of large concrete dams (IALAD) | Dr AD Jefferson | Commission of European Communities | 36816 | 01/05/2002 - 01/05/2005 |

Shape Memory Chords in Cementitious Composite Material | Dr AD Jefferson, Dr R Lark | Royal Society | 29531 | 01/03/2007 - 28/02/2008 |

To develop and market a state-of-the-art software module for non-linear earthquake analysis of civil engineering structures | Jefferson A | KTP and Finite Element Analysis Ltd | 16894 | 01/12/2014 - 26/03/2015 |

To develop and market new state-of -the-art facilities in the finite element program LUSAS for soil-structure interaction problems | Jefferson A, Cleall PJ | TSB and FINITE ELEMENT ANALYSIS | 269368 | 01/07/2013 - 30/06/2016 |

KTP: A coupled Thermo-Hygro-Mechanical finite element model for concrete structures | Jefferson A, Gardner D | MOMENTA with Finite Element Analysis Ltd | 269644 | 25/03/2010 - 24/03/2013 |

Embedded contact surfaces in constitutive models for cementitious composite materials | Jefferson AD | Engineering and Physical Sciences Research Council | 93157 | 01/04/2003 - 31/03/2005 |

Support for Lusas reader in computational modelling of quasi-brittle materials | Jefferson AD | LUSAS | 15000 | 01/07/2009 - 01/07/2010 |

Finite element simulation of concrete heat hydration | Jefferson AD | Royal Academy of Engineering | 14922 | 05/01/2009 - 05/07/2009 |

Support for Lusas reader in computational modelling of quasi-brittle materials | Jefferson AD | LUSAS | 60000 | 01/07/2008 - 30/06/2011 |

Finite element modelling of structures under earthquake loading | Jefferson AD, Lark RJ | LUSAS-Cardiff KTP | 207228 | 01/12/2011 - 01/12/2014 |

Retrofitting and rehabilitation of reinforced concrete beams using ultra high performance concrete and basalt reinforced concrete overlay | Karihaloo B, Jefferson A, Kulasegaram S | British Council | 32973 | 01/03/2014 - 29/02/2016 |

Materials for life (M4L): Biomimetic multi-scale damage immunity for construction materials | Lark R, Gardner D, Jefferson A, Harbottle M | EPSRC | 1672025 | 01/04/2013 - 31/03/2016 |

Low carbon composites for the construction industry | Lark R, Jefferson AD, Gardner D | Alun Griffiths Contractors | 33000 | 01/10/2010 - 30/09/2013 |

Shape memory polymer,cementitious matrix material system | Lark RJ, Jefferson AD | Institute of Civil Engineers | 12000 | 15/04/2009 - 15/06/2009 |

Shape memory polymer,cementitious matrix material system | Lark RJ, Jefferson AD | Institute of Civil Engineers | 12931 | 15/06/2009 - 15/06/2010 |

Virtual design for microfluidic encapsulation process | Barrow D, Jefferson A, Kerfriden P, Phillips T (MATHS) | Ser Cymru NRN Swansea AEM | 150000 | 01/01/2015 - 30/06/2018 |

Resilient Materials For Life (RM4L) | AD Jefferson, DR Gardner, M Harbottle, IC Mihai, RE Davies, A Paul With Bath, Bradford and Cambridge Universities | EPSRC | 4,837,625 | 03/04/2017- 02/04/2022 |

EU Cost Action SARCOS | AD Jefferson, RE Davies 26 Partner countries Led by Mercedes Sánchez, UCO, Spain | EU | 2016-2021 |

### Supervised Students

Title | Student | Status | Degree | |
---|---|---|---|---|

Coupled Thermo-Hydro-Chemical Modelling of Self healing Processes In Cementitious Materials | CHITEZ Adrianna | Graduate | PhD | |

An Investigation into Flow Properties of Self-Healing Agents In Damaged Zones of Cementitious Materials | HOFFMAN Andrea | Graduate | MPhil | |

Self-healing Cementitious Materials | ISAACS Ben | Graduate | PhD | |

FINITE ELEMENT ANALYSIS OF SOIL-STRUCTURE INTERACTION. | FREEMAN Brubeck Lee | Graduate | PhD | |

Experimental and Numerical Study of the Fracture and Self-healing of Cementitious Materials | JOSEPH Christopher | Graduate | PhD | |

Numerical Investigation into Moisture Transportation in Cementitious Materials for Self-Healing | MA Chuansan | Current | PhD | |

Energy-minimizing multi-crack growth inlinear elastic fracture using the extended finite element method with application to Smart-Cut silicon wafer splitting | SUTULA Danas | Graduate | PhD | |

PRECONDITIONED PARALLEL ITERATIVE SOLUTION METHODS FOR COUPLES FINITE ELEMENTS ANALYSES | OWEN David Huw | Graduate | PhD | |

A MULTI SURFACE PLASTICITY MODEL FOR THE SIMULATION OF FRACTURE IN PARTIALLY SATURATED SOIL | BAXTER Geoffrey | Graduate | PhD | |

Bond And Cracking Of Reinforced Concrete | CHAN Hang Chi Simon | Graduate | PhD | |

Micromechanical Constitutive Models For Cementitious Composite Materials | MIHAI Iulia Carmen | Graduate | PhD | |

TRANSIENT AND DYNAMIC THERMO/HYDRAULIC/ MECHANICAL BEHAVIOUR OF PARTIALLY SATURATED SOIL | WANG Jingran | Graduate | PhD | |

Finite Element Modelling of Concrete at Elevated Temperatures | COTTON John Christian | Graduate | PhD | |

Serviceability Assessments of Masonry Arch Bridges | WU Lufang | Graduate | PhD | |

INTERGRAL WIDENING OF REINFORCED CONCRETE UNDER BRIDGES | HOSSEINI Mahmood | Graduate | PhD | |

Retrofitting Of Reinforced Concrete Beams With CARDIFRC In Hot Climate | EWAZE Mohamed | Graduate | MPhil/PhD | |

CAPILLARY FLOW OF AUTOGENIC AND AUTONOMIC HEALING AGENTS IN DISCRETE CRACKS IN CEMENTITIOUS MATERIALS. | JAYAPRAKASH Monica | Current | PhD | |

HIGH STRENGTH REINFORCED CONCRETE BEAMS UNDER SHEAR | MILLS Nicholas Roy | Graduate | PhD | |

ADAPTIVE MULTISCALE SIMULATION OF DAMAGE IN COMPOSITE STRUCTURES. | BONILLA VILLALBA Pedro | Submitted | PhD | |

LOW CARBON COMPOSITES FOR THE CONSTRUCTION INDUSTRY | DAVIES Robert Elfed | Graduate | PhD | |

Numerical simulation of Cracking using Embedded Surfaces in a Three Dimensional Constitutive Model for Concrete | HEE Siew Chang | Graduate | PhD | |

A Novel Self-Healing memory Polymer-Cementitious System | DUNN Simon | Graduate | PhD | |

SOIL STRUCTURE INTERACTION | BOWER Thomas Ashley | Graduate | PhD | |

Investigation of a Novel Self-Healing Cementitious Comp[osite Material System | HAZELWOOD Tobias | Graduate | PhD | |

Nonlinear Finite Element Analysis of Quasi-Brittle Materials | ALNAAS Waled Farj Jumma | Graduate | PhD | |

Characterisation of self-healing process | SELVARAJOO, Tharmesh | Current | PhD | |

Finite element simulation of micro and macro cracks in quasi-brittle materials | AZUA-GONZALEZ, Carlos | Current | PhD | |

Chemical processes in self-healing cementitious materials | EVANS, Gwilym | Current | PhD | |

Numerical simulation of fibre reinforced composite materials | BAINS, Amrit | Current | PhD |