John P. Dear

John P. Dear FREng
Professor John P. Dear FREng
Born
Stourport-on-Severn
OccupationProfessor in Mechanical Engineering
Awards
Academic background
Education
Academic work
Discipline
InstitutionsImperial College London

John P. Dear is a British academic and educator. He is a faculty member and Professor at the Department of Mechanical Engineering of Imperial College London,[1] and a Fellow of the Royal Academy of Engineering.[2]

Early life and education

John Dear attended St John's College, Cambridge where he read Natural Sciences (Physics) as an undergraduate, followed by PhD study at St John's College, supervised by Professor John E. Field OBE FRS on high strain rate properties of materials subject to impact.[3][4]

After his PhD, John Dear was an SERC Research Fellow at the Cavendish Laboratory and Hertha Ayrton Research Fellow at Girton College.[1]

Career and research

John Dear joined the Department of Mechanical Engineering at Imperial College London in April 1988, as the BP Chemicals Lecturer, researching the structural integrity of plastic pipes[5][6] and applying high-speed visualization techniques to fracture processes in composite materials.[7] Since 1989, John has been a Chartered Engineer (UK) (CEng) and a Chartered Physicist (CPhys). In 2002, John was elected a Fellow of the Institution of Mechanical Engineers and a Fellow of the Institute of Physics. In 2006 John was awarded the George Stephenson Medal by the Institution of Mechanical Engineers for best IMechE paper.[6] In 2023, John was elected a Fellow of the Royal Academy of Engineering.[2]

Subsequently, John Dear pioneered and led a group that has developed 3D high-speed speckle strain mapping and other strain visualisation techniques, with related Finite Element damage modelling,[8][9][10] for assessment of the safety of engineering structures. This work, in collaboration with Professor Tony Kinloch FREng FRS, has been applied to impact of composite and laminated glass structures for civil aircraft and aeroengines, for Airbus and Rolls-Royce, as well as explosive blast mitigation research of building façade structures with the Centre for the Protection of National Infrastructure - CPNI. This research was for risk assessment of the terrorist threats to buildings and vehicles.[11] The techniques have also been employed to develop blast resilient composite structures for the US Office of Naval Research.[12] Recently, John Dear's research group has focused on drop-weight impact of thermoplastic composites with associated modelling of damage [13] and subsequent repair of composites.[14]

References

  1. 1 2 "Professor John Dear". Imperial College London.
  2. 1 2 "Professor John Dear FREng". Royal Academy of Engineering.
  3. ↑ Field, John Edwin; Lesser, M. B.; Dear, J. P. (1985). "Studies of two-dimensional liquid-wedge impact and their relevance to liquid-drop impact problems". Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences. 401 (1821): 225–249. Bibcode:1985RSPSA.401..225F. doi:10.1098/rspa.1985.0096.
  4. ↑ Dear, John Philip (1985). The Fluid Mechanics of High-Speed Liquid/Solid Impact. University of Cambridge.
  5. ↑ Dear, John; Williams, Gordon. "A simple method of determining the fracture resistance for rapidly propagating cracks". Journal of Materials Science. doi:10.1007/BF00349060.
  6. 1 2 Dear, J. P.; Mason, N. S. (2006). "The effect of chlorine on polyethylene pipes in water distribution networks". Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications. 220 (3): 97–111. doi:10.1243/14644207JMDA88.
  7. ↑ Blackman, B. R. K.; Dear, J. P.; Kinloch, A. J.; MacGillivray, H.; Wang, Y.; Williams, J. G.; Yayla, P. (1995). "The failure of fibre-composites and adhesively-bonded fibre-composites under high rates of test". Journal of Materials Science. 30 (23): 5885–5900. Bibcode:1995JMatS..30.5885B. doi:10.1007/BF01151502.
  8. ↑ Ding, Yuzhe; Johnson, Michael S.; Liu, Jun; Dear, James; Li, Jiaqi; Liu, Haibao; Kinloch, Anthony J.; Dear, John P. (2025). "Drop-weight Impact of Composite Laminates: Modelling the Effect of a Round-nosed versus a Flat-ended Impactor". Applied Composite Materials. 32 (3): 791–814. Bibcode:2025ApCM...32..791D. doi:10.1007/s10443-025-10315-7.
  9. ↑ Mohagheghian, I.; Wang, Y.; Zhou, J.; Yu, L.; Guo, X.; Yan, Y.; Charalambides, M. N.; Dear, J. P. (2017-03-15). "Deformation and damage mechanisms of laminated glass windows subjected to high velocity soft impact". International Journal of Solids and Structures. 109: 46–62. doi:10.1016/j.ijsolstr.2017.01.006. ISSN 0020-7683.
  10. ↑ Liu, Jun; Liu, Haibao; Kaboglu, Cihan; Kong, Xiangshao; Ding, Yuzhe; Chai, Hui; Blackman, Bamber R. K.; Kinloch, Anthony J.; Dear, John P. (2019-12-01). "The Impact Performance of Woven-Fabric Thermoplastic and Thermoset Composites Subjected to High-Velocity Soft- and Hard-Impact Loading". Applied Composite Materials. 26 (5): 1389–1410. doi:10.1007/s10443-019-09786-2. hdl:10044/1/73176. ISSN 1573-4897.
  11. ↑ Hooper, P.A.; Sukhram, R.A.M.; Blackman, B.R.K.; Dear, J.P. (2012). "On the blast resistance of laminated glass". International Journal of Solids and Structures. 49 (6): 899–918. doi:10.1016/j.ijsolstr.2011.12.008. hdl:10044/1/25145.
  12. ↑ Arora, H.; Hooper, P.A.; Dear, J.P. (2011). "Dynamic response of full-scale sandwich composite structures subject to air-blast loading". Composites Part A: Applied Science and Manufacturing. 42 (11): 1651–1662. doi:10.1016/j.compositesa.2011.07.018.
  13. ↑ Liu, Haibao; Liu, Jun; Ding, Yuzhe; Hall, Zoe E.; Kong, Xiangshao; Zhou, Jin; Blackman, Bamber R. K.; Kinloch, Anthony J.; Dear, John P. (2020). "A three-dimensional elastic-plastic damage model for predicting the impact behaviour of fibre-reinforced polymer-matrix composites". Composites Part B: Engineering. 201 108389. doi:10.1016/j.compositesb.2020.108389. hdl:10044/1/82504.
  14. ↑ Liu, Haibao; Liu, Jun; Hall, Zoe E. C.; Brooks, Richard A.; Crocker, James W. M.; Joesbury, Adam M.; Harper, Lee T.; Blackman, Bamber R. K.; Kinloch, Anthony J.; Dear, John P. (2023). "Modelling the effects of patch-plug configuration on the impact performance of patch-repaired composite laminates". Composites Science and Technology. 233 109917. doi:10.1016/j.compscitech.2023.109917. hdl:10044/1/101996.


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