Imperial College London

John P. Dear MA PhD CEng FIMechE CPhys FInstP

Faculty of EngineeringDepartment of Mechanical Engineering

Professor of Mechanical Engineering



+44 (0)20 7594 7086j.dear Website




520City and Guilds BuildingSouth Kensington Campus





John has been an academic for 29 years in the Mechanics of Materials Division of the Department of Mechanical Engineering and is a Professor of Mechanical Engineering.

Prior to joining Imperial in 1988, John was an SERC Research Fellow at the Cavendish Laboratory, Cambridge University where he did his first degree and PhD.

John has been successful in obtaining research grants from the UK and US Government (EPSRC, ONR, MRC & DTI/TSB), European Commission, UK and overseas companies. He is Executive Co-Director for the two AVIC Centres at Imperial College London.  His research expertise is structural integrity of materials including manufacturing and micro-structural effects. He has published 296 journal and conference papers; contributed to 16 books, supervised 59 PhDs and 19 RAs. Examples include: impact performance of aerospace and automotive components, blast performance of laminated glass facades and composite structures, creep life of materials in power-station plant, water distribution plant and high-strain rate properties of polymers, composites and a wide range of other materials for defence applications and also for medical research.

John is currently Head of the Composites, Adhesives and Soft Solids (CASS) Group (comprising of eight academics):

John is Executive Co-Director for the two AVIC Centres:

John Dear and Hugh MacGillivray organised the "Impact Club Conference on Impact, High Strain Rate and Blast Research Related to Structural Integrity" on Wednesday 25th May 2011 in the Department of Mechanical Engineering at Imperial College. For information on future courses, please click here.

Selected Publications

Journal Articles

Ahn J, He E, Chen L, et al., 2017, The effect of Ar and He shielding gas on fibre laser weld shape and microstructure in AA 2024-T3, Journal of Manufacturing Processes, Vol:29, ISSN:1526-6125, Pages:62-73

Li X, Jiang L, Wang Y, et al., 2017, Correlation between K<sup>+</sup>-Na<sup>+</sup> diffusion coefficient and flexural strength of chemically tempered aluminosilicate glass, Journal of Non-Crystalline Solids, Vol:471, ISSN:0022-3093, Pages:72-81

Tebbutt JA, Vahdati M, Carolan D, et al., 2017, Numerical investigation on an array of Helmholtz resonators for the reduction of micro-pressure waves in modern and future high-speed rail tunnel systems, Journal of Sound and Vibration, Vol:400, ISSN:0022-460X, Pages:606-625

Del Linz P, Liang X, Hooper PA, et al., 2016, An analytical solution for pre-crack behaviour of laminated glass under blast loading, Composite Structures, Vol:144, ISSN:0263-8223, Pages:156-164

Mohagheghian I, Wang Y, Jiang L, et al., 2017, Quasi-static bending and low velocity impact performance of monolithic and laminated glass windows employing chemically strengthened glass, European Journal of Mechanics A - Solids, Vol:63, ISSN:0997-7538, Pages:165-186

Das S, Ji S, El Fakir O, et al., 2013, Melt Conditioned Twin Roll Casting (MC-TRC) of Thin Mg-Alloy Strips for Direct Stamping of Mg Components, Materials Science Forum, Vol:765, ISSN:0255-5476, Pages:170-+

Mohamed M, Lin J, Foster A, et al., 2017, Formability investigation using a new test design for hot stamping processes, International Journal of Materials & Product Technology, Vol:54, ISSN:0268-1900, Pages:3-19

Kaboglu C, Pimenta S, Morris A, et al., 2017, The effect of different types of core material on the flexural behavior of sandwich composites for wind turbine blades, Journal of Thermal Engineering, Vol:3, ISSN:2148-7847, Pages:1102-1109

Jiang L, Wang Y, Mohagheghian I, et al., 2017, Subcritical crack growth and lifetime prediction of chemically strengthened aluminosilicate glass, Materials & Design, Vol:122, ISSN:0264-1275, Pages:128-135

Arora H, Del Linz P, Dear JP, et al., 2017, Damage and deformation in composite sandwich panels exposed to multiple and single explosive blasts, International Journal of Impact Engineering, Vol:104, ISSN:0734-743X, Pages:95-106

Ahn J, Chen L, He E, et al., 2017, Effect of filler metal feed rate and composition on microstructure and mechanical properties of fibre laser welded AA 2024-T3, Journal of Manufacturing Processes, Vol:25, ISSN:1526-6125, Pages:26-36

Ahn J, He E, Chen L, et al., 2017, Prediction and measurement of residual stresses and distortions in fibre laser welded Ti-6Al-4V considering phase transformation, Materials & Design, Vol:115, ISSN:0264-1275, Pages:441-457

Rolfe E, Kelly M, Arora H, et al., 2016, X-ray CT analysis after blast of composite sandwich panels, 2nd International Symposium on Dynamic Response and Failure of Composite Materials, (draf 2016), Vol:167, ISSN:1877-7058, Pages:176-181

Mohagheghian I, Wang Y, Zhou J, et al., 2017, Deformation and damage mechanisms of laminated glass windows subjected to high velocity soft impact, International Journal of Solids and Structures, Vol:109, ISSN:0020-7683, Pages:46-62

Jiang L, Wang Y, Mohagheghian I, et al., 2017, Effect of residual stress on the fracture of chemically strengthened thin aluminosilicate glass, Journal of Materials Science, Vol:52, ISSN:0022-2461, Pages:1405-1415

Jia L, Yu L, Zhang K, et al., 2016, Combined modelling and experimental studies of failure in thick laminates under out-of-plane shear, Composites Part B - Engineering, Vol:105, ISSN:1359-8368, Pages:8-22

Sancho A, Cox MJ, Cartwright T, et al., 2016, Experimental techniques for ductile damage characterisation, 21st European Conference on Fracture, (ecf21), Vol:2, ISSN:2452-3216, Pages:966-973

Ahn J, Chen L, Davies CM, et al., 2016, Parametric optimisation and microstructural analysis on high power Yb-fibre laser welding of Ti-6Al-4V, Optics and Lasers in Engineering, Vol:86, ISSN:0143-8166, Pages:156-171

Cornish A, Smith RA, Dear J, et al., 2016, Monitoring of strain of in-service railway switch rails through field experimentation, Proceedings of the Institution of Mechanical Engineers Part F -Journal of Rail and Rapid Transit, Vol:230, ISSN:0954-4097, Pages:1429-1439

Del Linz P, Wang Y, Hooper PA, et al., 2016, Determining Material Response for Polyvinyl Butyral (PVB) in Blast Loading Situations, Experimental Mechanics, Vol:56, ISSN:0014-4851, Pages:1501-1517

Del Linz P, Hooper PA, Arora H, et al., 2017, Delamination properties of laminated glass windows subject to blast loading, International Journal of Impact Engineering, Vol:105, ISSN:0734-743X, Pages:39-53

Narayanan A, Maharaj C, Kelly M, et al., 2016, Recent Developments in Measuring Creep Strain in High Temperature Plant Components, Strain, Vol:52, ISSN:1475-1305, Pages:467-477

Kelly M, Arora H, Dear JP, et al., 2014, The comparison of various foam polymer types in composite sandwich panels subjected to full scale air blast loading, International Symposium on Dynamic Response and Failure of Composite Materials (draf2014), Vol:88, ISSN:1877-7058, Pages:48-53

Xiong W, Blackman B, Dear JP, et al., 2015, The effect of composite orientation on the mechanical properties of hybrid joints strengthened by surfi-sculpt, Composite Structures, Vol:134, ISSN:0263-8223, Pages:587-592

Kelly M, Arora H, Worley A, et al., 2016, Sandwich Panel Cores for Blast Applications: Materials and Graded Density, Experimental Mechanics, Vol:56, ISSN:0014-4851, Pages:523-544

Del Linz P, Hooper PA, Arora H, et al., 2015, Reaction forces of laminated glass windows subject to blast loads, Composite Structures, Vol:131, ISSN:1879-1085, Pages:193-206

Das S, Barekar N, El Fakir O, et al., 2015, Influence of intensive melt shearing on subsequent hot rolling and the mechanical properties of twin roll cast AZ31 strips (vol 144, pg 54, 2015), Materials Letters, Vol:147, ISSN:0167-577X, Pages:131-131

Das S, Barekar N, El Fakir O, et al., 2015, Influence of intensive melt shearing on subsequent hot rolling and the mechanical properties of twin roll cast AZ31 strips, Materials Letters, Vol:144, ISSN:0167-577X, Pages:54-57

Das S, Barekar NS, El Fakir O, et al., 2014, Effect of melt conditioning on heat treatment and mechanical properties of AZ31 alloy strips produced by twin roll casting, Materials Science and Engineering A - Structural Materials Properties Microstructure and Processing, Vol:620, ISSN:0921-5093, Pages:223-232

El Fakir O, Wang L, Balint D, et al., 2014, Numerical study of the solution heat treatment, forming, and in-die quenching (HFQ) process on AA5754, International Journal of Machine Tools & Manufacture, Vol:87, ISSN:0890-6955, Pages:39-48

Albieri G, Barnes SJ, de Celis Alonso B, et al., 2014, Rapid bidirectional reorganization of cortical microcircuits., Cerebral Cortex, Vol:25, ISSN:1047-3211, Pages:3025-3035

Arora H, Kelly M, Worley A, et al., 2014, Compressive strength after blast of sandwich composite materials, Royal Society of London. Philosophical Transactions A. Mathematical, Physical and Engineering Sciences, Vol:372, ISSN:1364-503X, Pages:20130212-20130212

Hooper PA, Sukhram RAM, Blackman BRK, et al., 2012, On the blast resistance of laminated glass, International Journal of Solids and Structures, Vol:49, ISSN:0020-7683, Pages:899-918

Arora H, Hooper PA, Dear JP, et al., 2011, Dynamic response of full-scale sandwich composite structures subject to air-blast loading, Composites Part A - Applied Science and Manufacturing, Vol:42, ISSN:1359-835X, Pages:1651-1662

Jensen FM, Puri AS, Dear JP, et al., 2011, Investigating the impact of non-linear geometrical effects on wind turbine blades-Part 1: Current status of design and test methods and future challenges in design optimization, Wind Energy, Vol:14, ISSN:1095-4244, Pages:239-254

Maharaj C, Dear JP, Morris A, et al., 2009, A Review of Methods to Estimate Creep Damage in Low-Alloy Steel Power Station Steam Pipes, Strain, Vol:45, ISSN:0039-2103, Pages:316-331

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