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4700 King Abdullah University of Science and Technology
Thuwal 23955-6900
Kingdom of Saudi Arabia

Tamer El Sayed

Assistant Professor, Mechanical Engineering

Ph.D. Mechanical Engineering, California Institute of Technology, Pasadena, USA, 2007

M.S. Mechanical Engineering, California Institute of Technology, Pasadena, USA, 2004

B.S. Mechanical Engineering, California Polytechnic University, Pomona, USA, 2002

Research Interests

The focus of the Computational Solid Mechanics Laboratory (CSML) at KAUST is to develop multi-scale constitutive models for metals and soft materials and to formulate massively parallel computational campaigns to advance predictive science. The following summarizes current research activities:

  • Development of multi-scale constitutive models for nanocrystalline metals. The developed models are capable of capturing distinctive features of nanocrystalline materials, such as the grain size dependence both in classical Hall-Petch form for greater grain sizes (> 10-25nm) and inverse Hall-Petch for finer grain sizes (< 10-25 nm).
  • Development of constitutive models intended to reproduce damage in polymers caused by high strain rate loading. Applications include the design of high-strength composites for impact mitigation.
  • Development of constitutive models intended to reproduce the damage of biological soft tissues induced by bubble cavitation, growth, and coalescence. Potential benefits to industry, the medical and defense communities include: the ability to derive a sound mechanistic and quantitative understanding of traumatic head injury leading to improvements in operative management and post-traumatic care; and the ability to predict the lethality of traumatic injury to the head leading to improvements in helmet and other protective head-gear design and increased survivability during accidents.
  • The developed constitutive models are invaluable parts of predictive simulation methods, which can be used in designing tailor-made materials with superior properties.

Selected Publications

  • T. El Sayed, A. Mota, F. Fraternali, M. Ortiz. "A variational constitutive model for soft biological tissues". Journal of Biomechanics 41(7): 1458-1466
  • T. El Sayed, A. Mota, F. Fraternali, M. Ortiz. "Biomechanics of traumatic brain injury", Comput. Methods Appl. Mech. Engrg. 197: 4692-4701.
  • T. El Sayed, W. Mock, A. Mota, F. Fraternali, M. Ortiz. "Computational assessment of ballistic impact on a high strength structural steel/polyurea composite plate". Comput. Mech. 43(4):525-534
  • E. Gurses, T. El Sayed. "A variational multiscale constitutive model for nanocrystalline materials". Journal of the Mechanics and Physics of Solids. 59(3):732-749.
  • E. Gurses, T. El Sayed. "On tension-compression asymmetry in ultrafine-grained and nanocrystalline metals". Computational Materials Science. 50(2):639-644.