Adarsh Ayyar, Ph.D.

Dr. Ayyar’s expertise lies in the areas of crashworthiness design, crash simulation using MADYMO, human injury analysis, and the design of occupant restraint systems and airbags. His research interests include stress analysis of homogeneous and composite materials, computational micromechanics modeling of composites, fracture mechanics and advanced finite element analysis.

Prior to joining Exponent, Dr. Ayyar worked for Goodrich Corporation in Phoenix, Arizona for 6 years as a crash simulation engineer. He developed numerical models of inflatable restraint systems and specialized airbags for automotive and aerospace applications. He created novel restraint systems for ejection seats to mitigate injuries to jet fighter pilots during supersonic and subsonic ejections. As part of this work, Dr. Ayyar analyzed the occupant head and neck motions and injury potential using anthropomorphic test devices (ATDs) under a variety of ejection conditions defined by full-scale crash tests, jet sled tests, component tests, and computer simulations.

Ayyar A, Chawla N. Microstructure-based modeling of the influence of particle distribution and fracture on crack growth in particle reinforced composites. Acta Materialia 2007; 55:6064–6073.

Ayyar A. Numerical modeling of damage and crack growth in particle reinforced composites. Ph.D. Dissertation, Arizona State University, 2007.

Ayyar A, Chawla N. Three-dimensional (3D) microstructure-based modeling of crack growth in particle reinforced composites. J. Material Science 2007; 42:9125–9129.

Ayyar A, Chawla N. Microstructure-based modeling of crack growth in particle reinforced composites. Composites Science and Technology 2006; 66(13):1980–1994.

Ayyar A, Laananen DH. Prediction of head and neck injury in transport aircraft seats as a function of occupant size and seat configuration. International Journal of Crashworthiness 2001; 6(2):263–274.

Ayyar A. Investigation of transport aircraft passenger injury using computer simulation. M.S. Thesis, Arizona State University, 2000.

Presentations and Published Abstracts

 
Ayyar A, Chawla N. Three-dimensional (3D) microstructure visualization and finite element modeling of the mechanical behavior of metal matrix composites. Society for the Advancement of Material and Process Engineering (SAMPE), Fall Technical Conference, Dallas, TX, November 2006.

Ayyar A, Chawla N. OOF and beyond: 2D plasticity and 3D microstructure-based modeling. OOF2 Workshop, Center for Theoretical and Computational Materials Science, National Institute of Standards and Technology (NIST), Gaithersburg, MD, August 2006.

Ayyar A, Chawla N. Microstructure-based modeling of crack growth and particle fracture in particle reinforced composites. The Minerals, Metals & Materials society (TMS) Annual Meeting, San Antonio, TX, March 2006.

Ayyar A, Williams JJ, Chawla N. Microstructure-based modeling of crack growth in particle reinforced metal matrix composites. The Minerals, Metals & Materials society (TMS) Annual Meeting, San Francisco, CA, February 2005.

Ayyar A, Laananen DH. Prediction of head and neck injury in transport aircraft seats as a function of occupant size and seat configuration. International Crashworthiness Conference (ICRASH 2000), Royal Aeronautical Society, London, UK, September 2000.

• Graduate Research Assistant, Department of Mechanical and Aerospace Engineering, Arizona State University, 2006–2007
• Senior Engineer, Ejection Seats and Escape Systems, Universal Propulsion Company, Goodrich Corporation, 2000–2005
• Graduate Research Assistant, Department of Mechanical and Aerospace Engineering, Arizona State University, 1998–2000
  
  

• The Minerals, Metals & Materials Society—TMS (member)
• Society of Automotive Engineers—SAE (past member)