Sammy Hassan, Ph.D. - Associate - Materials and Corrosion Engineering

Academic Credentials

Ph.D., Engineering Sciences, Harvard University, 2024

Dr. Hassan specializes in fracture mechanics, continuum mechanics, finite element analysis, and materials characterization and design. He has expertise analyzing failure in consumer electronics applications through numerical and analytical modeling. Dr. Hassan also has extensive experience in developing and applying experimental methods to characterize the mechanical behavior of materials.

Prior to joining Exponent, Dr. Hassan completed his postdoctoral training and doctoral work at Harvard University, where he applied fracture mechanics to both linear and non-linear systems. During his time at Harvard, he worked on a three-year-long research collaboration with TSMC to analyze fracture in semiconductor devices and develop methods for characterizing the mechanical behavior of thin films. Within that collaboration, he investigated numerous failure problems in semiconductor devices and provided design strategies to avoid fracture. Earlier in his doctoral work. Dr. Hassan analyzed nonlinear fracture in polymers through a combination of experimental analysis and numerical analysis.

Hassan, S., Wu, J.L., Lan, J., Tang, S., He, J., Vlassak, J.J. and Suo, Z., 2024. Cracking in semiconductor devices — effect of plasticity under triaxial constraint. Journal of the Mechanics and Physics of Solids, p.105856.
Nian, G., Lin, Y.S., Yang, J.M., Hassan, S., Wu, J.L., Tang, S., He, J., Vlassak, J.J. and Suo, Z., 2024. Initiation and arrest of cracks from corners in multi-chip semiconductor devices. Journal of the Mechanics and Physics of Solids, 191, p.105755.
Hassan, S.*, Steck, J.* and Suo, Z., 2023. ELASTIC FIELDS AT CORNERS OF HIGHLY STRETCHABLE MATERIALS ARE CONCENTRATED BUT BOUNDED. Rubber Chemistry and Technology, 96(4), pp.478-488
Steck, J.*, Hassan, S.* and Suo, Z., 2023. Fracture initiated from corners in brittle soft materials. Journal of the Mechanics and Physics of Solids, 170, p.105115.
Zhang, G., Kim, J., Hassan, S. and Suo, Z., 2022. Self-assembled nanocomposites of high water content and load-bearing capacity. Proceedings of the National Academy of Sciences, 119(32), p.e2203962119.
Hassan, S. and Kim, J., 2022. Polyacrylamide hydrogels. IV. Near-perfect elasticity and rate-dependent toughness. Journal of the Mechanics and Physics of Solids, 158, p.104675.
Lavoie, S.R*., Hassan, S.*, Kim, J., Yin, T. and Suo, Z., 2021. Toughness of a composite in which sliding between fibers and matrix is rate-sensitive. Extreme Mechanics Letters, 46, p.101317.
Steck, J., Kim, J., Yang, J., Hassan, S. and Suo, Z., 2020. Topological adhesion. I. Rapid and strong topohesives. Extreme Mechanics Letters, 39, p.100803.

Sammy Hassan

Publications

Prior Experiences