Dynamic compressive strength and mechanism of failure of Al-W fiber composite tubes with ordered mesostructure

About the author

Po-Hsun Chiu is a post-doctoral researcher at University of California, San Diego in the Department of Mechanical and Aerospace Engineering. He received his B.S. from National Cheng Kung University in Taiwan and Ph.D. from University of California, San Diego both in Materials Science and Engineering. He has 18 publications including 8 refereed journal articles. He gave presentations in 4 conferences and received American Physical Society- Shock Compression of Condensed Matter travel award in 2013. He has expertise in high pressure, high temperature processing techniques – Hot and Cold Isostatic Pressing and in dynamic testing using Split Hopkinson Pressure Bars, Drop Weights Test, explosively driven Thick-Walled Cylinder test, Explosively Driven Fragmentation Test, and in material characterization techniques using Optical Microscope, Scanning Electron Microscope, and X-ray Diffraction analysis. His research interests focus on processing and deformation mechanisms and fragmentation of composite materials at high strain rate.

About the author

Professor Vecchio completed his undergraduate education in 1983 at Carnegie-Mellon University in Metallurgical Engineering and Materials Science and his Master of Science degree in Metallurgy and Materials Science at Lehigh University in 1985. Professor Vecchio received his Ph.D. in Materials Science and Engineering from Lehigh University in 1988. His Ph.D. research made use of a combination of electron microscopy and fatigue/fracture mechanics. In 1988, Professor Vecchio joined the Department of Applied Mechanics and Engineering Sciences at the University of California at San Diego as an assistant professor, and is now full professor in the Department of Mechanical and Aerospace Engineering at UC San Diego. For ten years he served as the Director of the Electron Optics and Microanalysis Facility for the Jacobs School of Engineering at UCSD. In 2000, Professor Vecchio was the recipient of the Marcus Grossman Young Author Award from ASM-International and elected Fellow of ASM International in 2009. His early research focused on structure-property relations in advanced materials with emphasis on applications in dynamic loading events for both civilian and defense-related fields.

Prof. Vecchio has a strong interest in the use of computational materials science, material informatics, and materials analytics as an accelerated path to new materials development. Professor Vecchio led the creation of the Department of NanoEngineering at UCSD, and in 2007 was named its first Chair. He has lead an aggressive recruiting effort to attract some of the top scientist and engineers to join the Department of NanoEngineering, and has spearheaded the formation of its graduate and undergraduate education programs.

About the author

Vitali F. Nesterenko is a Distinguished Professor and Chair of the Department of Mechanical and Aerospace Engineering, University of California, San Diego. He received his Doctor in Physics and Mathematics in 1989 from Russian Academy of Sciences. He joined UCSD in 1994 as visiting Research Scientist and in 1996 as faculty. Professor Nesterenko’s research interests include strongly nonlinear wave dynamics of low dimensional metamaterials (particulate and discrete systems with strongly nonlinear interaction).

He pioneered the concept of “sonic vacuum” and theoretically and experimentally discovered a new strongly nonlinear solitary wave. His research interests also include micromechanics of powder deformation under dynamic and quasi-static loading; shear instability and fragmentation of heterogeneous materials in dynamic conditions; shear induced chemical reactions in condensed materials; shock/blast mitigation using soft heterogeneous materials; mechanics of densification and sintering of pressure assisted advanced ceramics and alloys.

He and his co-authors successfully processed and tested high-gradient heterogeneous material based on Ti alloy for ballistic applications, developed high pressure processing method for bulk magnesium diboride and solenoids with critical current suitable for size scaling and complex shapes. Recently reactive materials based on Al-W system were successfully processed and tested. He is the author of 152 papers in archival Journals and of the book “High-Rate Deformation of Heterogeneous Materials” published by Springer Verlag, NY.

He is a Fellow of the American Physical Society elected for “pioneering contribution to strongly nonlinear wave propagation in granular materials, through the discovery of a new solitary wave, and to shock (localized shear) mesomechanics in porous and heterogeneous media”.