Management Team

Jim Lua

President, Chief Operating Officer

Jim Lua, President of GEM, received his Ph.D in Applied Mechanics from Columbia University in 1989, M.S. in Mechanics and Material Sciences from Rutgers University in 1986, and B.S. in Structural Engineering from Tongji University in 1983. Dr. Lua has over eighteen years experience in conducting and directing research and development of computation fracture and damage mechanics, probabilistic fatigue and life prediction, and mechanics of composites. He has been actively involved in the development of novel computational tools for mesh independent fatigue and fracture analysis, damage evolution associated with discrete matrix cracking and delamination interaction, coupled fire response and structure damage prediction, and residual strength and life prediction of hybrid structure. Prior to founding GEM he served as Senior Principal Scientist at the Anteon Engineering Technology Center. He led the development of several simulation tools for the US Navy and DOD industries including PROGROW for Bell Helicopter to perform probabilistic damage tolerance design of rotorcraft, PULSTR for the Navy Lab to perform the reliability based ship hull design; and TMAT for the Navy Lab to perform a micromechanics-based thermal-mechanical analysis of a woven fabric unit cell.

Vincent Godino

Chief Technical Officer

Vincent Godino, Chief Technical Advisor of GEM, received his M.S. and B.S. in Civil Engineering and Engineering Mechanics from Columbia University in 1963 and 1962, respectively. He has over 35 years experience in finite element analysis of complex beam, plate and shell type structures subject to static and dynamic loading. He was a Vice President at the Anton Engineering Technology Center and the General Manager of the Applied Mechanics Department. He has directed and managed many research and development projects in the areas of structural design and analysis, underwater shock, vibrations, structural acoustics and computational mechanics. Some representative projects Mr. Godino has performed or technically managed include; 1) Development and experimental validation of a finite element model to predict the vibration transmission and radiated noise from propulsion systems; 2) Finite element failure analysis of the composite hull section of the MHC-51 minehunter; 3) Design and analysis of a composite submarine sail subject to hydrodynamic and underwater shock loading; and 4) Dynamic design and analysis of numerous shock and vibration isolation systems including the NSSN combat system module, a hi-speed turbine generator, a towed communications buoy, a navigation gyrocompass, and various electronic equipment.

Technical Advisory Council

Xiaosheng Gao

Dr. Xiaosheng Gao is currently a professor of mechanical engineering at the University of Akron. He received his PhD from Brown University in May 1998 with a major in solid mechanics and two minors: one in materials science and the other in applied mathematics. Before joining the University of Akron, He worked as a postdoctoral research associate at the University of Illinois at Urbana-Champaign. Dr. Gao’s primary research is in the field of mechanics of materials and structures and nonlinear fracture mechanics, with emphasis on numerical modeling and simulation. In recent years he has worked extensively on developing mechanism-based models to simulate material failure process and to predict fracture of structural components. This research bridges the macroscopic continuum mechanics and the microscopic aspects of materials science. The results provide guidelines for safer and more economic design and operation of high-performance of engineering structures. He has authored over 80 archival publications. His research has been presented numerous times at international conferences and workshops and has attracted funding from several federal and state agencies as well as industry. He received the Office of Naval Research Young Investigator award in 2002. He was invited to review research proposals submitted to DoE Office of Science, US Army Research Office, and other federal and state agencies and served as a reviewer for over 30 international journals.

Markus Heinimann

Dr. Heinimann is the Chief Design Engineer for Aerospace Structures in the Product Design and Development Division at the Alcoa Technical Center. He has performed extensive research in fatigue and fracture of advanced materials and structures. He is leading the development, validation and implementation of advanced metallic and hybrid structural concepts for commercial and military aircraft structures. He is responsible for initiating and leading cooperative research programs with major aircraft manufacturers aimed at establishing the performance and cost improvement of advanced metallic and hybrid concepts. In support of the various aerospace structures programs, he has also serves as primary technical contact for various research programs with universities, research laboratories and technology companies aimed at developing the necessary technical understanding, supporting data and analysis capabilities to support the advanced structural concepts. Dr. Heinimann holds B.S., M.S. and Ph.D. degrees in Aeronautics and Astronautics from Purdue University.

Endel Iarve

Dr. Iarve is the Distinguished Research Engineer of Advanced Composite Group at University of Dayton Research Institute. Dr. Iarve has been involved in composites research for the past 20 years. His main direction of research is devoted to methods of strength prediction in composite materials and structures and is directly relevant to the proposed research. His work has been presented in plenary and invited presentations nationally and internationally including the mesh independent discrete crack network model for damage predictions of composite joint structures. It was featured in AFRL Technology Horizons, in December 2006 and June/July 2006 issue of UDRI Research Leader. Dr. Iarve is a member of American Society for Composites and a member of the Fastening and Joining Committee of the American Society of Mechanical Engineers.

Robert Lipton

Dr. Lipton is the Shirley Blue Barton Professor of Mathematics at Louisiana State University (LSU). He has performed extensive research in micromechanics, development of multi-scale numerical methods, and characterization and design optimization of heterogeneous media. Dr. Lipton has been served as PIs for various projects sponsored by AFOSR, NSF, and Boeing in development of multi-scale physics-based models for advanced alloys, multi-scale analysis of field behavior inside heterogeneous media for local and nonlocal continuum theories, micro-peridynamics for fiber reinforced composites, computational design of heterogeneous structural, electric and optimal components, and optimal design of materials, structures and devices. He was a visiting scholar at the Division of Engineering and Applied Sciences at Harvard University Fall 2004-Spring 2005.

Yongming Liu

Dr. Liu is an Assistant Professor at the Dept. of Civil & Environmental Engineering of Clarkson University. He received his B.S. and M.S. in structural engineering from Tongji University in 1999, and his Ph.D. in civil and environmental engineering from Vanderbilt University in 2006. Dr. Liu’s research interests include fatigue and fracture of engineering materials and structures, probabilistic computational mechanics, risk assessment and management, multi-physics damage modeling and structural durability, multi-scale uncertainty quantification and propagation, structural dynamics and earthquake engineering, and stochastic finite element methods. He is the PI and Co-PI of several research projects from governmental agencies (NASA, FAA, and NSF) and private companies — totaling over $2.2 million dollars. Dr. Liu has authored/coauthored over 70 archival journal, reports and conference articles.

Sheldon Wang

Dr. Wang is a Professor and Chair of McCoy School of Engineering at Midwestern State University. He received his Ph.D. in Applied Mechanics from MIT in 1995, and his B.S. from Shanghai Jiao Tong University in 1988. He has performed extensive research in multi-scale and multi-physics modeling, immersed methods, computational mechanics, and instability analysis. He has published a book entitledFundamentals of Fluid-Solid Interactions: Analytical and Computational Approaches in 2008. The wide spectrum of his research accomplishments include the development of implicit matrix-free Krylov-Newton iteration with mixed finite element formulations for immersed continuum, modeling of acoustic fluid-solid interaction systems using mixed finite element formulations, multi-scale and multi-physics modeling using immersed methods, flutter modeling of moving materials, and instability analysis of fluid-solid systems and control of chaos. He is assisting GEM in developing fluid-structure modules to perform multi-physics simulation.

George Weng

Dr. Weng is a Professor II in the Department of Mechanical and Aerospace Engineering at Rutgers University. He is a Fellow of ASME and the American Academy of Mechanics. He has been the Editor of Acta Mechanics since 1985 and was the Technical Editor (Editor-in-Chief) of ASME Journal of Engineering Materials and Technology during 1992-1997. He was the Chairman of ASME Materials Division during 1993-1994. He has performed pioneering research in micromechanics, mechanics of composites, and multi-physics coupling. His current research interests include: i) Nonlinear behavior of ferroelectric crystals and ceramics, ii) Mechanical behavior of nanocrystalline materials, and iii) Mechanical and physical properties of carbon nanotube composites. He has published more than 170 journal papers with an ISI Web of Science Citation of over 3,500 and an h-index of 33.