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International CAE Conference Program

 

ZOHAR YOSIBASH

Ben-Gurion University of the Negev, Israel

Zohar Yosibash is a professor at the Mechanical Engineering Department, Ben-Gurion University of the Negev, Beer-Sheva, Israel since 1995 and is the head of the Computational Mechanics and Experimental Biomechanics Laboratories.
He obtained his DSc at Washington University in St. Louis in 1994 and served as a visiting research associate professor at the division of Applied Mathematics at Brown University during 2002-2007. He is a Hans Fisher Senior Fellow at the Institute for Advanced Study of the Technical University of Munich since 2009. He spent short periods as invited research professor at the universities Rennes 1 and Paris 6 in France and Karlsruhe Institute of Technology in Germany. He published over 80 papers in refereed Journals and book chapters on high-order FE methods, singularities and fracture mechanics, nonlinear elasticity, biomechanics of bones and arteries, is the author of a book on singularities published in 2012 by Springer and was the guest editor of three international journals. He is a member of the editorial board of two international journals: one on computational mathematics and one on computational biomechanics. Dr. Yosibash’s main themes of research are applications of FE methods (especially high-order FEMs) to biomechanics and their validation by experimental observation. He is also heavily involved in establishing failure laws in structures in the presence of V-notches and cracks involving theoretical, numerical and experimental viewpoints. Dr. Yosibash is a co-founder and CTO of the company 3F-Fracture,Fatigue,Finite-elements, LTD that provides consulting services to companies in Israel and worldwide on practical problems in the field of solid mechanics and fractures.

Finite element simulations of patient-specific long bones for clinical orthopedic applications

Bone patient-specific simulations aimed to be used in clinical orthopedic practice should demonstrate that they are verified, validated by experiments and obtained automatically in a short time-scale. Such V&V simulations, based on quantitative CT (qCT) scans were recently introduced using high-order finite element methods (p-FEMs), demonstrating an unprecedented prediction capability. We describe the methods used for creating patient specific p-FE models and the large set of in-vitro experiments used to assess their validity.

We shall present two applications of clinical importance of p-FEMs to human femurs:

  1. Predicting pathological fracture risk in patients with bone tumors. The QCT-based p-FE models of 12 fresh-frozen femurs with metastatic tumors were validated by experimental observations.
  2. The analysis of bone fixations by metallic inserts in cases when the femur’s head is removed and replaced during a Total-Hip-Replacement (THR) procedure.