Peridynamic failure analysis of fiber-reinforced composites
报告题目: Peridynamic failure analysis of fiber-reinforced composites
报告人简介：Pizhong Qiao, Ph.D., P.E., SECB, F.ASCE, F.EMI
Professor, Department of Civil & Environmental Engineering
Washington State University, Sloan 117, Pullman, WA 99164-2910
Phone: 509-335-5183; Fax: 509-335-7632; E-mail: firstname.lastname@example.org
A systematic pull-out simulation scheme in the formwork of two dimensional (2D) axisymmetric domain using peridynamics (PD) is presented, and its application for failure analysis of fiber-reinforced composites is demonstrated. An axisymmetric ordinary state-based peridynamic model is used to model the pull-out deformation just like the axisymmetric stress element in the finite element method (FEM). A failure criterion based on the bond energy density is adopted to predict the interfacial debonding, while a new PD contact model in the 2D axisymmetric domain is proposed to simulate the friction sliding during the pull-out process. The PD pull-out simulation scheme based on the respective 2D axisymmetric model, interfacial failure criterion and contact model is quantitatively validated in comparisons with either the FEM or analytical solutions. The whole process of the pull-out test is simulated using the proposed PD scheme, and the influences of both the interfacial fracture toughness and friction coefficient on the bond-slip behavior are investigated. The developed PD pull-out modeling scheme is capable of effectively simulating the pull-out tests and predicting the bond-slip behavior and being applied in failure modeling of fiber-reinforced composites.
Dr. Pizhong Qiao, Professor of Civil and Environmental Engineering, Washington State University (WSU), received his Ph.D. in Civil Engineering (Advanced Materials, Solid Mechanics and Structures) from West Virginia University (WVU) in 1997. Before joining WSU, Dr. Qiao was Assistant/Associate Professor of Civil Engineering at the University of Akron, Ohio from 1999 to 2006 and Research Assistant Professor of Civil and Environmental Engineering at West Virginia University from 1997 to 1999. He was named a Fellow of the American Society of Civil Engineers (ASCE) (April 2007) in recognition of “his significant contributions to civil engineering research, application, and teaching that have advanced the state-of-the-art in theory and practice in the composites area”. Due to his significant contributions to civil engineering research, particularly in structural composites and mechanics and his commitment and participation within the Engineering Mechanics Institute (EMI), was named (May 2017) an EMI fellow of the ASCE.
He has also conducted research and guided graduate students in the department of Engineering Mechanics at Shanghai Jiao Tong University, primarily in the areas of peridynamics, stability and nonlinear analysis of thin-walled composite structures, and smart composites and their application in structural health monitoring.