A-FEM Based Multiscale Method for Virtual Testing of Heterogeneous Materials
Wednesday, January 30, 2019
2:30pm - 3:45pm
320 Lavery Hall – VT Campus
Dr. Qingda Yang
Department of Mechanical and Aerospace Engineering
University of Miami
The use of advanced composites as primary load-support components has been expanding rapidly. But full understanding of the complex progressive damage evolution in such materials has been illusive despite decades of extensive research. In this talk we present the recent advances in high-fidelity simulation based virtual testing (VT) method, which is enabled by our recently developed augmented finite element method (A-FEM). After a brief introduction of the key features of the A-FEM and the multiscale methodology enabled by it, we demonstrate its virtual testing capability through two recent examples. The first is its application in multidirectional laminates. Here we demonstrate and validate that the method can capture the progressive evolution of all major damage modes across material length scales, from their incipient all the way to ultimate (static and fatigue) failure. The second example is its application on an envisioned short fiber reinforced composite. With this example we show that we can predict its progressive damage and failure based on intrinsic properties of constituent materials only (i.e. no empirical parameters from actual testing of physical material). Towards the end of the talk, we shall discuss some necessary future developments of the method for broader applications.
Prof. Qingda Yang is a full professor in the MAE Department at the University of Miami (UM). Dr. Yang’s recent research has focused on developing multi-scale methodologies that can lead to realistic virtual testing and designing of complex heterogeneous materials and structures under general and/or extreme thermal-mechanical loading environments. He is an author/coauthor of 90 journal publications, 4 book chapters, and more than 30 refereed conference proceedings. He was a past Chair of the Composite and Heterogeneous Materials Committee in ASME (2010-2012), and is currently serving an editorial board member for three professional journals. Dr. Yang is an award recipient of several professional and academic societies, including the Eliahu I. Jury Award for excellence in research (2007) and the Prevost’s General Research Award (2008), both from UM, and three Technical Excellence Awards from Rockwell Scientific company (2001; 2004; and 2005).