时间：2023年9月20日（周三）上午9:30~11:30

Time：9:30-11:30 AM, Wednesday, September 20, 2023

地点：西湖大学云谷校区E10-201阶梯教室

Venue: E10-201, Yungu Campus

主持人：西湖大学工学院 讲席教授 Marco Amabili

Host: Chair Professor Marco Amabili, School of Engineering

主讲人/Speaker：

JN Reddy

Professor of Mechanical Engineering

Texas A&M University

报告题目/Title:

Nonlocal Approaches to Modelling of Architected Materials and Fracture in Solids

讲座摘要/Abstract:

The lecture will present the speaker’s recent research on nonlocal approaches for modeling (a) architected materials and structures [1] and (b) graph-based finite element analysis of fracture, called GraFEA [2-6]. The non-local continuum models that account for material and/or structural length scales are discussed to model architected materials and structures (e.g., web-core sandwich panels). GraFEA is built upon the fact that the finite element formulation for any hyperelastic continuum can be written in terms of the forces and strains along the edges of the elements. The major difference between GraFEA and continuum-based approaches to study fracture is that instead of placing the focus on the elements and introducing a displacement discontinuity either between or inside the elements, GraFEA focuses on nodes and the distance between the nodes. Fracture is merely introduced by breakage of the edges (any link between any two distinct nodes). Consequently, it will not suffer from the drawbacks of the existing continuum-based methods in the study of fracture. Use of the GraFEA to study fracture in solids is found to be very robust and accurate in predicting fracture. The approach has the ability to model discrete microcracking with random crack orientations. The usefulness of these approaches will be demonstrated using several nontrivial examples.

讲座联系人/Contact:

科技合作部Sci-tech02@westlake.edu.cn