工程可靠性与随机力学国际联合研究中心

2025年第12期（总第104期）学术报告

工程力学研究中心第58期学术报告

文远讲坛326期

报告主题

TOPIC

随机无序材料的非局部连续介质建模

Peridynamic modelling of randomly disordered materials

报告人

SPEAKER

Prof. Michael Zaiser

德国埃尔朗根-纽伦堡大学

报告时间

TIME

2025年9月29日（周一）下午16:00-17:00

报告地点

VENUE

同济大学土木大楼 A305

主持人

CHAIR

陈建兵教授、任晓丹教授

报告摘要

Abstract

Microstructural randomness and disorder are ubiquitous features of semi-brittle materials. We discuss how such features can be modelled, short of fully resolving the disordered microstructure, by introducing spatially correlated random properties into a Peridynamics framework. We demonstrate that the ensuing model is discretization-invariant in the limit of large m (small spacing of collocation points), and that it is amenable to adaptive discretization. We use the model to investigate the superposition of fracture mechanical and statistical size effects in highly disordered materials, revisiting Bazant's classical scaling law in the context of a model that accounts for internal length scales and spatial fluctuations in local material properties.

报告人简介

Speaker Bio

Prof. Dr. Michael Zaiser is currently the head of Institute of Materials Simulation in Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Germany. He got his Ph.D. in theoretical physics at the Max-Planck-Institut für Metallforschung (MPI-MF) in Stuttgart, Germany. Before he came back to Germany, he was a professor and deputy head in the School of Engineering at the University of Edinburgh. His main research fields including dislocation theory, microstructures-based plasticity modelling, microstructure properties and design of metamaterials, deformation and failure of materials with amorphous or disordered microstructures, and data-driven approaches to materials design and property prediction. He has published more than 150 articles in peer-reviewed journals, including 2 in Science, 1 in Nature Physics, 1 in Nature Reviews Physics, 3 in Nature Communications and 6 in Physical Review Letters.