工程可靠性与随机力学国际联合研究中心

024年第8期（总第82期）学术报告

工程力学研究中心第33期学术报告

文远讲坛289期

报告主题

TOPIC

雪的变形与破坏及板状雪崩的力学

Deformation and Fracture of Snow and the Mechanics of Slab Avalanches

报告人

SPEAKER

Prof. Michael Zaiser

德国埃尔朗根-纽伦堡大学

报告时间

TIME

2024年9月3日（周二）下午14:00-15:00

报告地点

VENUE

同济大学土木大楼 B504

主持人

CHAIR

陈建兵教授

联系人：任宇东

报告内容

Abstract

Despite climate change, snow avalanches remain an important natural hazard in mountainous regions. In particular, so-called snow slab avalanches account for the vast majority of skier-related avalanche incidents. In this presentation, we first discuss the mechanical properties of snow from a fundamental perspective and clarify several common misconceptions. We then take a look at some unusual deformation and failure modes of snow. These include temporal and spatio-temporal  oscillations as well as failure under compressive loads by propagation of anticracks, which is now recognized as the major mechanism controlling release of skier-triggered slab avalanches. We also discuss slab avalanche release from a reliability engineering point of view. Finally, we look into computational aspects of snow avalanche mechanics and demonstrate that materials scientists and geoscientists can learn a lot from the people who make animated films, and vice versa. 

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.