报告题目：COMPUTATIONAL FRACTURE MECHANICS: AN OVERVIEW FROM EARLY EFFORTS TO RECENT ACHIEVEMENTS

报告人：Aleksandar Sedmak 教授 贝尔格莱德大学

邀请人：李 伟

报告时间：2021年4月20日16:00

腾讯会议ID：612673617

报告人简介：是塞尔维亚贝尔格莱德大学机械工程学院教授，同时是贝尔格莱德机械工程学院创新中心负责人。2006-2009，担任贝尔格莱德大学副校长。2003-2006年，担任塞尔维亚科技发展部副部长；1999-2002年，担任美国费城Drexel大学客座教授； Sedmak教授既是欧洲的结构完整性学会副会长（ESIS），弹塑性断裂力学技术委员会（TC1）的成员和TC13联席主席，又是塞尔维亚结构力学和社会寿命（DivK）研究所的负责人。在科学研究领域，Sedmak教授在ISI库期刊上发表了100余篇论文，且在国际会议上发表了200多篇论文，内容涉及断裂力学、疲劳、结构可靠性和寿命，数值方法（有限元法），生物材料等多个领域。培养出50多个博士生，其中包括在罗马尼亚，马其顿和斯洛文尼亚的外国大学就读的学生。他也是罗马尼亚布拉索夫大学的名誉教授。

报告摘要： An overview of the state of the art of computational fracture mechanics is presented, starting from early efforts and going all the way up to recent achievements. Some specific aspects of linear elastic and elastic plastic fracture mechanics problems have been discussed, including the fact that even for a static loading, numerical simulation is not a simple task because of complex geometries, material nonlinearity, and heterogeneity, and especially if crack growth is considered. Therefore, micromechanical modelling of elastic‐plastic crack growth is presented as new and promising approach to overcome some of the shortages of traditional approach. Besides static loading, couple of other important practical problems are tackled, like fatigue crack growth, with remaining life in the focus of investigation, using the empirical laws for crack growth rates. Numerical simulation of fatigue crack growth is inherently complex both because of complex material damage processes and lack of sound theoretical basis to define them. Therefore, combination of theoretical, experimental, and numerical approach is presented here to get reliable and efficient estimation of life under fatigue loading. Special attention is paid to the singularity problem in computational fracture mechanics, including related approximation, interpolation and convergence issues.