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A relaxation-based approach to damage modeling

作者: 时间:2019-05-23 点击:[]

日期(月) 日期(日) 19
地址 综合1号实验楼602

时间:2019319日(星期二)14:00

地点:综合1号实验楼602

报告题目:A relaxation-based approach to damage modeling

报告人:Klaus Hackl教授, Ruhr-Universitat Bochum


Abstract:Material models exhibiting softening effects due to, for example, damage and localization, share the problem of leading to ill-posed boundary value problems. It is thus necessary to apply regularization techniques that couple local behavior described, for example, by internal variables at a spatial level. This can be done taking into account higher gradients of the internal variables. In this talk, we present a new approach to damage modeling that does not use common field functions, inclusion of gradients or complex integration techniques but appropriate modifications of the relaxed (condensed) energy. It possesses the same advantages as other methods, but with much less numerical effort. We start with the theoretical derivation and then discuss the numerical treatment. Finally, we present finite element results that prove empirically how the new approach works.

Short bio of Prof. Klaus Hackl

Klaus Hackl,男,1957年生于奥地利维也纳。工学博士,教授。从事材料理论、数值计算和结构力学领域的科研和教学工作。1980年德国卡尔斯鲁厄大学/海德堡大学物理学士毕业,1985年德国海德堡大学数学硕士毕业,1988年获德国亚琛工业大学博士学位,1997年被奥地利格拉茨技术大学授予教授特许任教资格。历任德国亚琛工业大学助理研究员(1985–1989),德国格拉茨技术大学材料强度研究所助理教授(1992–1997)、副教授(1997–1999),1989–1992年在美国特拉华大学数学系荣获德国洪堡基金会佛欧多尔・吕南奖,1999年至今任职于德国鲁尔-波鸿大学材料与力学理论研究所所长。德国德意志研究委员会重大科研项目SFB的首席科学家,德国应用数学和力学学会委员会成员及学会下设微观力学分委会成员。

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