题目：Isogeometric Stability Analysis of Thin-walled Structures

报告人：郭玉杰 副教授（航空学院航空航天交叉研究院）

时间：2019年10月10日（周四）14：30

地点：明故宫校区A18-209会议室

主办单位：飞行器先进设计技术国防重点学科实验室、科协、航空学院航空学院航空航天交叉研究院

报告内容简介：

    The load carrying capacity of thin-walled structures is known to be significantly influenced by stability aspects such as buckling. A reliable prediction of buckling phenomena requires a robust and accurate analysis tool and consideration of a number of inherent structural imperfections which often dominate the overall non-linear elastic response.

    In this talk, we present buckling and post-buckling problems of thin-walled structures in the framework of isogeometric analysis of isotropic and laminate composite shells considering geometric and thickness imperfections. Our approach exploits the higher order approximation and continuity properties of NURBS modelled shell structures and considers arbitrary openings and cut-outs, as common in industrial applications, on the basis of the finite cell method. The latter proved to be an efficient fictitious domain extension to isogeometric analysis in the context of trimmed NURBS geometries. In particular, the fictitious domain extension allows for a simple and flexible consideration of multiple cut-outs of arbitrary shape from the shell body and at arbitrary location without any re-meshing. Thus, it provides a powerful tool for the systematic study of the buckling tendency of industry relevant models. We will present a number of challenging shell buckling problems to reveal and assess the reliability and accuracy of a fictitious domain extended isogeometric analysis approach of geometric imperfect thin-walled structures.

报告人简介：

    郭玉杰，南京航空航天大学，航空学院，副教授。2016年博士毕业于荷兰代尔夫特理工大学航空结构与计算力学系。主要从事结构计算力学方面的研究，包括等几何分析，板壳稳定性，复合材料结构设计，拓扑优化等。主持国家自然科学基金面上项目等多项课题。近五年在Computer Methods in Applied Mechanics and Engineering, International Journal for Numerical Methods in Engineering等计算力学主流期刊发表论文十余篇，授权发明专利一项。