哈立法科技大学Andreas Schiffer教授系列报告通知
时间:2017-7-10 16:32:07   阅读:   标签: 航天学院 哈立法科技大学 报告
      报告人简介:牛津大学博士,帝国理工博士后,主要从事材料/结构动力学、水下爆炸动力学等方面的研究。
 
报告一
报告时间:7月12日(周三)下午14:30
报告地点:理学楼417会议室
报告题目:Observations and modelling of the response of submerged structures to underwater blast
摘要:The response of submerged structures to underwater blast is an important consideration in the design of military ships and submarines. The structural motion induced in a blast event gives rise to complex cavitation processes in the fluid which can significantly affect thestructural response. To provide guidelines for blast-resistant design of structural components, numerical and theoretical models are developed and used to predict the blast response of fiber-composite plates, foam-cored sandwich panels and multi-walled structural systems, explicitly accounting for the occurrence of cavitation in the fluid. Predictions are discussed and compared to measurements and observations obtained with a novel transparent shock tube. Finally, the numerical predictions are used to determine optimal structural designs that maximize the resistance to underwater blast.
 
报告二
报告时间:7月13日(周四)上午9:00
报告地点:理学楼417会议室
报告题目:Computational modelling of deformation and failure of randomly disordered heterogeneous solids
摘要:The complex microstructure of any solid materialresults in spatial variations of mechanical and physical properties at certain length scales. This non-uniformity is always partially stochastic in nature and can be statistically quantified through observations of the material microstructure. Strong geometric disorder of microstructural features as well as large discrepancies between material constituent properties can lead to significant statistical scatter in the material response, size effects and instabilities. To what extent can such variations at a certain length-scale affect the material response at larger length-scales, and what macroscopic aspects of the material response can be directly attributed to stochastic variations in mechanical properties? In order to provide partial answers to these intriguing questions, predictions of Stochastic Finite Element models are presented and compared to those obtained with classical deterministic models. Attention is focused on two categories of problems: (i) size-dependence of the through-thickness strength of laminated fibre composites, and (ii) yield surfaces of porous and non-porous solids. Predictions are discussed and compared to experimental evidence.
 
发布:苏胜新 |  审核:马峰 |  来源: 航天学院