主办：爆炸科学与技术国家重点实验室

      安全与防护协同创新中心

报告题目：Additive manufactured metal microlattice structures for impact performance

报告人：Prof. Peifeng Li

        University of Glasgow

时间：2018年12月11日下午15:00

地点：北京理工大学3号教学楼146会议室

报告人简介：

Dr Peifeng Li is currently a Senior Lecturer in materials and manufacturing at University of Glasgow. Prior to this position, he was an Assistant Professor at Nanyang Technological University, Singapore in 2010–2017, and a postdoctoral researcher at University of Oxford in 2007–2010. He received the BEng in Mechanical Engineering (1999) and the MEng in Materials Processing Engineering (2001), both from Tsinghua University, and the PhD in Materials (2006) from Imperial College London. Dr Li’s research focuses on the process-structure-mechanical property relationship of lightweight materials. One of the recent focuses has been on additive manufacturing (3D printing) of metals. Application includes light alloys (Ti, Al), additive manufactured metals, metal foams, polymeric foams and fibre reinforced polymeric laminates, and ceramics for automotive, aerospace, defence and even biomedical sectors.

报告摘要：

Innovative lightweight materials with improved impact resistance are desired as the core in next generation sandwich structures in aircraft. Microlattice structures with regular topologies and dimensions have been recognised as one of the potential core materials. Recent developments in additive manufacturing such as selective laser melting (SLM) enable the fabrication of metall microlattices with more complicated architectures and better tailorability of properties. In this work, the constitutive behaviour of SLM metals were accurately quantified at quasi-static rates, and then extended to dynamic rates. Finite element modelling was developed and experimentally validated to simulate the dynamic deformation behaviour of SLM microlattices. The combined experimental-numerical effort has allowed for investigating the effect of geometric features of microlattices, and thus enabled the further design and optimisation of topologies of SLM microlattices as the sandwich core for impact performance.