应机械工程学院国际机械中心邀请，英国利物浦大学复合材料轻量化结构中心官忠伟教授将于2019年10月8日-10月13日来访学院进行科研讲座交流，具体安排如下：

时间：2019年10月30日上午9:00

地点：西二楼机械学院第一会议室

报告摘要：纤维-金属多层板是一种夹层结构，由金属层和纤维增强复合材料层交替而成。这种混合结构有特殊吸引人的材料属性，如高的强度/重量比，有效的成本效益，定制材料属性，很好的抗疲劳、抗冲击和抗腐蚀特性。当前，纤维-金属多层结构吸引了多个飞机制造商，如用在可装载700乘客的A380的上半机身。不过，随着这种复合材料日益增加的应用，也增加了在其受异物冲击和爆炸时对材料特性和破坏模式的影响。这样受受异物冲击的例子就是机身腹部和机翼在高速起飞或着陆时被跑道上的石子和其它废弃物撞击。另外，爆炸也可能由事故或恐怖袭击造成。在该讲座中，先引入纤维-金属多层结构的制造和应用，然后是设计方面的考虑。进一步是使用三维非线性有限元（计算机辅助工程）来模拟纤维-金属多层结构在受异物冲击和爆炸下的响应。这里，模拟工作主要集中在纤维增强复合材料，因为金属层的模拟相对简单些。讲座覆盖了将复合材料的破坏发展融于材料本构关系中来得到纤维-金属多层结构在冲击和爆炸下的响应。模拟结果与相应的试验结果进行了比较，在载荷-位移关系、变形和破坏模式方面得到了很好的验证。被验证后的模型可用于协助纤维-金属多层板的设计，以适用于不同的应用。

 个人简介：官忠伟教授现任英国利物浦大学工程系复合材料轻量化结构中心学科带头人。主要研究方向为轻质复合材料结构在撞击和爆炸等极端载荷条件下的冲击响应，研究包括纤维金属层压板、基于PVC泡沫的三明治和SLM晶格结构、波纹状三明治、高温热塑性预浸料等轻质复合材料结构。目前领导的利物浦大学轻质复合材料和结构中心， 由八名博士生、两名博士后研究员、四名名誉访问研究员、一名项目经理，一名财务主管，主持欧盟重大科研项目无胶复合材料木结构，获得欧盟480万欧元重点资助，领导欧盟6个国家科研团队一起开发无粘合剂的纯木复合结构构件。在国际期刊和会议上发表关于复合材料结构、机械连接和聚合物结构的论文300多篇，其中超过120篇SCI论文，Google学术搜索中的H指数为30，被引用2480多次。 担任《国际冲击工程杂志》编委，及20多个国际会议的学术委员会成员。他获得了IAAM（国际先进材料协会）奖章，国际华人计算力学学会（ICACM）研究员奖，以及JSPS。 担任会议主席主持2014年在剑桥举行的第五届国际计算方法会议。他是《国际冲击工程杂志》的编辑委员会成员，担任20多个国际会议的科学委员会委员，并受邀作了超过15个大会发言和主题演讲。

Title: Aerospace applications of fibre metal laminated composites (FMLs) and the failure analysis of FMLs subjected to high velocity impact and blast loading

Abstract：

A fibre-metal laminate (FML) is a type of sandwich structure consisting of alternating layers of metal and fibre-reinforced composite. The particular interest in using these hybrid materials is linked to their attractive properties, such as high strength/weight ratio, cost-effectiveness, ability to tailor material properties, and good fatigue, impact and corrosion resistance. Currently, FMLs are attracting the interest of a number of aircraft manufacturers. For example, GLARE is being used in the manufacture of the upper fuselage of the A380, an aircraft that is capable of carrying up to 700 passengers. However, with such composite materials being more widely used, an on-going concern is the effect of foreign object impacts and blast on their mechanical properties and failure modes. An example of impact is that of an aircraft underbelly or wing impacted at high velocity during take-off and landing by stones and other small debris from the runway. In addition blast can also occur in aircraft due to accident or terrorist attack. In this talk, manufacturing of FMLs and their applications have been firstly introduced. Then, 3D nonlinear finite element models are presented to show the simulation of projectile impact and blast failure of FMLs, including oblique impact. Here, the effort was concentrated on modelling woven glass fibre reinforced composites, as simulation of aluminium alloys is a relatively simple task. In the work presented here, a damage evolution law is incorporated into the composite constitutive behaviour to obtain the impact and blast response of FML panels. The modelling outputs for projectile impact and blast loadings are validated against the corresponding experimental results, with good correlation in terms of load displacement relationship, deformation and failure modes. The validated computer models can be used to assist design FML components suitable for different applications. Also, the current research work in Lightweight Composite Materials and Structures Group in Liverpool is briefly introduced.

Biography：

Dr Guan is Reader in Lightweight Composite Materials and Structures at the University of Liverpool. He is leading a research group with eight PhD students, four Honorary Visiting Research Fellows, two Postdoctoral Researchers, one project manager and one financial officer focusing on lightweight composite structures subjected to extreme loading conditions such as projectile impact and blast, covering fibre metal laminates, PVC foam based sandwich and SLM lattice structures, corrugated sandwiches, high temperature TP prepreg, etc. He is also leading an EU consortium (€4.8 millions) with 6 countries to develop adhesive free pure wood composite structural members. He has published more than 300 research papers in which 120 SCI papers are in refereed international leading journals, with an h-index of 30 in Google Scholar and citation of 2480. He has recently received IAAM (International Association of Advanced Materials) Medal and the International Chinese Association for Computational Mechanics (ICACM) Fellows Award. He was awarded a Short Term Invitation Research Fellowship by JSPS. He is also a Guest and Lecture Professor of Sichuan University and South China University of Technology and a Visiting Professor of Kyoto University in Japan. Professor Guan chaired the 5th International Conference on Computational Methods held in Cambridge in 2014. He is a member of editorial board of International Journal of Impact Engineering. He also serves as a scientific committee member of more than 20 international conferences and has given more than 15 keynotes, thematic and plenary speeches.