报告题目：Modelling damage evolution of fibre metal laminates subjected to projectile impact
报告人：官忠伟教授（利物浦大学）
地 点：7号楼大会议室
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土木与交通学院
2016年9月7日
讲座内容：
Fibre metal laminates (FMLs) are multi-layered materials with various stacking arrangements of aluminium alloy layers and fibre-reinforced composite layers. FMLs, such as GLARE (glass fibre/aluminium) and CALL (carbon fibre/aluminium), have attracted 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 on their mechanical properties. 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. Another example of impact is during the manufacturing process or during maintenance, where tools can be dropped on structures at low velocity. In this case, even though the velocity may be low the drop mass of the tool is frequently large. In this talk, 3-D nonlinear finite element models arepresented to simulate perforation failure of FMLs subjected to projectile impact. Here, the modified Hashin’s 3D failure criteria are developed with consideration of rate-dependent effect. In addition, rate-dependent damage evolution laws are implemented in the modelling. Also, the rate-dependent plastic damage and Johnson-Cook failure criteria are used to simulate on-set damage and subsequent damage evolution of aluminium subjected to impact. Reasonably good correlation is obtained between the simulated and experimental results, in terms of load-displacement relationships and the corresponding deformation and failure modes.
主讲人简介：
Dr Guan is an Associate Professor in Centre for Materials and Structures at the University of Liverpool. He is leading a research group with 8 PhD students, 1 postdoc and 2 visiting scholars 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 has published more than 200 papers (over 85 SCI papers with an average impact factor above 2 and 1000 citations) in refereed international journals and conference proceedings in those fields. He is a member of editorial board of International Journal of Impact Engineering.
