报 告 人：Zhongwei Guan， Professor（官忠伟，教授）
Novel lightweight composites increasingly find their applications in aerospace, automotive, marine and construction industry, due to their superior properties such as low weight to strength ratio, high energy absorption, flexible stacking sequence. In this talk, the following lightweight composite structures will be covered, i.e. (1) fibre metal laminates (FMLs), (2) PVC foam based sandwich structures, (3) corrugated cores, (4) SLM lattices, (5) egg box, (6) carbon fibre lattices and (7) high temperature TP prepreg.
FMLs are multi-layered materials consisting of interleaved arrangements of metal and fibre-reinforced composites. They have a good blast/impact resistance. But their performance will differ, depending on the precise materials used, the ways in which they are interleaved, and the thickness of the various materials, orientation of the fibre, resin used, etc. FMLs are currently used in aerospace industry. Next generation of super-jumbo and super-sonic aircraft will require FMLs to have resistance to high temperature, fatigue and impact.
Novel lightweight PVC foam based sandwich structures are made from thin-skins and core with embedded composite tubes. The skin materials are usually made from high strength alloys, glass or carbon fibre reinforced composites, whilst the core is made from PVC foam with embedded composite or metal tubes. Such sandwich structures maximise compression resistance offered by material as well as restraints to composite tubes from the foam. Throughout optimised design on blast and impact resistance, this type of sandwich structures can be produced with the optimised energy absorption to weight ratio. The main advantages of such sandwich structures are: extremely light, superior energy absorption, low cost, high mobile ability, as well as variable combinations between the core and skins.