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中国材料名师讲坛第115讲——南方科技大学叶林 教授

 

叶林,南方科技大学系统设计与智能制造学院讲席教授, 1987年于北京航空航天大学获得博士学位。1990年获德国亚历山大洪堡基金会研究奖金赴德国凯撒斯劳滕大学复合材料研究所工作。1992年应聘为澳大利亚悉尼大学机械工程系讲师,此后在悉尼大学历任高级讲师、Reader、教授、学院院长、先进材料技术中心主任等

叶林教授是复合材料研究领域公认享有国际声誉和学术地位的学科带头人。叶林教授的研究涉及高性能复合材料力学的诸多领域,包括先进复合材料、智能材料与结构、纳米材料及纳米增强复合材料、结构完整性及耐久性。叶林教授在先进复合材料和功能材料的基础研究和技术开发领域均做出了杰出的贡献,获得了世界范围内的广泛认可。鉴于叶林教授在先进复合材料等领域的杰出贡献和影响力,2004年获得德国洪堡基金会的Friedrich Wilhelm Bessel研究奖。2005年,为表彰叶林教授为澳大利亚航空航天工业复合材料和智能材料领域的杰出贡献,当选澳大利亚工程院(ATSE)院士(FTSE)。

讲座题目

Additive manufacturing of continuous fiber composites using fused filament fabrication

讲座内容:

Fused filament fabrication (FFF) has been extensively studied in recent years because of its capability for manufacturing continuous fiber composite parts. The successful fabrication of high quality continuous fiber composite parts using FFF is secured by completion of a few key mechanisms such as precise deposition of a filament and fusion between a depositing filament and filaments deposited in previous steps, while the fusion is modulated by two key mechanisms, i.e., “intimate contact” and “autohesion”. This presentation summarizes some recent results on additive manufacturing of comtinuous CF/PA composites. A mechanistic model is developed to describe “intimate contact” and “autohesion” processes during the “interlaminar” deposition mode, equipped with parameters such as surface profile of depositing filament, temperature of depositing head, contact duration between filaments, contact pressure between filaments, while the latter is measured by a high precision 3D dynamometer instrumented on the 3D printing platform. It is concluded that a high quality pre-impregnated filament of a precise diameter and high precision deposition of the filament in a defined path with a tailored processing window of deposition temperature, depositing speed, and deposition pressure are the keys for the successful fabrication of high quality continuous fiber composite parts using FFF.