The Fracture Model of Bio-inspired Keratin Composites

摘要：

A simulation of the failure process at a broken fibril end in keratin matrix composites is presented. The mechanical experiments were carried out using plain, and bio-inspired one-/two-step branched fibrils embedded in wool keratin, and the finite element analysis (FEA) was used to simulate the experiments and calculate the change in strain energy accompanying the observed fracture modes. The strain energy release rate G was then calculated, and found G has great relationship with the fracture modes and cracks length. From the results, it was obvious that the branched fibrils carry more cracks and also need more crack energy than plain fibrils. It can be the reason of the better mechanical properties in bio-inspired fibrils composites. In this way, the measurement and analysis technique may provide a standard method for characterizing fracture modes at broken ends of bio-inspired branched fibrils.

关键词： bio-inspired materials finite element analysis mechanical properties modeling

作者: LIU Yang YIN Rong YU Weidong

作者单位: Textile Materials and Technology Laboratory, Donghua University, Shanghai 201620, P.R.China College of Mechanical Engineering, Donghua University, Shanghai 201620, P.R.China

会议类型: 国际会议

会议名称: The 12th International Wool Research Conference(第十二届国际羊毛会议12th IWRC)

会议地点: 上海

会议语种:英文

页码: 851-854

在线出版日期: 2010-10-19（万方平台首次上网日期，不代表论文的发表时间）