Enhanced Mechanism of Fracture Toughness in Cannon Bone

摘要：

　　As a typical biological material,bone possesses high fracture strength and fracture toughness,which are closely related to its exquisite microstructure.SEM observation of a cannon bone shows that the bone is a kind of layered bioceramic composite consisting of hydroxyapatite sheets and collagen matrix.The hydroxyapatite sheets are of long and thin shape,distributing in parallel.The fracture toughness of the bone is analyzed with the representative model of the hydroxyapatite sheets and the concept of maximum pullout energy.It is shown that the lathy shape as well as the parallel distribution of the hydroxyapatite sheets increases the pullout energy and endows the bone with high fracture toughness.

关键词： Cannon bone Hydroxyapatite sheets Pullout energy Fracture toughness

作者: B.Chen X.Peng S.Sun

作者单位: Department of Engineering Mechanics,College of Resources and Environmental Science,Chongqing University,Chongqing 400044,China

会议类型: 国际会议

会议名称: The Fifth China International Conference on High-Performance Ceramics (第五届先进陶瓷国际研讨会(CICC-5))

会议地点: 长沙

会议语种:英文

页码: 1651-1653

在线出版日期: 2007-05-10（万方平台首次上网日期，不代表论文的发表时间）