Hierarchical interconnections in the nano-composite material bone: Fibrillar cross-links resist fracture on several length scales
Hierarchical interconnections in the nano-composite material bone: Fibrillar cross-links resist fracture on several length scales
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DOI：
10.1016/j.compscitech.2005.10.005
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发表时间：
2006-07-01
影响因子：
9.1
通讯作者：
Hansma, Paul K.
中科院分区：
文献类型：
--
作者：
Fantner, Georg E.;Rabinovych, Olexandr;Hansma, Paul K.
骨是一种复杂而又非常重要的多组分生物复合材料。在这项工作中，我们专注于从纳米到微观尺度的骨成分的安排，并调查其安排对整个复合材料的断裂机制的影响。我们发现，骨，在纳米尺度上，由矿化的胶原纤维保持在一起的非纤维状的有机基质，这导致在矿化的原纤维之间的分层的主要失效模式。反过来，这些矿化的原纤维形成三种类型的细丝之一，这些细丝跨越骨折骨样品中的微裂纹，可能抵抗这些裂纹的传播。(c)2005爱思唯尔有限公司保留所有权利。
Bone is a complex and very important multi-constituent bio-composite. In this work, we focus on the arrangement of bone constituents from the nanoscopic to the microscopic scale, and investigate the influence of their arrangements on the fracture mechanisms of the whole composite. We find that bone, on the nanoscopic scale, consists of mineralized collagen fibrils held together by a non-fibrillar organic matrix, which results in a primary failure mode of delamination between mineralized fibrils. In turn, these mineralized fibrils form one of three types of filaments that span microcracks in fractured bone samples, possibly resisting the propagation of these cracks. (c) 2005 Elsevier Ltd. All rights reserved.