Numerical investigations in structures with imperfect material interfaces and cracks
Numerical investigations in structures with imperfect material interfaces and cracks
复制标题
具有不完美材料界面和裂纹的结构的数值研究
DOI：
10.1002/pamm.201610060
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
A. Ricoeur
中科院分区：
文献类型：
--
作者：
P. Judt;A. Ricoeur
天然纤维增强生物聚合物是许多研究项目的重点，旨在了解和改善生产过程中不同工艺参数下的机械性能。为了提供安全可靠的轻质结构，特别关注的是这种复合材料的损伤和断裂行为。在这里，纤维和基体之间不完美材料界面处的材料行为起着至关重要的作用，一方面控制界面处的非弹性效应，另一方面控制裂纹生长的行为。弹性势的降低与系统中的两个能量消耗过程有关，并且通常沿着裂纹尖端载荷的降低和裂纹扩展方向的转变。本文对具有理想和非理想材料界面的结构进行了裂纹尖端载荷分析，并对不同的试件进行了分析。（© 2016 Wiley‐VCH Verlag GmbH & Co. KGaA，魏因海姆）
Natural fiber reinforced bio‐polymers are in the focus of many research projects to understand and improve the mechanical behavior subjected to different process parameters during production. To provide safe and reliable light weight constructions, special interest is directed towards the damage and fracture behavior of such composite materials. Here, the material's behavior at the imperfect material interface between fiber and matrix plays an essential role and governs inelastic effects at the interfaces on the one hand, and the behavior of growing cracks on the other. The reduction of the elastic potential is related to both energy consuming processes in the system and in general is going along with a reduction of the crack tip loading and a shift of the crack growth direction. In this paper, the crack tip loading analysis in structures with perfect and imperfect material interfaces is presented and applied to different specimens. (© 2016 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)