Interfacial cracks analysis of functionally graded materials using Voronoi cell finite element method

Interfacial cracks analysis of functionally graded materials using Voronoi cell finite element method
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使用 Voronoi 单元有限元法分析功能梯度材料的界面裂纹

DOI:
10.1016/j.proeng.2012.01.1152
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发表时间:
2012
期刊:
Procedia Engineering
影响因子:
--
通讯作者:
郭然
郭然
中科院分区:
其他
文献类型:
--
作者:
张广杰;郭然

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采用Voronoi元分析方法研究了含界面裂纹的功能梯度材料的行为。并与不考虑界面裂缝的模型进行了比较。结果表明,梯度功能材料的力学性能受颗粒尺寸、拓扑结构和界面脱骨强度的影响。随着界面的开裂,功能梯度材料的整体刚度逐渐降低,由于基体和增强颗粒不能协同工作,非均质界面处材料性能失配的减少并不明显。结果表明,通过调整颗粒尺寸和提高界面去骨强度可以减小或消除界面裂纹。
The behaviour of a functionally graded material with interface cracks was studied using Voronoi element analysis. A comparison with the mode which does not take the interface cracks into consideration was made. The results show that the mechanical properties of functionally gradient materials are influenced by the particles’ size, topological structure, and interfacial deboning strength. With the interface cracking the overall stiffness of functionally gradient materials is gradually reduced, as a consequence, the reduction of material property mismatch at the heterogeneous interface is not obvious, because the matrix and reinforced particles cannot work together. It is verified that the interface cracks can be reduced or eliminated by the adjustment of the particles’ size and the increasement of the interface deboning strength.
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