Transformation toughening behavior of two edge cracks emanating from a circular hole in zirconia ceramics
Transformation toughening behavior of two edge cracks emanating from a circular hole in zirconia ceramics
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DOI：
10.1007/s10704-004-5678-1
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发表时间：
2005-02
影响因子：
2.5
通讯作者：
J. Luo;Z. Xiao
中科院分区：
文献类型：
--
作者：
J. Luo;Z. Xiao
本文分析了氧化锆增韧陶瓷中圆孔双边缘裂纹的扩展和断裂增韧行为。本研究采用超临界模型来模拟应力诱发相变。两个边缘裂纹等长，对称地位于圆孔的边缘。利用大卫提出的模型对初始相变区进行了评估。M.树桩在此基础上，对超临界氧化锆陶瓷中两边缘裂纹的扩展进行了数值模拟。给出了不同材料参数和几何参数下相变增强断裂韧性的数值算例。
The growth and fracture toughening behavior of two edge cracks emanating from a circular hole in zirconia toughened ceramics is analyzed in this paper. The supercritical model is adopted in this study to simulate the stress-induced phase transformation. The two edge cracks are of equal length and located symmetrically at the edge of the circular hole. The initial transformation zone is assessed with the model proposed by David. M. Stump. Then the growth of the two edge cracks in supercritical zirconia ceramics is simulated with computational methods. Numerical examples on the enhanced fracture toughness due to phase transformation are given under different material and geometry parameters.