Pressurized internal lenticular cracks at healed mica interfaces
Pressurized internal lenticular cracks at healed mica interfaces
复制标题
愈合云母界面处的加压内部透镜状裂纹
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
B. Lawn
中科院分区：
文献类型：
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作者：
K. Wan;R. Horn;S. Courmont;B. Lawn
研究了薄板体界面处内裂纹的平衡状态。考虑了由封闭颗粒产生的中心加载力和固定质量的封闭气体产生的均匀压力相结合而张开的裂纹。断裂力学分析表明，在这些条件下，裂纹是稳定的，但可以通过增加净压力(增加内部压力或减少外部压力)或有效颗粒尺寸来扩展。理论的基本细节被白云母中愈合界面上的透镜状裂纹实验所证实。这些结果与脆性陶瓷系统中的缺陷响应有关，在这些系统中，结构完整性是一个问题。
The equilibrium states of internal penny cracks at interfaces in thin-sheet bodies are investigated. Consideration is given to cracks held open by a center-loading force from an entrapped particle in combination with a uniform pressure from a fixed mass of entrapped gas. A fracture mechanics analysis indicates that under these conditions the cracks are stable, but are amenable to growth from an enhancement in net pressure (increase in internal pressure or decrease in external pressure) or effective particle size. Essential details of the theory are confirmed by experiments on lenticular cracks at healed interfaces in muscovite mica. The results are pertinent to flaw responses in brittle ceramic systems where structural integrity is an issue.