Long-Term Reliability of Brittle Materials: The Issue of Crack Arrest

Yann Charles; Francois Hild; Stephane Roux

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Long-Term Reliability of Brittle Materials: The Issue of Crack Arrest

机译：脆性材料的长期可靠性：裂纹抑制问题

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In structures containing brittle materials, residual and/or heterogenous stresses may prevent cracks to propagate up to failure. Consequently, for such structures, crack arrest has to be accounted for and a weakest link hypothesis may not be applicable. A probabilistic crack propagation model is derived to describe instantaneous or delayed arrest phenomena. A time-dependent regime is induced by slow crack growth experienced by ceramics and glasses. A general expression is obtained in which instantaneous up to infinite propagation times can be modeled in a unified way. The results are illustrated on a case sturdy dealing with propagation of cracks in a thin walled tube submitted to a temperature gradient through its thickness. Different types of propagation/arrest regimes can be identified.

机译：在含有脆性材料的结构中，残余应力和/或异质应力可能会阻止裂纹扩展到破坏。因此，对于这种结构，必须考虑裂纹止裂，并且最弱的连接假设可能不适用。推导了概率裂纹扩展模型来描述瞬时或延迟的制动现象。陶瓷和玻璃经历的缓慢裂纹扩展会导致时间依赖性。得到一个通用表达式，其中可以以统一的方式对直至无限传播的瞬时时间进行建模。在一个坚固的案例中说明了结果，该案例处理的是薄壁管中的裂纹在整个厚度范围内承受温度梯度的情况。可以识别不同类型的传播/逮捕制度。

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《Journal of engineering materials and technology》 |2003年第3期|p. 333-340|共8页
作者
Yann Charles; Francois Hild; Stephane Roux;
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作者单位

LMT-Cachan, ENS de Cachan/UMR CNRS/Universite Paris 6, 61 avenue du President Wilson, F-94235 Cachan Cedex, France;

LMT-Cachan, ENS de Cachan/UMR CNRS/Universite Paris 6, 61 avenue du President Wilson, F-94235 Cachan Cedex, France;

Laboratoire "Surface du Verre et Interfaces", UMR CNRS/Saint-Gobain, 39 quai L. Lefranc, F-93303 Aubervilliers Cedex, France;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类工程材料学;
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Long-Term Reliability of Brittle Materials: The Issue of Crack Arrest

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