材料科学
劈理(地质)
空隙(复合材料)
脆性断裂
开裂
脆性
断裂力学
复合材料
剪切(地质)
断裂韧性
冶金
断裂(地质)
出处
期刊:Elsevier eBooks
[Elsevier]
日期:2007-01-01
卷期号:: 119-II
被引量:1
标识
DOI:10.1016/b978-008044478-9/50008-9
摘要
This chapter focuses on brittle fractures in metallic metals. A brittle fracture is any fracture that occurs by the rapid and unstable extension of a crack. In metals, crack growth can occur by one of the three micro-mechanisms: cleavage, void growth, and shear. Cleavage, which occurs in steels at low temperatures, and in some other metals, involves crack growth by the separation of atomic planes. It is usually initiated by cracking in a brittle microstructural feature such as a precipitate or inclusion. The chapter demonstrates that the TCD can be applied to predict fracture in metals in cases where constrained yielding occurs. When behavior resembles linear elastic fracture mechanics (LEFM), then notches and cracks can validly be studied using the TCD. The chapter also shows that the use of a material-dependant distance parameter is an essential ingredient of any theoretical model of fracture.
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