Constraint in the failure assessment diagram approach for fracture assessment
Constraint in the failure assessment diagram approach for fracture assessment
复制标题
用于断裂评估的失效评估图方法的约束
DOI：
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发表时间：
1995
期刊：
影响因子：
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通讯作者：
N. O’Dowd
中科院分区：
文献类型：
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作者：
R. Ainsworth;N. O’Dowd
提出了一种在断裂评定的失效评定图法中考虑约束效应的框架。由于描述约束的参数仍然是开发的主题，因此使用弹性T应力和流体静力Q应力来说明框架。结果表明，可以通过改变失效评定曲线的形状来处理约束效应。在它们最简单的形式中，修改只涉及两个参数：一个是量化取决于几何形状和裂纹大小的结构约束的大小；第二个是量化约束对断裂韧性的影响。
This paper presents a framework for including constraint effects in the failure assessment diagram approach for fracture assessment. As parameters for describing constraint are still the subject of development, the framework is illustrated using both the elastic T-stress and the hydrostatic Q-stress. It is shown that constraint effects can be treated by modifying the shape of the failure assessment curves. In their simplest form, the modifications involve only two parameters: one quantifying the magnitude of structural constraint which depends on geometry and crack size; and the second quantifying the influence of constraint on fracture toughness.