crack closure

In the testing, stress ratio near threshold region was high and crack closure effect was removed.

此方法在测出ΔKth时应力比R已经很高，实际上已不存在裂纹闭合效应的影响。

Crack opening and crack closure can still exist under cyclic compressive loading, whose mechanism differs from that under cyclic thrust loading.

循环压载下仍存在着裂纹张开和裂纹闭合，其机理与拉伸循环下不同。

Numerical simulation of surface crack propagation considering the crack closure effects and the three-dimensional stress constraints

考虑闭合效应和三维应力约束的表面裂纹扩展模拟

Two-dimensional stress intensity factors are solved by BEM with crack closure integrals.

应用边界元法结合裂纹闭合积分求解二 维 裂纹应力强度因子.

Double-K fracture models think that the increasing fracture toughness when the cracks expand stably will increase the cohesion which have the role of crack closure.

双K断裂模型认为裂缝稳定扩展过程断裂韧度的增加会对裂缝产生闭合作用的粘聚力。

The crack opening stress is used to reflect the influence of crack closure. The Paris formula is adopted to simulate the growth of fatigue crack. The effective range of stress intensity factor is taken into the calculation of Paris formula.

通过裂纹张开应力反映裂纹闭合效应，将Paris公式计算疲劳裂纹扩展，将有效应力强度因子范围代入Paris公式中计算，并用高强度钢程序块载荷下疲劳实验结果与计算结果比较。

The traditional theory of propagation of fatigue crack is transformed by the closure phenomenon of crackfatigue.

疲劳裂纹的闭合现象改变了传统的疲劳裂纹扩展理论.

Determination of fatigue crack closure effect by compliance technique and numerical method

用柔度法和数值法确定疲劳裂纹的闭合效应