The high fatigue properties were found to be related with higher crack closure stress, rough fracture surface and tortuousity of crack path.
较高的疲劳性能与裂纹尖端闭合应力、断口表面粗糙度以及裂纹扩展路径弯折程度有关。
The strain energy release rate of the crack propagation was calculated by using virtual crack closure technique, and fatigue life was forecasted.
采用虚拟裂纹闭合技术计算裂纹扩展的应变能释放率，并对裂纹扩展寿命进行计算。
The results turn out to be that the short cracks exhibit severe crack deflection and week crack closure effect.
试验和分析结果表明，短裂纹扩展的偏折强烈，裂纹闭合效应较小。
The simulating results have indicated that: the crack closure effect is obviously influenced by the fatigue crack length.
在建立裂纹扩展模型的时候，要考虑到裂纹长度对裂纹闭合效应的影响。
The fatigue crack closure and fatigue crack growth rate in the high strain region of SCT specimen are studied.
本文研究了SCT试样高应变区的疲劳裂纹闭合效应和疲劳裂纹扩展速率。
The theoretical analysis indicated that the crack closure effect was mainly responsible for the change of crack growth retardation in corrosion fatigue.
分析表明，塑性诱发裂纹闭合在腐蚀条件下的变化是造成超载后裂纹扩展规律变化的主要原因之一。
On the base of large experimental data set, the influence of effective pressure on rock velocities is analyzed with regression method and the theory of crack closure.
根据大量的实验资料，本文分析了砂岩样品的纵横波速度和有效压力的关系，对实验结果进行了回归分析，并用裂隙闭合理论进行了解释。
The short cracks deflect more severe in coarse grain structure than in fine grain one, result in roughness induced crack closure effect, therefore exhibit slow crack growth rate.
粗晶组织比细晶组织的裂纹偏折更大，粗糙度诱发闭合效应更强，因而裂纹扩展较幔。
The crack closure is dynamically measured by means of interferometric strain-displacement gauge(ISDG).
用激光干涉应变-位移测量仪（ISDG）进行了裂纹闭合点的高精度动态测量。
The typical quantitative models on the crack closure are introduced and commented as well.
此外，还就疲劳裂纹闭合现象的几种有代表性的定量模型做了介绍和评论。
The overload effects were controlled by various factors such as crack blunting, residual compressive stress ahead of the crack tip and crack closure induced by wake zone plasticity.
过载效应是裂尖钝化、裂尖附近残余压应力和裂尖尾部塑性诱导闭合等共同作用的结果。
On the other hand, the stronger short crack effect is exhibited, which is attributed the dependent mentality of closure effect on crack wake.
同时，显露出强的短裂纹效应，系因裂纹闭合效应的尾迹依赖性。
Crack closure of base metal is caused by the residual plastic plastic deformation remaining in the wake of an advancing crack tip and is not as significant as in welded specimen.
而在管线钢基材中裂纹闭合现象较小，闭合原因是裂纹尖端尾部的残余塑性变形。
Fatigue crack propagation in a compressive residual stress field can be characterized with the closure effect.
疲劳裂纹在残余压应力场中的扩展可借助于裂纹闭合力来描述。
It turns out that crack closure is the main reason for retardation, and crack tip blunting, crack deflection and strain-induced martensite would reinforce it.
室温蠕变对裂纹扩展产生延滞的原因主要是裂纹闭合，同时裂尖钝化、裂纹偏折及形变诱发马氏体的形成也会起到一定的作用。
Compressive residual stress increases the crack closure effect at the notch and may lead to a non-propagating crack.
残余压应力使缺口处裂纹闭合力增大甚至可出现非扩展裂纹。
Having excluded the effect of welding residual tresses on crack closure, fatigue crack growth rates of the welded join...
在排除焊接残余应力导致的裂纹闭合效应后，焊缝及热影响区疲劳裂纹扩展速率与基材相当。
In this model, the plastic zone induced by the overload is affected by the three-dimensional constraints, and it leads to significant influence on the crack closure and growth rate.
在此模型中，裂尖的三维约束状态显著影响超载塑性区，从而显著影响裂纹的闭合和扩展速率。
Compressive residual stress increases the crack closure effect at the notch and may lead to a non-pr...
残余压应力使缺口处裂纹闭合力增大甚至可出现非扩展裂纹。
The main causes of bottom flat crack are analyzed, mainly including radial force generated by closure strands stretching in middle span , non-structural elements and construction effects , etc.
分析了导致底板崩裂的主要原因，主要包括跨中合龙束张拉时产生的径向力作用、非预应力钢筋构造因素及施工影响等；
The main causes of bottom flat crack are analyzed, mainly including radial force generated by closure strands stretching in middle span , non-structural elements and construction effects , etc.
分析了导致底板崩裂的主要原因，主要包括跨中合龙束张拉时产生的径向力作用、非预应力钢筋构造因素及施工影响等；
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