高ra值是张裂纹形成产生的波，低值是剪切裂纹形成的波。
High ra value is wave generated by tensile cracks and low ra value is wave generated by shear cracks propagation.
当间距减小到一定值时产生剪切裂纹并不断扩展，最终导致断裂破坏。
When the shear band spacing reaches the critical value, shear cracks occur and continuously extend, finally resulting in the fracture failure.
根据损伤变量的变化，采用单元消除法分析了剪切裂纹的扩展，并得到了剪切各个段的金属流动、应力应变以及损伤变量分布。
Crack growth was analyzed by using element eliminating method based on the variation of damage variable. Material flow, strain, stress and damage distribution of different steps was achieved.
由冲裁变形过程的分析可知，决定合理间隙值的理论依据是应保证在塑性剪切变形结束后，由凸模和凹模刃口处所产生的上、下剪切裂纹重合。
According to the blanking distortion procedure, the theory that decide the proper gap is to make sure the edge of the male die and female die's gap can be superposition.
弹孔周围的绝热剪切带沿主剪应力方向形成，与静态塑性变形滑移线方向接近，绝热剪切带上不均匀的变形将产生微裂纹和微孔洞。
An adiabatic shear band formed along the main shear stress around the penetrated hole is approximately consistent with the direction of plastic deformation slip lines in static state.
绝热剪切带的出现和由它引起的裂纹是动态扭矩试验时的重要特征。
The existence of adiabatic shear band and the crack caused by the band are important features in dynamic torsion moment tests.
给出了剪切应力强度因子和裂纹面接触区尺寸的数值结果。
The numerical results of shear stress intensity factor and the length of the crack face contact region are given.
穿晶裂纹源于晶内形变损伤区，其扩展机制为沿滑移面的剪切断裂。
Tranagranular cracks result from deformation damage of grain, and its propagation mechanism is shear rupture along slip plane.
研究了无穷远纵向剪切下圆形弹性夹杂界面裂纹与基体中任意位置螺型位错的相互干涉问题。
The interaction effects between the circular interfacial cracks and the screw dislocation located inside the matrix under longitudinal shear are dealt with.
采用位错分析法，研究弹性纵向剪切情况下圆域中分叉裂纹问题。
The bifurcated cracks problem in circular region in the case of elastic longitudinal shearing was investigated by using dislocation analysis method.
根据非局部线弹性理论研究了剪切模量为指数型的无限大功能梯度材料反平面裂纹问题。
The crack problem in an infinite mediums of functionally graded material (FGM) subjected to antiplane shear is studied by using nonlocal linear elasticity theory.
计算了含有纤维端头裂纹的单向短纤维复合材料的有效纵向拉伸模量和纵向剪切模量，并分析了体分比、刚度比、长径比等物理、几何因素的影响。
The self-consistent finite element method is used to evaluate longitudinal effective Young's modulus and shear modulus for unidirectional fiber composite containing the fiber-end crack.
通过有限元分析方法模拟简单剪切橡胶件粘结处裂纹扩展时撕裂能与裂纹尺寸的关系。
The variation of tearing energy with crack size was calculated for the bonded crack of simple shear rubber using non-linear finite element analysis.
采用位错分析法，研究弹性纵向剪切情况下圆域中分叉裂纹问题。
The branch cracks problems of circular region in elastic longitudinal shear are investigated by the dislocations analysis method.
过大的局部超负荷超过轧辊外层的抗剪切强度时则会引发裂纹。
High local loads at leading edges, cobbles or doubling of the strip end (tail end pinching), exceed the shear strength of the shell material and initiate the crack.
弹性-粘塑性模型对反平面剪切扩展裂纹尖端的应力应变场进行了分析。
An elastic viscoplastic model is used to analyse stress and strain fields at the tip of a propagating crack under antiplane shear.
压敏产生的原因是导电沥青混凝土试件的压缩邻近效应、微裂纹和石料间的剪切力使部分导电通路错位。
Piezoresistivity of ecac may involve proximity effect, microcrack and the staggered arrangements of conductive pass-ways due to shear strength of aggregates.
片层组织绝热剪切带与基体的界面塑性流变特征不明显，并且在该区域观察到了呈快速扩展特征的长裂纹。
Investigation indicated that plastic flow characteristic is not obvious at the interface between ASBs and matrix, which observed long crack in lamellar microstructure.
第二种是平面平行剪切双裂纹。
The second one is about two dimensional two parallel shear cracks.
研究表明，多轴疲劳裂纹主要是沿最大剪切平面或垂直于管形试样的轴线方向扩展。
The results showed that most multiaxial fatigue cracks were initiated and propagated along the direction of maximum shear plane or on the direction perpendicular to the tubular specimen's axis.
从而本文揭示了幂硬化粘塑性材料反平面剪切动态扩展裂纹尖端场的渐近行为。
Therefore the asymptotic behaviour near a anti-plane share dynamic propagating crack-tip field in power-law-viscoplastic material is revealed.
理论分析证明，在剪切载荷作用下裂纹扩展是由于拉伸应力引起的，并非剪切破坏。
Theoretical study shows that the crack extension under shear loading is caused by tensile stress, and it does not belong to shear fracture.
远离绝热剪切带源点的裂纹的形成主要是由平行于剪切方向的孪晶引起的。
The cracks within a propagating shear band are induced by twins paralleling to the shear direction.
等双轴应力较单轴应力状态下的裂纹扩展速率减慢，而纯剪切状态下的裂纹扩展速率加快。
In these areas, they were slower in equibiaxial case and faster in pure shear compared to crack growth rates in uniaxial loading.
试验结果表明，脆性材料的延性切削模式的实现是由于云母晶体对裂纹走向的引导和玻璃相的强烈的剪切变形能力的共同作用。
The test results show that the mechanism of ductile-mode material removal of the brittle material is attributed to a combination of.
试验结果表明，脆性材料的延性切削模式的实现是由于云母晶体对裂纹走向的引导和玻璃相的强烈的剪切变形能力的共同作用。
The test results show that the mechanism of ductile-mode material removal of the brittle material is attributed to a combination of.
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