• Having excluded the effect of welding residual tresses on crack closure, fatigue crack growth rates of the welded join...

    排除焊接残余应力导致裂纹闭合效应后,焊缝影响疲劳裂纹扩展速率与基材相当。

    www.chemyq.com

  • 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应变释放裂纹扩展寿命进行计算

    www.dictall.com

  • The retardation effect of overload is taken into account using crack closure model and the crack opening stress level is assumed to vary linearly in the yield zone produced by the overload.

    采用裂纹闭合模型考虑超载迟滞效应认为裂纹张开应力超载引起塑性区内按线性规律衰减。

    www.dictall.com

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

    循环压载存在着裂纹张开裂纹闭合机理拉伸循环不同

    dict.cnki.net

  • Compressive residual stress increases the crack closure effect at the notch and may lead to a non-propagating crack.

    残余应力使缺口处裂纹合力增大甚至出现非扩展裂纹

    www.ams.org.cn

  • 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.

    根据大量实验资料,本文分析砂岩样品纵横波速度有效压力关系,对实验结果进行回归分析并用裂隙闭合理论进行了解释。

    www.lunwenwa.com

  • Compressive residual stress increases the crack closure effect at the notch and may lead to a non-pr...

    残余应力使缺口处裂纹合力增大甚至出现扩展裂纹

    www.chemyq.com

  • 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,显露出裂纹效应,系因裂纹闭合效应尾迹依赖性

    dict.cnki.net

  • 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主要原因主要包括合龙产生径向力作用、非预应力钢筋构造因素施工影响

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  • Fatigue crack propagation in a compressive residual stress field can be characterized with the closure effect.

    疲劳裂纹残余应力场中的扩展借助于裂纹合力来描述

    dict.cnki.net

  • 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试样应变区的疲劳裂纹闭合效应疲劳裂纹扩展速率

    dict.cnki.net

  • The simulating results have indicated that: the crack closure effect is obviously influenced by the fatigue crack length.

    建立裂纹扩展模型的时候,考虑到裂纹长度裂纹闭合效应影响

    dict.cnki.net

  • 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,塑性诱发裂纹闭合腐蚀条件下变化造成超载后裂纹扩展规律变化主要原因之一。

    dict.cnki.net

  • The typical quantitative models on the crack closure are introduced and commented as well.

    此外,疲劳裂纹闭合现象几种有代表性定量模型了介绍评论

    dict.cnki.net

  • The results turn out to be that the short cracks exhibit severe crack deflection and week crack closure effect.

    试验分析结果表明裂纹扩展的偏折强烈裂纹闭合效应较小。

    dict.cnki.net

  • 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.

    室温蠕裂纹扩展产生延滞的原因主要裂纹闭合同时钝化裂纹偏折形变诱发马氏形成也会起到一定的作用。

    dict.cnki.net

  • The crack closure is dynamically measured by means of interferometric strain-displacement gauge(ISDG).

    激光干涉应变-位移测量ISDG)进行了裂纹闭合点的高精度动态测量

    dict.cnki.net

  • The high fatigue properties were found to be related with higher crack closure stress, rough fracture surface and tortuousity of crack path.

    较高疲劳性能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

    dict.cnki.net

  • 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.

    管线基材裂纹闭合现象较小,闭合原因裂纹尖端尾部残余塑性变形

    dict.cnki.net

  • 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.

    组织组织裂纹大,粗糙度诱发闭合效应强,因而裂纹扩展较幔。

    dict.cnki.net

  • 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.

    过载效应钝化附近残余应力尾部塑性诱导闭合共同作用结果。

    dict.cnki.net

  • 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.

    模型中,三维约束状态显著影响超载塑性从而显著影响裂纹闭合扩展速率

    hkxb.buaa.edu.cn

  • 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.

    模型中,三维约束状态显著影响超载塑性从而显著影响裂纹闭合扩展速率

    hkxb.buaa.edu.cn

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