查询词典 sun crack

The constant term and non-singular terms, which are called general T-stress here, play a significant role in determining the stress and strain fields around a crack tip which in turn can affect the calculation of stress intensity factor of the crack.

裂纹尖端的奇异应力场可以表达为Williams级数展开的形式，其中常数项和非奇异项对裂纹尖端的应力应变场有着很大的影响，这些影响反过来作用于裂纹应力强度因子的计算。

On the basis of Muskhelishvili's complex function theory, an auxiliary field of mixedmode crack was accomplished, and then using Betti's reciprocal work theorem, a path independent contour integral method for stress intensity factors of mixed-mode crack was obtained.

本文用复变函数理论推导出裂纹的辅助场，并用Betti功互等定理给出求解混合型裂纹应力强度因子的远场围绕积分法。

Through examining and analyzing of the crack in corbel of bridge of Dangtu road in Hefei, a strengthening scheme to paste the steel plate is put forward. The theory of non-linear finite is adopted to analyze the scheme with three dimensional finite element. The result of stress at the crack point which has been reinforced is also made clear.

通过对合肥市当涂路桥牛腿裂缝诊断分析，提出外贴钢片的加固方案，并基于非线性有限元法基本理论，对加固方案进行三维数值分析，给出了片材加固后的牛腿裂纹尖端应力的效果分析。

Critical load and relevant crack length and displacement data from these experiments were used in a finite element model to calculate the crack tip mode angles, and corresponding critical energy release rate.

以试验测得的临界载荷及对应位移、裂纹扩展长度为条件，建立与测试装置对应的有限元模型，计算裂纹尖端模式角及在此模式角下的临界能量释放率。

It is found that,there are two types of interfacial cracking patterns of the ceramic coat: in the cooling process, mode Ⅰ is vulnerable to crack at the peak position of the cosine curve, and mode Ⅱ at the middle position; in the heating process, interface edges are introduced into the ceramic coat/substrate system as a result of the vertical cracks emergence, and the ceramic coat will transversely crack at these positions because of the stress concentration effect.

计算时对陶瓷层材料分别按理想线弹性本构和黏塑性本构模型开展了模拟。分析发现，陶瓷层的界面开裂存在两种模式：在降温过程中，陶瓷层容易出现界面波峰处的Ⅰ型开裂与腰部位置处的Ⅱ型开裂；在升温过程中，陶瓷层容易发生垂直开裂使结构中出现陶瓷层/基体的界面端，界面端部严重的应力集中效应使陶瓷层容易在该处横向开裂形成界面处的边裂纹。

The curve of fatigue crack growth rate is calculated, and the behavior of fatigue crack growth is simulated.

计算了疲劳裂纹扩展速率曲线，模拟了疲劳裂纹的扩展行为。

Quenching crack propagation characteristics of the organizations on both sides without decarburization phenomenon significant difference between crack and materials and forging cracks.

淬火裂纹的组织特征是裂纹两侧无脱碳现象，明显区别与锻造裂纹和材料裂纹。

In situ SEM observations have revealed that fatigue crack propagation is caused by the shear band decohesion around the crack tip and the formation and cracking of the shear band is mainly caused by the plasticity generated in the loading part of a load cycle.

论文摘要： In-Situ SEM的研究揭示了疲劳裂纹的扩展是由裂纹尖端附近的剪力区散屑和生成热引起的，而剪力区裂纹主要是在循环负载下受载部位产生塑性变形引起。

In order to study the fatigue of pressure vessel commonly encountered problem in engineering with large destructibility , based on the theory of fracture mechanics , the pressure vessel existing original crack was equivalent to the problem of infinite flat with center crack .

为了分析工程中常见的破坏性极大的压力容器疲劳问题，基于断裂力学理论将存在初始裂纹的压力容器等效为无穷远处作用均匀拉应力的含中心裂纹无限大板问题，解出表面半椭圆裂纹和穿透裂纹的应力强度因子；利用断裂判据得到裂纹的临界断裂尺寸；采用Paris表达式对裂纹扩展速率进行描述，推导出初始裂纹在不同裂纹尺寸和形式下的裂纹疲劳扩展寿命。

Based on genetic neural network and modal strain energy, a two-stage method for detecting diagonal crack s is proposed to identify the location, angle and depth of diagonal crack s in beams.

基于遗传神经网络与模态应变能，提出了一种斜裂缝两阶段诊断方法，识别梁体中斜裂缝的位置、角度和深度。

But GST= 0.156, Nm=1. 588. As a result, the foundation of Youyongchi Avicennia marina population was the result of the migration of hypocotyles and human factors.

这项工作可以为海岸防护林中新引进种类的判定以及为研究种群建立者效应方法的确定提供科学依据。

The two-dimensional CDRC-ADI-FDTD update equations for collision unmagnetized plasma are induced. The unconditional stability of the CDRC-ADI-FDTD formulation for collision unmagnetized plasma is obtained by the examples.

推导了碰撞非磁化等离子体中的二维CDRC-ADI-FDTD迭代公式，并用算例验证了碰撞非磁化等离子体CDRC-ADI-FDTD算法也是无条件稳定的。