查询词典 crack

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。

When crack propagation meet with mass with great strength, the direction of crack propagation will deviate from the particle with high strength.

即当裂纹扩展时遇到较强的介质时，裂纹的扩展方向会发生偏转，并绕过强介质继续扩展；较弱的介质和已贯通的裂纹组对其它组裂纹的贯通有屏蔽作用。

After the initiation of crack, the crack propagating of alloys with 0.5%Ce addition is accelerated evidently because of the appearance of needle rear earth rich phases which dissever the matrix and lead to the decrease of mechanical properties and thermal fatigue resistance.

加入0.5%Ce的合金在裂纹形成后期扩展速度明显加快，这是因为合金中出现针状富稀土相，这种针状相割裂了基体，使得合金力学性能降低、热疲劳抗力下降。

Utilizing plane sectorial domain Hamilton system function via variable substitutes and eigenfunction expansion method, an analytical element is proposed in this paper for the crack analysis of reinforced concrete structures combining the bridging model and Dugdale model. Combined with finite element, nolinear crack problems of reinforced concrete structure can be analyzed.

利用平面扇形域哈密顿体系方程，通过分离变量法及共轭辛本征函数向量展开法，结合Dugdale模型和桥联力模型，推导了钢筋混凝土结构裂纹尖端的解析元列式，将此解析元与普通有限元结合，可用于分析钢筋混凝土的非线性断裂问题。

Analyzing the causes of surface crack of GCr15 bearing steel wire with metallurgical microscope, Brinell and Vickers Durometer, the result shows that the surface of wire rods has no crack, which comes from the course of drawing .

运用金相显微镜、布维氏硬度仪等分析手段，对GCr15轴承钢盘条经拉拔成钢丝后成品表面产生间断裂纹进行分析，结果表明盘条表面无裂纹，成品钢丝的裂纹主要产生于拉拔工艺过程。

Analyzing the causes of surface crack of GCr15 bearing steel wire with metallurgical microscope, Brinell and Vickers Durometer, the result shows that the surface of wire rod s has no crack, which comes from the course of drawing.

运用金相显微镜、布维氏硬度仪等分析手段，对GCr15轴承钢盘条经拉拔成钢丝后成品表面产生间断裂纹进行分析，结果表明盘条表面无裂纹，成品钢丝的裂纹主要产生于拉拔工艺过程。

Singular integral equation ; crack ; interface crack ; elastic wave scattering ; fracture dynamics

奇异积分方程；裂纹；界面裂纹；弹性波散射；断裂动力学

The boundary of the crack domain is constructed with the standard Koch fractal curve and the elastic strain energy of the plate is given out by using the perimeter-area relation of the fractal crack domain.

以标准Koch分形曲线构造裂纹的边界，并由分形区域周长与面积的关系推导出平板的弹性应变能。

Crack ; fault ; elastodynamics ; crack front wave ; limiting rapture speed ; self-heading slip pulse

裂纹；断层；弹性动力学；裂纹前缘波；极限断裂速度；自愈合滑错脉冲

Through comparing with the results by simulation to study the effects of theprojectile"s final velocity, the angle of rotation and the ballistic trajectory"s migration withdifferent projectile"s rotating speeds, different target"s moving speeds and differentpenetration angles.

通过比较数值模拟的结果来研究不同弹头转速、目标速度、侵彻角对侵彻过程中弹头最终速度、翻转角度和弹道偏移的影响。

I love stationery and all the accoutrement of writing.

我爱文具以及所有的书写的工具装备。