In this paper the stress intensity factor of a semi infinite moving crack under the concentrated force is derived.
导出了集中力作用下半无限长运动裂纹的应力强度因子，建立了描述裂纹扩展速度较小时材料动态裂纹特性的数学模型，研究了材料动态断裂性能对裂纹运动的影响，得到了一些有意义的结
By applying the theory of complex function and the principle of strain energy,the present paper obtains an asymptotic expansions for the fields of thetip of a Ⅲ-mode curved moving crack.
本文用复交函数理论及应变能原理，导出了Ⅲ型曲线运动裂纹尖端场的渐近展开式。
In this paper the anti-plane moving crack in non-homogeneous elastic materials is studied by an analytical method.
用解析方法研究了非均匀弹性材料中反平面运动裂纹问题。
After that,the dual equations of dynamic cracks problem in the 2D piezoelectric materials were founded with the help of Fourier reverse transformation and the introduction of boundary conditions.
首先引入势函数,用势函数表示压电材料的基本微分方程,并采用Laplace变换、半无限对称Fourier正弦变换和Fourier余弦变换,对微分方程进行变换和初步求解;然后通过Fourier反演和引入边界条件,建立了二维压电材料动态裂纹问题的对偶方程组;再根据Bessel函数性质,利用Abel型积分方程及其反演,将对偶方程组化为第二类Fredholm积分方程组。
This method of investigating dynamic crack has become a more systematic one that is used widely.
引入势函数,形成运动微分方程,对运动微分方程和各种响应进行Laplace变换及Fourier正弦、余弦变换,最后求解由边界条件形成的对偶方程———这种研究动态裂纹的方法已经被广泛使用并成为比较系统的方法· 以一种模型为例,对其推演过程进行了研究,最后发现:此方法在数学推演时,存在着不严密的问题,推演结果带有偶然性,不具可信性·
Antiplane Yoffe-type Moving Crack in Functionally-graded Materials;
功能梯度材料中反平面Yoffe型运动裂纹
Anti-plane Moving Yoffe-crack in Functionally Graded Piezoelectric Materials;
功能梯度压电材料反平面Yoffe型运动裂纹问题
A Moving ModeⅢ Crack at Interface Between Two Different Functionally Piezoelectric Piezomagnetic Materials
不同功能梯度压电压磁带黏接界面上的反平面运动裂纹
The st udy shows that the coupled elastic and electric fields inside piezoelectric med ia depend on the speed of the crack propagation, and have singularity at the cr ack tip.
研究表明 :介质内的耦合场与裂纹运动速度有关 ,在裂纹尖端有奇异 ;
Study on Transversal Corner Crack of 15Mn2CrVNb Bloom for Wagon Brake Beam Manufacturing
货运机车制动梁用15Mn2CrVNb钢方坯角部横裂纹研究
Integral Transform Technique for the Stationary and Dynamic Collinear Cracks Problem in a Piezoelectric Strip;
积分变换方法求解压电带形中静止或运动的共线裂纹问题
Analytical Solution of Mode Ⅲ Asymmetrical Interface Crack under Action of Moving Variable Loads
Ⅲ型非对称界面裂纹受运动变载荷作用下的解析解
Dynamic Split Tension Strength of Marble and the Properties of Crack Initiation and Crack Propagation under Dynamic Split Tests;
大理岩动态劈裂拉伸强度和裂纹起裂扩展特性
Based on the boundary Variational theorem, the energy release quantity and energy release rate (dynamical crack extension force) along the crack bounndary are obtained.
由此可以求得动态裂纹扩展时,沿裂纹边界的能量释放量和能量释放率(动态纹裂扩展力)。
Analysis of Fundamental Frequencies of Rotating Shafts with Transverse Crack;
含横向裂纹的转动轴的振动基频分析
EFFECT OF CRACK FACE CONTACT AND FRICTION ON DYNAMIC STRESS INTENSITY FACTORS FOR A DOUBLE-EDGE CRACKED PLATE
裂纹面接触摩擦对双-边裂纹板动态应力强度因子的影响
Effects of the Surface Perturbation and the External Stress on the Evolutons of Microcracks;
裂面形貌扰动和外载对微裂纹演变的影响
The results showed that the weak interface can block the motion of the dislocations and change the propagation direction of the main crack, and result in forming lamella fracture surface.
结果表明,弱界面有阻碍位错运动、转主裂纹扩展方向的作用,可形成分层断口。
The rolling axletree in the power plants may split during the long time running.
火电站的发电机组的滚动轴承由于在长时间的运行和碰撞中，有可能导致裂纹的产生。
Research on Sprinters Palm Lines and Finger Loops and Whorls;
对短跑运动员手掌纹、指纹的调查研究
The engine cracked on the first test flight.
在首次试飞时，发动机发生裂纹。
Study on Vibration Diagnosis of Crack in the Jacket Platform;
导管架海洋平台裂纹的振动诊断研究
Dynamic characteristics of fixedly supported beam with cracks under shearing load
固支裂纹梁在剪切载荷下的动态特性