The dislocation distribution function in the plastic zone at a crack tip is calculated with the help of a modified BCS-type crack model.
本文改进BCS型裂纹位错模型，并对裂纹顶端范性区的位错密度分布进行了计算。
These negative dislocations seem to enter the crack tip and blunt it, resulting in a dislocation-free zone at the crack tip.
这些负号位错将移至裂纹顶端并使之钝化而留下一个无位错区或低位错密度区。
The strain fatigue properties, the fractograph near fatigue crack sources and the fatigue dislocation structures of LY12CZ aluminium alloy are investigated in some detail.
较详细地研究了LY12CZ铝合金的应变疲劳性能、疲劳裂纹生成区断口特征及疲劳位错组态。
The variation of screw dislocation forces for correlative material parameters and different radians of crack or rigid line is discussed particularly.
并讨论了位错力随材料相关参数，非理想界面参数，裂纹和刚性线弧度的变化规律。
The method simulates the crack hiding in infinitely large elastic media as dislocation loop in continuous distribution.
此方法将埋在无穷大弹性介质中裂纹，模拟为连续分布的位错环。
The interaction between piezoelectric screw dislocation and circular crack under remote uniform heat flux was investigated.
研究压电材料在均匀热流作用下螺型位错与圆弧裂纹的相互作用。
Its explicitly explained how the cleavage step pattern is formed by the cleavage crack intersecting with screw dislocation.
本文对解理台阶的形成模型——解理裂纹与螺位错交割模型进行了诠释。
Nucleation of crack is due to dislocation pile-up mechanism and elastic anisotropy mechanism.
裂纹形核主要是通过位错堆积、晶界角源及弹性各向异性三种机理产生的。
The elastic interaction between a screw dislocation dipole and a mode III interface crack is investigated.
研究了多晶体材料中螺型位错偶极子和界面裂纹的弹性干涉作用。
In the second chapter, the interaction among a screw dislocation, circular interfacial crack and inclusion is solved based on the electromechanical coupling relation of piezoelectric material.
第二章基于压电材料的机电耦合关系求解螺型位错、圆形界面裂纹与夹杂之间相互作用的问题。
In the fourth chapter, the interaction among a screw dislocation, circular interfacial crack and inclusion under remote uniform heat flux is derived.
第四章分析压电材料在远端均匀热流场下螺型位错、圆形界面裂纹与夹杂之间相互作用的问题。
This paper investigates the problem of the elastic interaction between a screw dislocation dipole and a circular interface crack.
该文研究了螺型位错偶极子和圆形夹杂界面裂纹的弹性干涉作用。
The problem of a cylindrical interface crack is reduced to a system of singular integral equations with the aid of two unknown dislocation functions at the interface crack surface.
以裂纹面上的位错函数为未知量将圆柱型界面裂纹问题化成一组奇异积分方程的求解问题。
According to the mechanism that micro-cracks come into being from the dislocation, the dislocation piled-up model is used to describe the grinding crack.
研究中，将宏观断裂力学及微观断裂物理相结合，根据位错产生微裂纹机制，对磨削过程的微裂纹的形成采用位错赛积模型来描述。
Dislocation cell and sub grain formed in ferrite grain are found at the stage of fatigue crack propagation in the area of crack tip.
疲劳裂纹扩展阶段裂纹尖端附近为形成于铁素体晶粒内的位错胞及亚晶。
The computational results clearly show the processes of nucleation and the radiation of the dislocation around the tip of the crack.
计算结果清楚地揭示了裂纹尖端位错成核与发射过程。
The numerical examples are provided to show the influences of the material properties, the wedge Angle, dislocation position and the crack length on the interaction.
最后通过数值算例，针对不同问题讨论了材料常数、楔口角度、裂纹长度对相互作用的影响。
Cleavage fracture is a typical brittle fracture and also a process consisted of crack producing and spreading, and the mechanism is related to dislocation and crystalline grain.
解理断裂是典型的脆性断裂，解理断裂也是一个裂纹萌生和扩展的过程，其机制与位错和晶粒有关。
On the theory of dislocation free zone, crack tip emitted the dislocations , which piled up the tangled in ahead of the intermetallic compounds.
根据位错贫化带理论，裂纹尖端发射的位错将在沉淀析出的金属间化合物前塞积和缠结。
As a result, analysis and discussion show that the influence of interfacial crack or rigid line inclusion on the interaction between screw dislocation and inhomogeneity is significant.
分析结果表明，界面裂纹和刚性线夹杂对螺型位错与夹杂的干涉作用具有强烈的扰动效应。
The interaction among a screw dislocation, circular inclusion and interface crack or elliptical inclusion and interface crack under remote uniform heat flux is mainly researched in this paper.
运用共形映照、解析延拓以及柯西型积分运算等复变函数方法研究无限大平面中楔型向错偶极子与界面裂纹、圆形夹杂的弹性干涉问题。
The interaction among a screw dislocation, circular inclusion and interface crack or elliptical inclusion and interface crack under remote uniform heat flux is mainly researched in this paper.
运用共形映照、解析延拓以及柯西型积分运算等复变函数方法研究无限大平面中楔型向错偶极子与界面裂纹、圆形夹杂的弹性干涉问题。
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