裂纹尖端

线性强化弹塑性裂纹尖端韧带线场

Ligament fields ahead of a crack tip under piece-wise elastic-plastic model

探讨了稳恒电流作用下无限大薄板裂纹尖端电流密度及焦耳热源功率的计算表达式，并进一步推导了裂纹尖端区域温度场及热应力场的分布形式。

Expressions of current density and Joule heat source near the crack tip in an infinite plate under constant current were derived , as well as the temperature field and the stress field near the crack tip .

全息干涉法研究裂纹尖端应力状态分布电子散斑干涉和Video全息干涉

Investigation on stress field on crackle tip by holographic interferometry Electronic Speckle Pattern Interferometry and Video Holographic Interferometry

II型动态扩展裂纹尖端场的仿真分析

Simulation analysis of mode II dynamic propagating crack-tip

润滑油对接触表面斜裂纹尖端K因子的影响

Influence of lubricant on stress intensity factors of surface lean crack in rolling / sliding contact

C时其断裂参量特征值裂纹尖端张开位移符合三参数威布尔分布，并对材料力学性能进行分析；

Statistical analysis indicates that crack tip opening displacement of fracture parameter eigenvalue at - 78 ? C obey three parametric Weibull distribution ;

分析了裂纹尖端附近某一区域内的应变能的变化，提出了混合型裂纹等W线应变能准则。

This paper analyses the change of the strain energy in a region around the crack tip .

云母表面加载裂纹尖端的AFM研究

Investigation of loaded crack tip on mica surface by atomic force microscopy

本文研究了在应变损伤材料中的动裂纹尖端弹塑性场假定介质服从J2流动理论，且损伤规律以幂函数应变弱化的形式渐进地给出。

In this paper the dynamic elastic-plastic field near a crack-tip running in a strain-damage material is investigated .

研究结果表明，ANSYS程序裂纹尖端应力强度因子计算方法的计算精度可以满足工程设计和分析需要。

The results show that the accuracy for crack tip stress intensity factor using ANSYS software is enough for engineering designs and analysis .

解方程后计算了裂纹尖端塑性区尺寸及裂纹尖端张开位移COD，给出了应变能释放率算式。

The solutions are used to formulate the plastic zone length of the crack tip and COD and get the releasing ratio of strain energy .

静止裂纹尖端实验的HRR奇异场

The experimental HRR singularity field of the stationary crack - tip

Reissner平板裂纹尖端的分区模式及渐近解

Matched assembly and asymptotic solution near the crack-tip in a Reissner plate

裂纹尖端张开角CTOA及其与J积分的联合判据

On the Criterion of Combining Crack Tip Opening Angle CTOA With J & Integral

超声波Fractography在测试裂纹尖端动态剪切模量中的应用

The Application of the Ultrasonic Fractography on Testing Dynamic Modulus of Rigidity

本文给出一种将常规电阻应变片贴在距裂纹尖端较远处测量Ⅰ型裂纹应力强度因子K1的方法。

By adhering the conventional strain gauges to a place sufficiently far from the crack tip , a method for determining the open-mode Stress-Intensity Factor ( SIF ) K1 is developed in this paper .

在该弱形式的基础上，利用特征方程展开方法（eigenfunctionexpansiontechnique），可以得到一个分析压电材料裂纹尖端处力电耦合场奇异性的特殊的一维有限元列式。

By using the eigenfunction expansion technique and the weak form , a special one-dimensional finite element formulation is developed to determine singularities of electromechanical fields at the crack tip in piezoelectrics .

为了研究黏性效应作用下的界面动态扩展裂纹尖端渐近场，建立了刚性-粘弹性材料界面II型动态扩展裂纹的力学模型；

A mechanical model of dynamic growing interfacial crack of mode II between rigid material and viscoelastic material was established in order to investigate viscous effect in dynamic growing interfacial crack-tip asymptotic field .

按此法，采集在等色线条纹的非线性区域之外的数据，并通过逐步逼近至裂纹尖端来确定KⅠ和KⅡ。因此，不必特别注意试件的制备。

According to this method , data are taken from outside of the non-linear region of the isochromatic fringe pattern , and K_ ⅰ and K_ ⅱ determined through step-by-step approximation to the crack tip .

采用复势的罗朗展开、Fourier变换以及摄动方法，最后以幂级数形式给出裂纹尖端的应力强度因子计算公式。

The stress intensity factors at the crack tip are computed by the laurent series expansions , Fourier transform and perturbation techniques ' and results are given by power series for the stress intensity factors .

介绍了裂纹尖端张开位移的含义，CTOD试验所用的主要设备及试验过程。

It is introduced the meanings of CTOD , the main equipment used by CTOD test and its test process .

数值计算表明，裂纹尖端场主要受材料的蠕变指数n和马赫数M的控制，这为解决工程实践中所遇到的相应的问题和建立材料的破坏准则提供理论的参考。

The numerical results show that the near-tip field is mainly governed by the creep exponent n and Mach number M. The study will provide theoretical references for the corresponding problems encountered in engineering practices and the founding of fracture rule of material .

对界面裂纹尖端场采用外推法求解强度因子并利用J积分的二维回路线积分法计算能量释放率。

The stress intensity factors are obtained by using the stress-extrapolation method to stress field near the crack tip , and the energy release rates are calculated out by two-dimensional linear closure integral calculation of J-integral .

利用Mises屈服准则从理论上分析了Ⅰ－Ⅱ复合型裂纹尖端前缘的塑性区分布。

In this paper , with Mises yield criterion , the plastic zone distribution in front of crack tip with mixed mode (ⅰ ⅱ) loading is analyzed theoretically .

循环载荷使得裂纹尖端的塑性区循环硬化/软化，这使无位错区的应力和裂纹尖端区域的J积分的值升高，从而有可能导致开裂。

The effect of cyclic loading makes the plastic zone hardening ( or softening ), which raises the stress level in Dislocation-Free Zone ( DFZ ) and the value of - integral , and may lead to fracture .

研究给出无限大电磁固体裂纹尖端电塑性区和磁塑性区的大小、广义强度因子和局部J积分；研究了力、电、磁等载荷对局部J积分的影响。

The sizes of the electric yielding zone and the magnetic yielding zone , the extended intensity factors and the local J-integral are obtained . The effect of the combined mechanical-electric-magnetic loadings on the local J-integral is studied .

采用两种不同热处理制度获得不同组织状态的材料，采用裂纹尖端张开位移（COD）试验及Hopkinson压杆试验方法研究了温度及加载速率对30A钢断裂韧度的影响。

The effects of temperature and loading rate on fracture toughness of 30A steel were studied by crack opening displacement ( COD ) and Hopkinson compression bar experimental method .

首先用Reissner型板的裂纹尖端位移场计算奇异单元的刚度矩阵；

Firstly the stiffness matrixes of the singular elements are completed on the base of the displacement field near the crack tip of the Reissner plate .

提出疲劳裂纹尖端塑性核半径门槛值Rth的概念及计算方法，Rth是材料性质。

In this paper , a concept for the radius of plastic core at the top of a fatigue crack is raised .

采用自行设计的加载压头和粘接在V形切口短棒岩石断裂韧度试件上的2个半圆形钢片，实现了通过压头施加压缩载荷从而使裂纹尖端承受拉仲载荷的目的。

On the basis of the chevron , notched short-rod specimen for fracture toughness test suggested by ISRM , a designed wedge and two semi-circle slices were used to enable compressive force to be applied on the wedge , whereas the crack tip remained loaded in tension .