随着预损伤程度的增加，裂纹面密度增大。
The surface density of cracks increases with the increasing of the degree of pre-damage.
云纹方法，直观显示了裂纹面附近位移场的分布。
Meanwhile, moire method was used to observe the displacement distribution in the vicinity of the crack surfaces.
有一种观点只要可逆能量消耗，不会产生新的裂纹面。
There is a view as long as the reversible energy is consumed, won't produce new crack surface.
给出了剪切应力强度因子和裂纹面接触区尺寸的数值结果。
The numerical results of shear stress intensity factor and the length of the crack face contact region are given.
接近锯切口和沿着边缘的裂纹部分相对于裂纹面中心而肯定是闭合的。
The portions of the crack near the saw cut and along the edges are closed in relation to the center of the crack face .
对矩形裂纹面进行了数值计算，得到了应力强度因子沿裂纹边界的分布规律。
Numerical calculation has been taken for rectangular crack and the distribution of stress intensity factors along the crack edge has been obtained.
双态组织的断裂应力随加载速度的上升而增加，微裂纹面密度随加载速度的增加明显下降；
The fracture stress of DP microstructure increased with the increase of displacement speed, and the microcrack density increased with the decrease of displacement speed.
位移边界积分方程的源点配置在非裂纹边界上，面力边界积分方程的源点配置在裂纹面上。
The former is collocated exclusively on the uncracked boundary, and the latter on one side of the crack surface.
其主要结论是：当裂纹面内的温度埸恒定时，能量释放率将随时间而减少，直至某一较低的极限值。
The main conclusion is that: When the temperature field in the crack surface is uniform, the energy release rate will decrease with time, until it reaches a lower limit value.
研究了四点弯曲型试件在各种类型载荷作用下的裂纹面位移，并考虑了裂纹尖端塑性区对它的影响。
A crack surface displacement of four-point-bend specimen under three types of loading is studied in this paper.
根据裂纹的特点，可以把它近似为一个没有厚度的面缺陷，其作用由分布在裂纹面上的等效电流偶极子层代替。
Considering that the crack thickness is usually very small, it can be taken as a'surface defect' with zero thickness.
通过外插裂纹扩展速率与裂纹长度之间的关系， 可近似得到裂纹长度为零时无裂纹面滑移接触影响的裂纹扩展速率。
The crack growth rate without the influence of crack surface contact was determined by extrapolating the relationship between the crack growth rate and the crack extension to the zero crack length.
由迭加原理，可分离出任一单个裂纹面在无限大板中的虚拟应力，从而求出有限或无限域中各条裂纹的应力强度因子值。
By the principle of superposition fictitious stress on any individual crack surface in infinity can be resolved and also its value of stress intensity factor in infinity or finite body is obtained.
在考虑管道长度特征的前提下，把管道近似地看作长梁或薄壳，然后以“含裂纹零维度单元”模型（即垂直于裂纹面方向的单元尺度为零）计算出裂纹对管道动态特性的影响。
This paper treats a pipe as a beam or as a thin shell. Then, the effect of cracks on the dynamic characteristics of pipes is calculated by means of the model of zero dimension element with crack.
在这一方面，人类遭受了根本的溃裂，溃裂是如此具有根本性以至于其它一切裂纹都根源于此。
And in this respect mankind has suffered a fundamental debacle, a debacle so fundamental that all others stem from it.
大模数重载汽车主减速器盆形齿轮经渗碳淬火后，齿轮齿面经常会出现裂纹。
Cracks frequently generated in basin gear of big modulus main reducer used in heavy load truck after carbonizing and quenching.
断裂面从轴承部位外部开始延伸到整个截面。典型的是从圆弧部开始，常常会由于疲劳而产生的裂纹的扩展后引起的。
Fracture lines start from the outside and spread over the whole cross section, particularly starting in the fillet area and very often after a fatigue crack propagation.
通过化学成分分析、硬度试验、宏观和微观检验等方法，对减速机齿轮齿面弧形裂纹的产生原因进行了分析。
The reason of arc crack on retarder gear surface was analyzed by means of chemical composition analysis, hardness testing, macrostructure and microstructure examination.
本文试图借助复变函数方法求解在面斜对称载荷下无限各向异性弹性介质的周期裂纹问题。
This paper attempts to solve the periodic crack problems of infinitive anisotropic media for plane skew-symmetric loadings by means of the method of complex function.
至少有60座桥上出现的疲劳裂纹是由于小间隙处的面外变形引起的。
At least 60 bridge sites developed fatigue cracks as a result of out-of-plane distortion in a small gap.
对重载列车E级钢钩舌进行了应力分析，导出了钩腕面裂纹的应力强度因子表达式。
The stress of E-grade steel coupler knuckle was analyzed and the expression of stress intensity factor of the cracks on the coupler knuckle wrist area was given.
得出如下结论：大坝的自重和坝中上高程地基减弱是造成拱坝下游面最初发生纵向裂纹的主要原因；
The results shown that: weight and weak foundation close to middle-upper dam lead the vertical cracks to propagate along the downstream wall;
轨道车辆车轮中的缺陷，特别是车轮踏面裂纹是引发事故的巨大隐患。
Flaw of the railway vehicle wheels, especially the crack of the wheel tread, is the most potential trouble for the accident.
将其应用于发电厂汽轮机金属部件如高、中压缸结合面以及汽轮机叶片的表面和近表面裂纹快速扫查和测深，取得了一定效果。
The technique proved effective when it was used in rapid crack testing and crack depth measuring of steam turbine metal parts such as joint face of hig.
另一方面，热处理工艺不当使得铸造应力及机加工的残余应力无法彻底消除，这样加剧了裂纹的产生和扩展。
On the other hand, the improper heat treatment operation can not completely relieve the casting stress and remnant stress, and further enhances generation and expansion of cracks.
根据表面扩散控制下物质迁移规律，建立有限单元法，对裂面形貌扰动下二维微裂纹演变过程进行数值模拟。
Based on the theory of surface diffusion, a finite element method was developed to simulate shape evolutions of two-dimensional microcracks with surface perturbation.
从原材料、焊接材料、焊接工艺三方面分析了中部槽产生裂纹的原因，从而得到一种避免裂纹产生的方法及预防措施。
Through material, weld material, weld technology. Analyses the reason when cracking-fusion product in line pan. Introduces a method of preventing cracking-fusion production.
岩体爆破开挖过程中，开挖荷载瞬态卸荷伴随着爆破破岩的裂纹扩展、爆生气体逸出以及新自由面形成等过程而发生。
The transient release of excavation load is accompanied by the development of cracks, the outburst of detonation gases and the formation of new free surface during the rock fragmentation by blasting.
连铸板坯宽面鼓肚对铸坯中心偏析和裂纹有较大影响，为计算板坯宽面鼓肚，按蠕变规律，需解一个三阶微分方程，按弹塑性规律，需解一个二阶微分方程，十分费时。
In order to compute bulging of wide face of continuous cast slab, it is necessary to solve a third order differental equation for creep or a second order one for elastoplastic deformation.
连铸板坯宽面鼓肚对铸坯中心偏析和裂纹有较大影响，为计算板坯宽面鼓肚，按蠕变规律，需解一个三阶微分方程，按弹塑性规律，需解一个二阶微分方程，十分费时。
In order to compute bulging of wide face of continuous cast slab, it is necessary to solve a third order differental equation for creep or a second order one for elastoplastic deformation.
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