The average fracture propagation velocity is estimated with a series of crack gauges glued on the specimen.
裂纹传播平均速度由黏接在试样上的一系列裂缝计测量得到。
During the refracturing process, monitoring fracture propagation is important to ensure the success of the job.
在重复压裂过程中，裂缝扩展动态监测是保障作业能否成功的关键。
Numerical Simulation of the multiple radial fracture propagation during the high energy gas fracturing is significant in the study of mechanism.
数值模拟是高能气体压裂径向多裂缝延伸机理研究的重要内容。
During fracture propagation driven by detonation gas in oil well, dynamic response of crack surface under the gas pressure results in fast fracturing.
油井爆生气体对岩石劈裂作用过程，是裂缝面对动态荷载响应并使其发生动态扩展的过程。
The mechanical nature of 121 earthquake faults, the strikes of 40 events and the directions of fracture propagation of 15 events are discussed in this paper.
本文研究了华北121个地震断层的错动方式，40个地震断层的走向，15个地震断层的破裂方式与扩展方向。
The models and computation procedures for determining fracture propagation path were provided, and the software for simulation of fracture propagation was developed.
提出了定向射孔水力压裂裂缝的延伸轨迹计算模型和步骤，编制了裂缝延伸的模拟软件。
The results show that hydraulic fracture propagation is not only related to the orientation of borehole in the stress field, but the magnitude of principal stresses.
通过研究发现，水力裂缝方位不但与井筒在现场地应力场中的方位有关，而且主应力的大小也会影响到裂缝的延伸情况。
In the paper, on the basis of two rupture modes-fracture propagation and shearing slide, the strength of jointed rock is derived by use of statistical fracture mechanics.
本文基于岩体节理断裂扩展和剪切滑移两种失稳破坏机制，运用统计断裂力学方法建立了两种破坏方式下节理岩体强度的理论表达式。
A new idea that the distribution movement of electric charge in the crack tip end being associated with rock fracture propagation produces electromagnetic emission was brought up.
本文提出了岩石破裂时的电磁辐射是裂纹尖端电荷随着裂纹加速扩展运动所产生的假说。
A new idea that the distribution movement of electric charge in the cr ack tip end being associated with concrete fracture propagation produce electromagnetic emission is brought up.
对混凝土断裂时的电磁发射现象进行了理论研究，研究表明：混凝土断裂电磁发射是由于裂纹尖端电荷随着裂纹的加速扩展运动而产生。
This method established the fracture propagation inversion model firstly, based on law of fracture propagation and extended finite element method, by using annealing simulation method.
首先，基于裂缝扩展规律，采用扩展有限元方法，利用模拟退火技术，建立裂缝扩展反演模拟模型；
The causes of arisen crakes and fracture propagation are studied in this article. It also sums up the new technology at home and abroad and evaluates the measures of protecting the arch dam body.
分析了拱坝坝体裂缝的产生原因，并对目前国内外预防和处理拱坝裂缝的新措施、新技术进行较全面的总结和评价；
Fracture mechanism, initiation and propagation of cracks, and the control method of cracks in rock like brittle material under dynamic load are described in this paper.
本文主要论述了动荷载作用下岩石等脆性材料的断裂破坏机理、裂纹形成与扩展以及裂纹的止裂与控制等内容。
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.
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。
Brittle fracture. Fracture that occurs by rapid crack propagation and without appreciable macroscopic deformation.
通过快速裂纹扩展发生断裂，没有明显的宏观变形。
From the view point of material selection, we analyzed their dynamic fracture toughness and crack propagation resistance.
从选材角度对比分析了几种铝合金的动态断裂韧性及裂纹扩展阻力。
When the component is installed on an airplane, this internal damage can lead to crack initiation and propagation, resulting in component fracture.
如果把这样的部件安装在飞机上，其内部损伤会导致裂纹并扩展，最终造成部件断裂。
The study of problems involving crack initiation, propagation and arrest is always the interest of fracture mechanics.
复合型裂纹起裂、扩展和止裂问题一直是断裂力学研究的重点。
The primary failure model is fatigue fracture that is always resulted by the crack initiation and propagation.
疲劳断裂是气门弹簧失效的主要模式，它是疲劳裂纹萌生及其扩展的结果。
To analyze the characteristics of TBCs such as residual stress, bond strength, fracture toughness, and crack propagation ratio, the Young's modulus and Poisson's ratio are important parameters.
为确定热障涂层的残余应力、结合力、断裂韧性、疲劳裂纹扩展速率等性能和特性，需要知道其杨氏模量和泊松比。
It is the initial damage, damage evolution and propagation fracture that result in various failure of jointed rock mass.
正是由于这些节理裂隙的初始损伤、损伤演化、扩展断裂等缺陷导致岩体产生了各种形式的破坏。
The mechanical properties of the butt welded joints have been evaluated according to the impulsive and fracture toughness as well as the rate and threshold values of fatigue crack propagation.
根据试验测定的焊缝各区冲击韧性、断裂韧性、疲劳裂纹扩展速率和疲劳裂纹扩展门槛值，对焊缝力学性能作出综合评价。
The formation and propagation mechanism of the cracks is discus - sed and the cause for the stress corrosion fracture in the brass pipe is elucidated.
文中讨论了裂纹的形成和传播机制，并阐明了铜管出现应力腐蚀破裂的原因。
The results showed that manufacturing defects of the bolt resulted in initiation and propagation of fatigue crack, and uneven loading of the bolt speeded up failure process of fatigue fracture.
确认螺栓机加工不当引起疲劳裂纹的萌生及扩展，加之螺栓受力不均匀加速了疲劳断裂过程。
Fracture test of the BT20 indicates that brittle unstable fracture occurs after ductile crack initiation and slow propagation for all the compact tension (ct) specimens.
BT 20钛合金断裂试验表明，CT试样均在裂纹延性启裂并缓慢扩展后，发生脆性失稳断裂。
This paper is devoted to the problems concerning the propagation and fracture of the cracks on the welds of the tubes under the random load conditions.
本文研究在随机载荷作用下，管状杆件焊接部位裂纹的扩展及断裂问题。
It is shown that the fracture of concrete behaved complicatedly and irregularly, which underwent explicitly a subcritical crack growth prior to the unstable crack propagation.
结果表明：混凝土断裂是一个复杂的不规则过程，存在明显的亚临界扩展现象。
It is shown that the zigzag grain boundary may delay the initiation, growth and propagation of crack, as well as may also influence the crack morphology and the fracture mode markedly.
研究表明，弯曲晶界对裂纹的萌生、长大及扩展，对裂纹的形态及断裂方式，都有显著的影响。
The dynamic plastic fracture toughness CTOD and its variation with different. crack propagation speeds.
塑性动态断裂韧性CTOD，及其在不同裂纹扩展速度下变化规律的测试。
The dynamic plastic fracture toughness CTOD and its variation with different. crack propagation speeds.
塑性动态断裂韧性CTOD，及其在不同裂纹扩展速度下变化规律的测试。
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