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裂纹系统
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  crack system
     Vickers indentation test indicates that indentation crack system of the composite ceramics belongs to the median crack system, critical value of indentation load which induces the median crack to extend is 30kg.
     Vickers压痕试验发现,该复相陶瓷的压痕裂纹系统属于中位裂纹系统,而引发复相陶瓷中位裂纹扩展的压痕压制载荷临界值为30kg;
短句来源
     The median/radial crack system and the lateral crack system which are two kinds of indentation cracks, can be employed as fundamental theory concerning the study on grinding processes of ceramics.
     指出陶瓷材料的两类压痕裂纹:中位/径向裂纹系统和侧向裂纹系统可作为陶瓷材料磨削加工过程研究的理论基础。
短句来源
     It is demonstrated that the K1c values of test material do not abide by the median crack system equation and abide by palmquist crack system equeations. Theindependent fracture toughness from indentation load at room temperature has been observed in this material.
     结果表明,试验材料在试验条件下的断裂韧性不遵从半月状裂纹系统方程,而遵从巴氏裂纹系统方程,其室温压痕断裂韧性保持与压痕载荷的独立性。
短句来源
     From analysis the microstructural characteristic and the crack system of the coal set, based on fracture mechanics and damage mechanics theory, the mechanism of coal damage and fracture has been analyzed and the coal damage and fracture rules have been put forward, providing the certain theories for improving surrounding rock control and coal production efficiency.
     从分析煤岩的微结构特征和煤岩体的裂纹系统出发,根据损伤力学和断裂力学理论,初步探讨了煤岩体的损伤断裂机理,提出了煤岩体的损伤断裂准则,为煤炭开采中合理进行煤岩破碎和改进煤炭生产工艺及煤炭品质等提供一定的理论参考。
短句来源
     In order to make the experiential parameters reliable in the relation of HV-KIC for Palmqvist crack system, HV and series indentation parameters such as P, a, l are measured to do the regression analysis of fracture toughness that is obtained by SENB test on a notched sample.
     本研究借助Palmqvist裂纹系统半椭圆裂纹模型HV-KIC的计算公式,采用开微缺口的单边缺口粱试样的KIC和压痕硬度及系列压痕裂纹参数,经回归分析确定了该公式中的经验常数,使之能够较为准确地表征烧结NdFeB永磁合金的断裂韧性。
短句来源
  “裂纹系统”译为未确定词的双语例句
     Theoretical analysis is conducted on material deformation and crack formation during grinding process of nanostructured ceramics coatings.
     论文对纳米结构陶瓷涂层磨削过程的材料变形行为和裂纹系统进行了理论分析。
短句来源
     What the experiment observation and simulation analysis indicate are as follows: in the beginning of the life, initiation of collective short fatigue cracks is the main form of fatigue damage, which can be taken for equality.
     寿命后期疲劳损伤以裂纹扩展和合体为主要损伤形式,裂纹的扩展过程是多裂纹系统的演化过程,其中包含裂纹长度的演化、裂纹数量的演化及多裂纹间的相互作用等; 裂纹的萌生和扩展情况受载荷大小和试样缺口形状的影响,主、次疲劳裂纹的扩展速率呈现出较大的分散性。
短句来源
     The effective modulus of elastic body with distributed cracks combined with thecontinuum damage mechanics are firstly considered. The influence of the damage on material property is divided into two parts. One is the stress change,the other is the moduluschange.
     本文将连续损伤与裂纹系统弹性体的有效模量这两个分离的研究领域统一起来加以考虑,将损伤对材料性质的影响分成实际应力的变化和弹性常数的变化两部分,在Drucker公设基础上建立了损伤演化律和损伤本构模型。
短句来源
     Parameter domains analysis is significant for constructing the theoretical model of fatigue cracks system.
     疲劳裂纹系统的参数域分析对于建立系统的理论模型具有一定的指导意义 .
短句来源
     The final state of the fatigue cracks evolution is largely scatter that represented as random crack path and life scatter.
     疲劳裂纹系统的演化终态具有很大的分散性 ,主要表现为裂纹路径的随机性和突变寿命的分散性 .
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  相似匹配句对
     SYSTEM
     系统
短句来源
     system).
     系统)。
短句来源
     Ceramic products of flaw testing system research
     陶瓷制品裂纹检测系统的研究
短句来源
     Welding Cracking Prediction and Diagnosis Expert System
     焊接裂纹预测及诊断专家系统
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  crack system
Optimal design of a compound plate weakened by a periodic crack system
      
Numerical results for a two-crack system are presented and compared with those from finite element method (FEM).
      
On the problem of crack system with an elliptic hole
      
An exact solution of a four part mixed boundary value problem representing a three colinear crack system connected with specified crack opening displacements between the cracks is obtained.
      
First the kinetic energy and the strain energy of the crack system are obtained in analytic forms based on the displacement field of dynamic elastic analysis.
      
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In this paper, the thermodynamic equilibrium equation of crack body in the course

本文从对裂纹扩展过程中流变与耗散现象的大量观察与研究,根据非局部场理论,导出了裂纹体在裂纹扩展过程中的热力平衡方程,为更加精确地描述裂纹扩展问题提供了理论基础;同时指出,在裂扩展过程中局部质量、动量、动量矩和能量均不守恒,并给Griffith表面能以新的定义。将单支墩大头坝初始表面裂纹的形成与扩展视为不可逆热力学过程,在不可逆过程必然伴有熵产生的原则下,引入了一个耗散势函数,通过对裂纹扩展过程中Clausius非补偿热和耗散势函数的研究,重新建立了断裂判据;在适当地引入裂纹系统偏离平衡态的距离之后,可导出经典的屈服、强度和断裂理论中的各种判据;同时,通过耗散势函数,把流变、断裂和不可逆过程有机地结合起来了,形成了统一的流变断裂学。最后,将大坝混凝土定义为热流记忆性材料,依试验和实测数据,采用本文给出的热流变断裂学研究,对单支墩大头坝初始表面裂纹的形成进行了计算,其结果与现场观测基本一致,为单支墩大头坝的设计提供了进一步改进的依据。

The paper presents a principal formulation of statistical evolution of mic-rocracks, occurring in solids, subjected to external loading. In particular, the concept of ideal microcracks is elaborated, in order to describe the fundamental features of damage resulting from nucleation and extension of microcracks. Relevant average damage functions are also discussed.The paper presents a principal formulation of statistical evolution of mic-rocracks, occurring in solids, subjected to external loading. In particular,...

The paper presents a principal formulation of statistical evolution of mic-rocracks, occurring in solids, subjected to external loading. In particular, the concept of ideal microcracks is elaborated, in order to describe the fundamental features of damage resulting from nucleation and extension of microcracks. Relevant average damage functions are also discussed.The paper presents a principal formulation of statistical evolution of mic-rocracks, occurring in solids, subjected to external loading. In particular, the concept of ideal microcracks is elaborated, in order to describe the fundamental features of damage resulting from nucleation and extension of microcracks. Relevant average damage functions are also discussed.

本文建议了一种在外界载荷作用下,在固体中产生的微损伤的统计演化的理论描述方法。特别是,作为一个例子,讨论了理想微裂纹系统,以便了解在微裂纹成核和扩展过程中,损伤演化的基本行为。本文也简单讨论了有关的平均损伤函数。

Photoelastic experimental results show the distribution of stress in the rocksamples indented by single indenter.The theory of fracture mechanics is used to analyze thebasic regularity of crack propagation. The result shows that crack propagates ahead along the trace of compression and the distribution of cracks is related with the shape of indenterand the distribution of stress,and that increasing indenter load can make the crack system more complete,but can’t change evidently the regularity of crack...

Photoelastic experimental results show the distribution of stress in the rocksamples indented by single indenter.The theory of fracture mechanics is used to analyze thebasic regularity of crack propagation. The result shows that crack propagates ahead along the trace of compression and the distribution of cracks is related with the shape of indenterand the distribution of stress,and that increasing indenter load can make the crack system more complete,but can’t change evidently the regularity of crack propagation and crackdistribution.The indented rocks are cut off and observed to verify the above conclusion.

利用光弹实验分析单齿压入作用下岩石内部产上的应力场,根据断裂力学的理论分析了裂纹扩展的一些基本规律.得出裂纹沿压应力迹线的方向扩展的结论.整体裂纹的分布规律与齿形及应力场分布有关,提高压头的载荷可使裂纹系统发育更加完善,但不会改变裂纹扩展和分布规律,通过受压岩样切片观测.验证了上述结论.实验研究了四种齿形.以弧陵齿破岩效果最佳.

 
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