试验研究了裂纹扩展过程中超载载荷迟滞效应。
The hysteresis that was induced by overload was investigated experimentally.
提出了拉伸超载对疲劳裂纹扩展过程影响的一般机制。
A general mechanism of the effect of tensile overload on FCP behaviour is proposed.
这些结论都建立在理想的假设上，即实用应用力在裂纹扩展过程中不变。
Both of these statements are based on the tacit assumption that the applied stress does not change during the crack growth process.
并利用三维动态有限元模拟了点焊接头疲劳裂纹扩展过程中频率变化特性。
Then the characteristics of frequency variation during the fatigue crack propagation process are simulated by three - dimensional dynamic finite element analysis.
观察了在热应力作用下gjw35钢结硬质合金表面热疲劳裂纹扩展过程。
The process of thermal fatigue crack propagation on the surface of steel bonded carbide GJW35 under the action of thermal stress has been observed.
文摘：观察了在热应力作用下gjw35钢结硬质合金表面热疲劳裂纹扩展过程。
Abstract: the process of thermal fatigue crack propagation on the surface of steel bonded carbide GJW35 under the action of thermal stress has been observed.
给出了一种利用有限元技术模拟周期性张力载荷作用下孔边角裂纹扩展过程的方法。
A method is proposed to simulate the fatigue crack growth by finite element technique for corner cracks under cyclic tension loading.
利用透射电镜原位动态拉伸方法观察、分析氢对裂纹尖端塑性变形及裂纹扩展过程的影响。
The influence of hydrogen on the deformation ahead of crack tip and crack propagation were in-situ observed and analyzed under TEM during dynamic tensile deformation of engineering structure steel.
论述了非相变增韧陶瓷及纤维增韧陶瓷的室温及高温疲劳特性，重点介绍了循环载荷对疲劳裂纹扩展过程的影响。
The fatigue behavior of non-transferring toughened ceramics and fiber reinforced ceramics at ambient and elevated temperature was discussed in detail.
常规无损检测方法难以对构件内部短裂纹的启裂和扩展过程进行有效的监测。
Regular NDT (Nondestructive Testing) methods cannot monitor the initiation and expansion process of short cracks inside components effectively.
研究了A356铝合金在冲击载荷作用下的裂纹萌生及其扩展过程。
Crack initiation and propagation process in A356 aluminium alloy under impact load have been investigated.
将数字图像处理煤体表面得到的初始损伤参数引入所建立的模型中，得到了相应受力状态下的裂纹起裂、扩展破坏过程。
Introducing the initial damage parameters of coal surface obtained by digital image processing in model, got the failure process corresponding stress state under the crack initiation and expansion.
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。
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.
并对极限浓度及常温下介质浓度对裂纹扩展的动力学控制过程影响进行了讨论。
And the effect of limit concentration and concentration of the medium at normal temperature on the dynamic control process of crack propagation is also discussed.
由于岩石破碎过程非常复杂的，采用当前的动态断裂理论得出的裂纹扩展长度与实测值差异较大。
Because the process of rock broken is very complicated, there is a difference between the experimental data and theoretical result of expanding fissure by the present dynamic fracture theory.
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。
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.
通过TEM—SAD同步原位分析，给出了裂纹扩展和DF Z内晶面畸变的对应过程，通过分析衍射斑点的变化，确定出晶面的畸变有压缩、倾转和局部弯曲等形式。
Synchronized analyses on the process of crack propagation and the lattice plane distortion changing in the DFZ were carried out by using the in situ technique under TEM-SAD.
并用有限元分析结果解释了一个实际产品——卡车用橡胶垫在疲劳实验过程中裂纹扩展的情况。
The situation of crack growth for a real component, rubber pad used in turck, during fatigue testing were explained.
计算过程极简单而迅速，因此特别适用于疲劳裂纹扩展分析。
This procedure is rather simple and fast, so it is specially suitable for use in the analysis of fatigue crack development.
许多工程结构在服役过程中受到随机载荷的作用，载荷循环之间的相互作用对裂纹扩展将产生明显的影响。
Many engineering structures are subjected to random loading in service. The load cycle interactions can have a very significant effect in fatigue crack growth under variable amplitude loading.
多裂纹体的裂缝扩展研究为重力式碾压混凝土坝仿真破坏过程研究提供了条件。
Study on the propagation of cracks in multi-cracked body leads to a good method for studying the actual simulated gradual destroy process of roller compacted concrete dam.
为了模拟重力坝在强震作用下的破坏过程，利用扩展有限元框架下的分离裂纹模型描述混凝土中的裂纹扩展。
A discrete crack model based on the extended finite element method (XFEM) was used to describe the nonlinear fracture of concrete gravity DAMS during earthquakes.
这种等应力试样在研究弯曲疲劳，尤其是在弯曲条件下研究疲劳过程中裂纹产生和扩展机理时，将显示出明显的优越性。
The superiority of this design over the conventional one will reveal itself in the studies on the mechanisms of crack initiation and growth in fatigue process under bending condition.
目的探索骨组织在微动过程中裂纹产生和扩展的原因及过程，弄清假体-骨组织界面微动磨损的机理。
Objective To investigate the cause and process of crack generation and propagation in fretting wear of bone and to study the fretting wear mechanism between prostheses and bones.
用扫描电子显微镜及微拉伸台对奥氏体- 贝氏体球墨铸铁裂纹萌生、扩展的微观过程进行了跟踪观察。
The micro process of crack initiation and propagation in austempered ductile iron has been investigated by scanning electron microscope with a micro tensile stage.
对塑性变形过程、裂纹的萌生和扩展过程以及冲击过程的声发射特点及其内部成因也做了深入的分析。
In the process of plastic deformation, crack initiation and growth, and impact, the characteristics of acoustic emission (AE) signals and the factors that affect them are also elaborately discussed.
在此基础上提出的裂纹扩展失效概率分析方法，能考虑夹杂空间位置随机性及扩展过程中的裂纹合并情况。
Based on the model, a failure probability analysis method of crack growth is presented which takes the randomness of inclusions' position into consideration.
即裂纹源产生于快速加热过程并在随后的快速冷却中得以扩展。
It is pointed out that the source of crack is formed during the fast heating process and expanded following the fast cooling process.
本文运用伤力学和断裂力学理论，从能量的角度对结构性土体裂纹扩展进行了全过程分析。
The whole flaw development process of earth body in structure is analyzed according to the theory of damage mechanics and fracture mechanics from the view point of energy.
本文运用伤力学和断裂力学理论，从能量的角度对结构性土体裂纹扩展进行了全过程分析。
The whole flaw development process of earth body in structure is analyzed according to the theory of damage mechanics and fracture mechanics from the view point of energy.
应用推荐