1) critical crack
临界裂纹
1.
The determination of critical crack size is the key point in fracture dynamics,but this is certainly difficult for low-carbon steel.
断裂动力学中的临界裂纹确定是一个关键问题 ,而低碳钢的临界裂纹确定有一定难度。
2.
The evaluation results indicate that because the full-thickness corrosion crack on the tube wall was longer than the critical crack corresponding to the working stress from fatigue load spectrum,the unstable crack propagation was caused.
根据某机平尾大轴在做疲劳试验时突然发生完全断裂,究其原因进行了损伤容限评定分析,并得出了分析结论:由于管壁腐蚀穿透裂纹已大于疲劳载荷谱工作应力所对应的临界裂纹长度,因此裂纹产生了不稳定扩展,换句话说,也就是疲劳载荷谱工作应力已大于腐蚀裂纹长度所对应的剩余强度要求值,因此导致了该大轴突然发生快速断裂。
3.
Aim To study the critical crack and initial permissible crack size of gun tube.
目的 研究火炮身管的临界裂纹和初始允许裂纹尺寸 。
2) subcritical crack
亚临界裂纹
1.
The subcritical crack growth mechanism in brittle materials is studied from the viewpoint of mesomechanics.
本文从细观力学角度研究了高脆性材料亚临界裂纹扩展机制。
3) subcritical crack growth
亚临界裂纹扩展
1.
Testing study of subcritical crack growth of ore in Jinchuan mine;
金川矿岩亚临界裂纹扩展试验研究
2.
Study on subcritical crack growth and thresholds of rocks;
岩石亚临界裂纹扩展试验及门槛值研究
3.
Effects of water on subcritical crack growth;
水对亚临界裂纹扩展的影响
4) critical crack size
临界裂纹尺寸
1.
The article researched critical stress intensity of 4130X steels in high concentration and medium concentration hydrogen sulfide corrosion environment and presented critical crack size of compressed natural gas vessel in these two environments.
以压缩天然气气瓶用钢 4 130X钢为材料 ,实测了高浓度和中等浓度硫化氢腐蚀溶液中材料的临界应力强度因子 ,得出压缩天然气气瓶在高浓度和中等浓度硫化氢溶液中的临界裂纹尺寸 ,为保证压缩天然气气瓶安全运行进行的裂纹评定提供了实验依据。
2.
Combining theory of fracture mechanics,formulas of critical crack size of mode Ⅰ-Ⅲ crack fracture is deduced.
利用ANSYS软件分析了在役隔离开关支柱瓷瓶承受的拉应力、剪应力情况,得到上下元件瓷体部分危险区域的最大应力值;结合工程断裂力学理论,推导出计算Ⅰ-Ⅲ混合型裂纹的临界裂纹尺寸公式,结合裂纹形状因子,给出隔离开关支柱瓷瓶检测灵敏度的理论依据。
3.
The critical crack sizes of different materials in H_2S environment were thus figured out,and the curves with working pressures and equivalent stress to critical crack size were plotted.
由此确定了不同材料在不同环境溶液中的临界裂纹尺寸,得到了气瓶工作压力及等效应力与临界裂纹尺寸的关系曲线。
5) critical crack length
临界裂纹长度
6) critical crack extension force
临界裂纹扩展力
1.
A fractal model of critical crack extension force is proposed to indicate that the fractal dimension of a fractured surface is incompatible with the elastic fracture mechanics.
本文给出了一个描述临界裂纹扩展力的分形模型。
2.
This paper presents fractal descriptions of critical crack extension force,crackbranching and crack propagation speed.
给出了临界裂纹扩展力、裂纹分叉和裂纹扩展速率的分形描述，讨论了断口分形维数测量中的有关问题。
补充资料：亚临界裂纹扩展
分子式：
CAS号：
性质：材料内部的微裂纹在达到临界快速失稳扩展条件之前的缓慢扩展过程。各种裂纹如疲劳裂纹、应力腐蚀裂纹、氢脆裂纹等的发展通常都经历这一阶段。可以通过降低外加应力、减缓腐蚀速度等方法阻碍裂纹的亚临界扩展,从而延长材料寿命。
CAS号：
性质：材料内部的微裂纹在达到临界快速失稳扩展条件之前的缓慢扩展过程。各种裂纹如疲劳裂纹、应力腐蚀裂纹、氢脆裂纹等的发展通常都经历这一阶段。可以通过降低外加应力、减缓腐蚀速度等方法阻碍裂纹的亚临界扩展,从而延长材料寿命。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条