裂纹

This paper presents the principle and method for determining stress intensity factor Km from photoelastic test data.

本文提出了用光弹数据确定应力强度因子K_Ⅲ的原理和方法，进行了带径向贯穿裂纹的纯扭轴的典型实验，得到K_Ⅲ实验值与精确计算解偏差在8％以内。

According to the need in evaluation of the crack in structure, the author of this paper developed a new system based of photoelastic mechanics and digital image proccessing , which is specialy used to measure the length and width of crack.

本文针对工程结构开裂评估的需求，运用光测力学原理与近年间迅速发展起来的图像处理新技术，研究开发了一套&像素法&裂纹长度和宽度参数测定的新系统。

By using SEM,EDAX and metallographic techniques,it was found that the anodic polarization weakened the effect of nitrogen on SCC behavior of the du- plex stainless steel.

在开路电位下，α、γ相均对裂纹的发展起阻止作用；在较低的阳极极化电位下。

Polythionic acids stress corrosion crack occurred in flange of furnace pipe in hydrogen reformer after it had been used for two years.

对制氢炉管下法兰在使用2 a后出现裂纹的原因进行了综合分析，结果表明，①该法兰选材不当。

The observation of the metallographic structure of the cracks and analysis of the corrosion product determines that culprit of the cracking is polythionic acid stress corrosion.

中国石化股份有限公司天津分公司加氢精制高压分离器接管使用8个月后相继发生开裂，经裂纹金相组织形态观察和腐蚀产物成分分析，确定开裂原因系连多硫酸应力腐蚀引起。

Combining the general situation of Jintang bridge engineering,it is used the pier body to preconceal bere and bracket for bridge s construction,and according to bridge s character with a high beam and large area of concretes.

结合金塘大桥工程概况，采用墩身预埋贝雷托架施工，并针对本身梁高混凝土方量大的特点，合理地采取分层二次浇筑，对人洞可能产生的裂纹采取有效的预防措施，并在施工过程中进行了严密的观测和监控，确保支架的安全和箱梁成品质量。

There existed very significant positive correlations among the fruit cracking rate, cracking index and the contents of souble solids,total sugar,deoxidize sugar,fructose and sucrose and the activities of PPO,PAL;and very significant negative correlation among the fruit cracking rate,cracking index and the contents of protopectin and Ca.

果面碎裂裂果率、果面碎裂裂纹指数同苹果果实的可溶性固形物、总糖、还原糖、果糖、蔗糖均呈极显著的正相关；同PPO、PAL的酶活性也呈极显著的正相关；与果皮的果胶含量、Ca含量呈极显著的负相关。

In electricity plus thermal group, the pathologic alterations were slighter than model group; there was little crack on the surface of cartilage, with intact collagen fiber structure and less pyknotic chondrocytes. Although some chondrocytes shrank, there were intact cell organs in many chondrocytes even chondrocyte cluster in some regions.

疏密波+热软膜组在病理程度上的改变明显轻于模型对照组，软骨表面裂纹少，胶原纤维结构基本完整，固缩的软骨细胞少，虽可见部分退变的软骨细胞，但部分软骨细胞具有较多的细胞器，某些区域形成软骨细胞簇。

The microstructure and thermal physical properties of the surface reactional layer determine the range of strength improvement.Stress relaxation was benifical for strength,but the oxidation-induced bubbles and crack weaken the specimens.

热处理引起的应力松弛也有利于材料强度的提高，但氧化过程中产生的表面气孔及冷却过程中产生的表面微裂纹会引起材料强度的下降。

The effect of remanet polarization on electro-mechanical fields in ferroelectric ceramics with a flaw has been investigated. Two types of flaw, i.e. an elliptical cavity and a line crack, have been studied in terms of the exact boundary conditions.

二、首次考察了剩余极化对含缺陷的铁电材料力电场的影响，分椭圆孔和裂纹两种情况，并采用精确边界条件进行了求解。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。