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By comparing fatigue crack with electrosparking crack, the effects of crack tip on fracture toughness of ductile iron have been studied. 通过开疲劳裂纹和线切割裂纹的对比试验，研究裂纹尖端的尖锐程度对球墨铸铁断裂韧性的影响；
This thesis provides a new method to measure the opening loading of fatigue crack That using ultrasonic testing detects echo of crack tip is similar result to general method for use strain gage. 本文也提供了另一量测开口荷重的方法，利用超音波检测技术，将它应用于疲劳裂缝开口荷重的量测，从量测的结果可发现荷重与裂缝尖端的回波变化与一般量测开口荷重的方法有相似的结果。
FATIGUE CRACK TIP CLOSURE AT NEARTHRESHOLD AND INFLUENCE FACTORS 临近门槛值时疲劳裂纹尖端的闭合及其影响因素
Keywords Thermal fatigue crack Pulse current Crack tip passivation Batten martensite; 热疲劳裂纹;脉冲电流;裂尖钝化;板条马氏体;
Keywords metallic material, ceramics, PMMA glass, expression for fatigue crack propagation （FCP）, Young's modulus, FCP threshold,fracture toughness, crack tip blunting; 金属材料;高分子材料;陶瓷材料;疲劳裂纹扩展速率表达式;断裂;弹性模量;疲劳裂纹扩展门槛值;断裂韧性;裂尖钝化;
fatigue crack tip 疲劳裂纹尖端
Secondary crack, reared ridge, and microcrack in the front of the main crack tip can all hinder crack propagation during low cycle fatigue. 撕裂棱、裂纹前端微裂纹的桥接等因素是阻滞主裂纹扩展的主要机制。
In this development only a single crack tip has been considered. 在这个研究中只是考虑了单个裂纹尖端。
They also noted "scattering zone" was very near to the crack tip. 它们还表明：“离散区”非常接近裂纹顶端。
Note that these contours do not encompass the crack tip. 注意这些围道，都不包含裂信尖端。
Perianth cylinder form, 4 tine crack tip, petaline shape. 花被圆筒形,先端四齿裂,花瓣状。
The flaking do increases and undulates the fatigue crack growth rate. 钢中的白点能增加疲劳扩展速率并使扩展速率发生波动。
In the tie girder boxes crack growth was detected near the crack tip. 在系杆箱型梁中裂纹尖端附近检测到裂纹的扩展。
The fractography of the fatigue crack initiation displayed cleavage f... 裂纹形成的断裂为穿晶解理机制,预应变可导致更多的二次裂纹。
A notched specimen is designed to simulate the corrosion reaction at crack tip. 为此,文中设计了一种新颖的缺口试样,再现裂纹尖端的真实状态。
No evidence of fatigue crack extension was detected in the silver Memorial Bridge nor the Fremont Bridge. 在西尔费纪念桥和弗里蒙特桥都没有检查出疲劳裂纹扩展的证据。
N. Shlyannikov, Z.B. Kuang, F.P. Yang (2004), Surface fatigue crack growth behavior, Russian journal Power Engineering Problems. 杨凤鹏，林卓英(2004)，表面裂纹疲劳扩展的试验，北京科技大学学报.
The behaviours of fracture, fatigue and fatigue crack propagation in a cast magnesium alloy are systematically studied. 本文系统地研究了铸造镁合金的断裂;疲劳和疲劳裂纹扩展性能.
The ground area was also checked with dye-penetrant to ensure that no crack tip remained. 打磨区也用着色渗透剂进行了检查，以便确保无裂纹尖端留存。
The failure forms of cold work roll including contact fatigue crack, spalling, inclusion crack and wear are discussed. 讨论了冷轧工作辊接触疲劳裂纹、剥落、夹杂物裂纹和磨损等失效形式。