fcpr meaning in Chinese
疲劳裂纹扩展速度
Examples
- Studies on the fatigue crack propagation rate ( fcpr ) indicate that load ratio ( r ) has a great effect on the fcpr : the greater load ratio is , the higher the fcpr becomes , and the lower kth shows . compared with load ratio , the thickness of the specimen has a lower effect on the fcpr
对镁合金的疲劳裂纹扩展特性的研究表明：载荷比r对镁合金az91 ， am50裂纹扩展行为具有很大的影响。 r值越大，裂纹扩展速率越高，疲劳门槛值k _ ( th )越小；试样厚度t对镁合金az91 、 am50稳态裂纹扩展速率的影响没有r值那么明显。 - Based on investigating a large amount of documents , the fatigue crack propagation behavior of mg alloys am50 & az91 is studied in this paper , as well as the tensile mechanical properties at elevated temperature . micro - mechanics of tensile deformation and the fcpr are also investigated by sem & tem
本文在查阅大量相关文献基础上，对az91 、 am50镁合金的疲劳裂纹扩展特性和高温拉伸力学性能进行了一定的研究。借助于扫描电镜和透射电子显微镜，分析了拉伸变形和疲劳断裂的微观机制。 - There is a slight drop of the fcpr when the specimen s thickness increases . however , the thickness of the specimen exerts a great influence on kth and fatigue life ( n ) : the thicker specimen is , the higher fatigue life ( n ) becomes , and the greater kth shows . under control of the same conditions , the fcpr of am50 is not so high as that of az91 . there are some correlations between load ratio ( r ) and the fatigue surface : when load ratio becomes great , small flat surfaces increase while dimples decrease
试样厚度增大，稳态裂纹扩展速率略有减小。但是，试样厚度影响试样的疲劳寿命和门槛值：试样越厚，疲劳寿命越长，门槛值越大；在试样尺寸和加载条件相同的情况下， am50的疲劳裂纹扩展速率较az91小，疲劳寿命则比az91长。载荷比r影响试样的断口形貌：载荷比r越大，对应相同k值出的断口小平面越多，韧窝越少。