摘要
本文探索了采用失效评定图进行含类裂纹缺口结构完整性评定的工程方法。研究结果说明,缺口失效评定图提供了一个既简单又方便的弹塑性断裂分析,又能给出可能失效形式判断的工程失效评定方法。由于缺口失效评定图与缺口端部几何尺寸有弱相关性,可以利用R6第三版的裂纹体失效评定曲线作为缺口的失效评定曲线。采用失效评定图评定缺口结构完整性的关键是缺口断裂韧性J_A的获取,本文给出了估算缺口断裂韧性J_A的近似方法。
In this paper, an engineering method, the failure assessment diagram (FAD). for the assessment of the integrity of structures containing crack-like notches has been explored. The investigation carried out in the paper indicates that the notch FAD will be similar to the crack FAD, which should supply an engineering failure assessment method not only being simple and convenient but also giving the judgment of probable failure mode of notches. The notch FAD has weak dependency on the geometry of notch ends, therefore the crack FAD given in the third edition R6 report will also be used as the notch FAD. Furthermore, for the key to the utilization of the notch FAD is obtaining the notch fracture toughness, J_A. an approximate method for estimating notch fracture toughness, J_A, has been given in the paper.
出处
《压力容器》
1992年第1期34-39,共6页
Pressure Vessel Technology
