论文部分内容阅读
本文通过宽板拉伸试验,根据全面屈服准则和COD参量直接研完和评定了焊接构件中的表面裂纹。指出依据COD概念不能合理地评定和保证具有表面裂纹构件的安全性,而全面屈服准则是评定构件表面缺陷的有力工具。因为他不但保证构件具有不低于屈服限的强度,而且还具有良好的塑性。本文同时还详细地讨论了低温对表面裂纹极限尺寸的影响,
In this paper, through the wide-plate tensile test, the surface cracks in the welded components are directly finished and evaluated according to the comprehensive yield criterion and COD parameters. It is pointed out that the concept of COD can not reasonably assess and guarantee the safety of the members with surface cracks according to the concept of COD, and the comprehensive yield criterion is a powerful tool to evaluate the surface defects of components. Because he not only ensures that the member has strength not less than the yield strength, but also has good ductility. This article also discussed in detail the impact of low temperature on the ultimate surface crack size,