precrack

1.A high K ratio method for fatigue precracking in welding position toughness specimen of thick steel plate was developed.

提出了预制厚钢板焊缝断裂韧度试样疲劳裂纹的“高K比法”。

2.In this paper .bridge-indentation method is adopted to precrack in ceramic specimens, and the advantage as well as disadvantage are discussed.

本文首先对桥压法预制原生裂纹进行了研究,然针对桥压法存在的问题提出了一种简便而有效的陶瓷材料原生裂纹的预制方法——静态膨胀法。