The national standard of GB 1555B. 1 "Buried Polyethylene (PE) Piping Systems for the Supply of Gaseous Fuels Part 1: Pipes" of version 2003 and version 1995 were compared in this paper.
3
得到了快速扩展裂纹的动态应力强度因子。
Finally, the dynamic stress intensity factors of the fast-propagating crack is obtained.