Limit loads and fracture mechanics parameters for thick-walled pipes

作者：Kim Nak Hyun; Oh Chang Sik; Kim Yun Jae^*; Kim Jong Sung; Jerng Dong Wook; Budden Peter J

来源：International Journal of Pressure Vessels and Piping, 2011, 88(10): 403-414.

DOI：10.1016/j.ijpvp.2011.07.005

• Crack opening displacement
• J-integral estimates
• Limit load
• Stress intensity factor
• Thick-walled pipe

In this paper, information on plastic limit loads and both elastic and elastic-plastic fracture mechanics parameters is given for cracked thick-walled pipes with mean radius-to-thickness ratios ranging from two to five. It is found that existing limit load expressions for thin-walled pipes can be applied to thick-walled pipes, provided that they are normalized with respect to the corresponding un-cracked thick-walled pipe values. For elastic fracture mechanics parameters, FE values of the influence functions for the stress intensity factor and the crack opening displacement are tabulated. For elastic-plastic J, it is shown that existing reference stress based J estimates can be applied, provided that a proper limit load for thick-walled pipes is used.

• 出版日期2011-10