中靱性材料からなる圧力配管の LBB の成立性と限界き裂長さ

概要

論文の詳細を見る
The fracture behaviors of part-through and through-wall cracked pipes were analyzed using elastic-plastic fracture mechanics. The objective is to establish codes and standards for evaluating axially oriented part-through-wall cracks in pipes made of moderately tough materials and subjected to internal pressure. The conditions for leak before break (LBB) of these pipes were estimated. The crack geometry satisfying the LBB conditions was also analyzed and it was found that they are independent of the pipe geometry and mechanical properties. The critical crack length for pressurized pipe was derived based on a unique parameter for elastic-plastic fracture mechanics. Application of this parameter to high-toughness materials compares favorably with existing experimental results.
社団法人日本機械学会の論文
2001-10-25