引張り曲げを受ける表面切欠からの脆性破壊発生特性(第一報)

概要

論文の詳細を見る
In large welded structures such as ships, pressure vesseles, etc., the initial imperfections including misalignments and angular distortions are inevitable in course of assembling and welding workman-ship. Some of such initial imperfections are liable to produce unexpectedly high local stresses especially due to bending. The authors have investigated experimentally as well as analytically the effect of out-of-plane bending on brittle fracture initiation from a surface flaw, using surface notched plate specimens subjected to eccntric tension spcifically designed for the present purpose. As an analytical tool, the approximate elastic analysis of a surface crack developed by J.R. Rice et al. was utilized on its strain basis and the experimental results were discussed in terms of the COD concept. This report gives a proposal on an engineering method to apply the COD concept to the critical assessment of a surface flaw under combined tension and bending on the basis of critical COD data obtained from the conventional COD testings.