異なる強度レベルの材料に対する破壊評価線図の適用性

概要

論文の詳細を見る
The applicability of the latest CEGB R6 approach (the two-parameter approach) to fine kinds of metallic materials having various strength levels from high to low was examined. The construction of a new failure assessment diagram (FAD) was also attempted. The results obtained are summarized as follows: (1) Based on the FAD of the latest CEGB R6 approach, it was shown that various types of fractures from the linear-elastic fracture to the plastic collapse, including the stable crack growth of the elastic-plastic fracture, were predicted precisely for the five materials. (2) The applicability of the failure assessment curves (FAC) in the R6 approach was quite different for each material. Option 1 FAC did not give a conservative prediction for all the materials. Option 3 FAC did not have a high accuracy for some of the materials. (3) Based on the results obtained, Option 1 FAC was modified and a new FAC was proposed. (4) It was shown that the applicable range of each fracture criterion could be evaluated exactly on the new FAD incorporating the ASME screening criteria.
社団法人日本機械学会の論文
1990-05-25