大きな圧縮予歪を受けた鋼構造部材の強度・切欠き靭性

概要

論文の詳細を見る
When buckling collapse takes place in structural steel members, large compressive strain deteriorates the ductility and fracture toughness of the material at the concave side of buckling deflection. Therefore cracks may easily initiate and propagate at the concave (compressive) side of buckling deflection. In this paper, in order to quantify the deteriorating effect of the large compressive strain on the mechanical properties and notch toughness of steels, a series of tensile tests and V-notched Charpy impact tests were performed on three kinds of steels (490MPa-class high tensile steel plates). As a result of the investigations described above, the following conclusions were obtained: (1) Although the elongation becomes lower overall due to the compressive prestrain, the elongation decreases extremely within the compressive prestrain up to -20%, and then tends to be the constant approximately. While the effect of the compressive prestrain on the reduction of area seems smaller than that on the elongation. (2) Both the yield stress and the tensile strength increase with increasing the compressive prestrain. Regardless of the kinds of the steels, the rates of the increases of the yield stress and the tensile strength against the virgin are about the same. (3) vTrE (≒vTrS) increases with increasing the compressive prestrain. The increases of vTrE (≒vTrS) of three kinds of steels are about the same. (4) The equations to be able to estimate the yield stress, tensile strength and vTrE (≒vTrS) of the steels experienced large compressive prestrain are obtained.
社団法人日本船舶海洋工学会の論文
2000-09-04

大きな圧縮予歪を受けた鋼構造部材の強度・切欠き靭性

スポンサーリンク

概要

著者

関連論文

スポンサーリンク