http://ir.lib.muroran-it.ac.jp/dspace/handle/10258/16 機械システム工学科 チャンネルの検索 検索 http://ir.lib.muroran-it.ac.jp/dspace/simple-search http://ir.lib.muroran-it.ac.jp/dspace/handle/10258/348 タイトル: 地域で行う自然エネルギー開発プロジェクト : 街中で唄う"雪山賛歌"計画<br/><br/>著者: 媚山, 政良 http://ir.lib.muroran-it.ac.jp/dspace/handle/10258/295 タイトル: 高張力鋼板のレーザー溶接継手の衝撃引張特性に及ぼす予疲労の影響<br/><br/>著者: 津田, 紘; 臺丸谷, 政志; 小林, 秀敏; 砂山, 良彦<br/><br/>抄録: In this research, the effect of pre-fatigue on the impact tensile properties of the laser welded butt joint of high strength steel plates with tensile strength levels of 590MPa and 780MPa (denoted by HR590 and HR780, respectively) were investigated by the split Hopkinson bar apparatus. Quasi-static tensile tests were also performed to examine the effect of strain rate on the strength and the elongation. It was found that the effect of pre-fatigue on the tensile strength of welded butt joints is quite small if the applied stress in the pre-fatigue is less than the apparent yield stress of the welded butt joints. In the results of impact tensile tests for the welded butt joint of HR780 steel, however, the fracture strain of the specimens subjected to high cycle pre-fatigue was smaller than that of the virgin specimens. This may be caused by interaction of a number of cracks introduced by pre-fatigue with high strain rate. http://ir.lib.muroran-it.ac.jp/dspace/handle/10258/294 タイトル: 自動車用高張力鋼板の溶接継手の衝撃引張り特性に及ぼす予疲労の影響<br/><br/>著者: 津田, 紘; 臺丸谷, 政志; 小林, 秀敏<br/><br/>抄録: In this research, the effect of pre-fatigue on the impact tensile properties of the welded butt joint of high strength steel plates, HR590 and HR780, was investigated by means of the split Hopkinson bar method for tensile test. For comparison, quasi-static tensile tests were also performed to examine the effect of strain rate on the strength and the elongation. It was found that the effect of pre-fatigue on the tensile strength of welded butt joints is quite small if the applied stress in the pre-fatigue is less than the apparent yield stress of the welded butt joints. In the results of quasistatic and impact tensile tests for the welded butt joint of HR780 steel, however, the fracture strain of the specimens subjected to high cycle pre-fatigue was larger than that of the virgin specimens. This may be caused by the increase in hardness due to pre-fatigue observed in the weld zone of the joints. http://ir.lib.muroran-it.ac.jp/dspace/handle/10258/282 タイトル: リサイクル型超耐水段ボールの衝撃圧縮試験<br/><br/>著者: 小林, 秀敏; 臺丸谷, 政志; 田中, 健一; 櫻田, 浩司 http://ir.lib.muroran-it.ac.jp/dspace/handle/10258/281 タイトル: コンクリート材の衝撃引張り強度とひずみ速度依存性<br/><br/>著者: 臺丸谷, 政志; 小林, 秀敏; 志澤, 秀康