2026-03-06T21:27:27Z https://gunma-u.repo.nii.ac.jp/oai

oai:gunma-u.repo.nii.ac.jp:00003069 2023-06-19T13:12:50Z 572:575:576

引張破断のき裂進展速度に及ぼす各種因子の影響 The Effect of Various Factors on the Crack Propagation Speed in Tensile Fracture The Effect of Various Factors on the Crack Propagation Speed in Tensile Fracture 神宮, 利夫 永倉, 和郎 根津, 紀久雄 坂本, 賢治 日本機械学会 本文データは学協会の許諾に基づきCiNiiから複製したものである Tensile Fracture Crack Propagation Speed Ductile Unstable Fracture Load Rate Stress Intensity Factor Strain Hardening Area Contraction application/pdf Journal Article Since the tensile fracture is governed by the load rate, the unstable crack fracture must be observed under the condition in which the load rate is smaller than crack speed. In this paper, the time-dependent stress caused by the compression wave emanated from the rupture section of a notched round bar is observed by the strain gauge method, while the problem of the same condition is theoretically analysed by postulating the crack growth models. The crack speed is determined from a comparison of the experimental result with theoretical result. Furthermore, the present paper experimentally distinguishes the effect of various factors, load rate and stress intensity factor, strain hardening, and area contraction of the material on the crack speed in tensile fracture, and suggests the experimental condition in observing the unstable crack fracture by the tensile test. 日本機械学会 1990-06-25 2017-03-27 jpn journal article VoR http://hdl.handle.net/10087/2463 https://gunma-u.repo.nii.ac.jp/records/3069 http://ci.nii.ac.jp/naid/110002373141/ 0387-5008 AN0018742X 日本機械学會論文集. A編 56 526 1406 1410 https://gunma-u.repo.nii.ac.jp/record/3069/files/A56_1406.pdf application/pdf 388.4 kB 2020-11-25