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Title :ひずみゲージを用いた疲労き裂開閉口点の測定法について
Title alternative :A Measurement Method of Crack Tip Opening and Closing in Fatigue by Means of Strain Gauge
Authors :真壁, 朝敏
兼城, 英夫
糸数, 真哉
屋富祖, 建樹
Authors alternative :Makabe, Chobin
Kaneshiro, Hideo
Itokazu, Masaya
Yafuso, Tateki
Issue Date :25-Jun-1990
Abstract :Effective stress intensity factor range ΔK_<eff> and the J integral range ΔJ which are determined by the crack tip opening or closing point are considered as the likely parameters controling crack propagation behavior. Therefore, a development of the simple measurement method of crack tip opening and closing is considered to be important for the evaluation of crack propagation. In this study, for an elastic-plastic condition in a center-cracked plate, it is proposed that the crack tip opening and closing point can be simply determined with the σ-(ε_y-α)/(ε_x+α) diagram and σ-ε_y diagram, where σ is the cyclic stress, ε_y and ε_x are the strains measured in the vicinity of the crack center by means of a strain gauge and a is a constant value. Then this measurement method is compared with results obtained by finite element method calculations.
Type Local :雑誌掲載論文
ISSN :03875008
Publisher :日本機械学会
URI :http://hdl.handle.net/20.500.12000/214
Citation :日本機械学会論文集. A編 = Transactions of the Japan Society of Mechanical Engineers. A Vol.56 no.526 p.36 -41
Appears in Collections:Peer-reviewed Journal Articles (Faculty of Engineering)

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