A Study of Fatigue Crack Propagation in a Glassy Polymer by the Optical Method of Caustics
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概要
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Using the shadow optical method of caustics, experimental evaluation of the stress intensity factor K_I was carried out for poly (methyl methacrylate) (PMMA) during the course of fatigue cracking at frequencies of 1 and 0.1 Hz. A critical comparative study was made of K_I values obtained experimentally by the caustic method (CM) and those deduced theoretically from linear fracture mechanics (LFM) at various rates of fatigue crack propagation (FCP). The relationship between △K_I and the FCP rate yielded two clear segmented curves in evaluations by both LFM and CM, results which are supported by fracture surface examination. When K_<Imax> was related to the FCP, good agreement was obtained for the data from both methods, while noticeable differences were recognized in the relation △K_I or K_<Imax> vs. FCP. The effect of the test frequency is also shown in the relations.
- 一般社団法人日本機械学会の論文
- 1994-10-15
著者
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Takahashi Kiyoshi
Fuji Bio Co. Ltd.
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Takahashi K
Research Institute For Applied Mechanics Kyushu University
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TAKAHASHI Kiyoshi
Research Institute for Applied Mechanics, Kyushu University
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Abo-El-Ezz Elsayed
Force Calibration and Material Testing Division, National Institute for Standards
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Abd-El-Hakeem Mohamed
Force Calibration and Material Testing Division, National Institute for Standards
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Takahashi Kiyoshi
Research Institute For Applied Mechanics Kyushu University
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Abd-el-hakeem Mohamed
Force Calibration And Material Testing Division National Institute For Standards
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Abo-el-ezz Elsayed
Force Calibration And Material Testing Division National Institute For Standards
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