2003 電子スペックルパターン干渉法を用いた破壊靭性値測定に関する研究(G03-1 測定・検出・評価技術(1),G03 材料力学)

概要

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In this study, a plastic zone at a crack tip vicinity of specimens was visualized with electronic speckle pattern interferometry (ESPI). And dynamic fracture toughness value of a specimen with a crack was easily obtained by measuring the visualized plastic zone dimension. It was found by previous our research to be able to obtain the dimension of plastic zone at crack tip vicinity in statically and to decide the fracture toughness value by using the dimension. In this report, ESPI was applied to the dynamic fracture toughness test, and the result was shown. Then preliminary experiments using a new visualization method with ESPI to observe the plastic zone have been employed and the result is also presented. Additionally, a new Measuring method of fracture toughness value is showed in this paper.
2007-09-07