21413 電子スペックルパターン干渉法を用いた破壊靭性値の非接触測定に関する研究(一般講演破壊靭性)

概要

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Fracture toughness represents material's resistance to fracture, and is an important index for safety management of structural materials. However, because of various experimental difficulties such as difficulty in accurate measurement of dynamic loads and detection of the onset load of fracture, a method to evaluate fracture toughness under dynamic loading has not been established. It is essential to develop an experimental method capable of evaluating dynamic stress intensity factor accurately. In this study, we proposed a convenient method to evaluate dynamic fracture toughness, and demonstrated its validity. This method is based on an optical interferometric technique known as the electronic speckle pattern interferometry (ESPI), and able to detect small deformation in a noncontact fashion. In this presentation, we will report results of experiments on this ESPI based method.
一般社団法人日本機械学会の論文
2010-03-09