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Measurement of the near-tip displacement field in a fatigue damaged steel plate by digital speckle pattern interferometry |
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| Authors: | F V Díaz G H Kaufmann A F Armas O Mller |
| Institution: | a Instituto de Física Rosario (CONICET-UNR) 2000 Rosario, Argentina b Departamento de Física, Facultad de Ciencias Exactas, Ingeniería y Agrimensura, Universidad Nacional de Rosario, 2000 Rosario, Argentina c Instituto de Mecánica Aplicada y Estructuras, Facultad de Ciencias Exactas, Ingeniería y Agrimensura, Universidad Nacional de Rosario, 2000 Rosario, Argentina |
| Abstract: | A digital speckle pattern interferometry system with automatic data analysis is used to measure the near-tip in-plane displacement field in a stainless steel specimen previously cracked by a fatigue test. In-plane displacements over a zone of 3.15 mm×3.15 mm are determined through the evaluation of the optical phase distribution. A theoretical solution developed for elasto-plastic materials is used to evaluate the obtained experimental results. |
| Keywords: | Digital speckle pattern interferometry Crack tip Fatigue |
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