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Fatigue damage accumulation around a notch using a digital image measurement system |
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| Authors: | F V Díaz A F Armas G H Kaufmann G E Galizzi |
| Institution: | (1) Instituto de Física Rosario (CONICET-UNR), Bvd. 27 de Febrero 210 bis, S2000EZP Rosario, Argentina;(2) Instituto de Física Rosario (CONICET-UNR), Bvd. 27 de Febrero 210 bis, S2000EZP Rosario, Argentina;(3) Departmento de Física, Facultad de Ciencias Exactas, Ingeniería y Agrimensura, Universidad Nacional de Rosarid, S2000PTB Rosario, Argentina |
| Abstract: | A digital image measurement (DIM) system is used to study the plastic damage accumulation around a notch under conditions of low-cycle fatigue. This system incorporates a contrast correlation method to evaluation the level of plastic damage at each point of the studied area from two images acquired before and after the introduction of fatigue deformation. A compact tension specimen of 304 stainless steel with a notch radius of 1 mm is analyzed during the stages of fatigue crack initiation and growth. The results obtained using this measurement system are compared with those attained by means of a recrytallization technique. |
| Keywords: | Digital image measurement plastic damage low-cycle fatigue |
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