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Vol.1, No2, 2001,
pp. 91-96 |
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EVALUATION OF FRACTURE MECHANICS PARAMETERS FOR SURFACE CRACKS BY APPLICATION OF LINE SPRING MODEL Vujadin Aleksić 1 Aleksandar Sedmak 2 Miodrag Arsić 1 Zlatan.Milutinović 1 1 GOŠA Institute, M. Rakića 35, Belgrade 2 Faculty of Mechanical Engineering, 27. marta 80, Belgrade |
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Abstract Evaluation of fracture mechanics parameters for surface cracks using line spring model has been shown. King's method for crack mouth and tip displacement evaluation was applied, on basis of what the J integral for perfectly plastic materials was determined. Some problems in application of King's method are pointed out, as well as possible modifications of this method for their solution. Possibilities to solve the problems such as residual stresses and geometry imperfections, which can significantly affect welded joint behaviour, are also introduced and analysed. Keywords: line spring model, surface cracks, Dugdale's model, crack driving force |
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full article - only in Serbian (581 kB)
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