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ISSN Print: 1543-1649
ISSN Online: 1940-4352
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DIGITAL IMAGE CORRELATION TRACKING AND GURSON-TVERGAARD-NEEDLEMAN MODELING OF CRACK PROPAGATION ON STEEL S355
ABSTRACT
The fracture behavior of structural steel S355 is observed with a 3D digital image correlation (DIC) system and simulated with the Gurson-Tvergaard-Needleman (GTN) model. Crack propagation and strain field variation on the surface of a side-grooved compact tension [C(T)] specimen is captured with the DIC system, and the shape of the stable fracture region is obtained from macroscopic optical images of the fracture surfaces of the specimen. 2D and 3D GTN models are used to simulate the damage of a C(T) specimen. It is concluded that very similar force vs. crack opening displacement (F-COD) curve along with the morphology of stable crack extension region can be obtained from the GTN simulations.
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