Author(s): Kari Santaoja
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Keywords: No Keywords
Abstract: This paper concentrates on the effects of instantaneous linear elasticity (Hooke's law) and microcracking. The complementary energy function applied is based both on the theoretical analysis of the stress field around an elliptical crack and on the influence of the crack on the deformation of the body. The damage evolution law proposed is based on the minimum potential energy theorem. A plate specimen under uniaxial tension stress was studied as an example. The material of the specimen was idealised ice. The computed example showed how the load-carrying capacity of the body first started to decrease and then led to the toal failure of the body during the microcrack nucleation. Although the model applied here is uniaxial, the introduced theory forms the basis for extending it to a multiaxial one. The proposed approach connects continuum damage mechanics with fracture mechanics.
Year: 1988