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- W2055339911 abstract "In the present paper a new fracture criterion (the T-criterion) is described. It is based on the Griffith fracture theory, as modified by Orowan, according to which failure is the result of the mutual action of both fracture and yielding mechanisms. The main idea of the T-criterion is that fracture is caused by normal stresses, whose contribution is included in the dilatational part TV of the strain-energy density. It is then postulated that fracture will initiate outside the plastic region surrounding the crack-tip, when TV reaches a critical value. On the other hand, plasticity depends on the distortional part of strain-energy density and its extent is defined by the Mises yield locus, which is used for the calculation of the elastic-plastic boundary, along which TV is computed. Then, the TV = f(ϑ) curve around the crack constitutes a physically sound curve of the distribution of the total elastic strain-energy density there.Then, the critical TV,0- and TD,0-parameters control the failure behaviour of the material and, thus, the T-criterion can distinguish between failure by fracture or yielding. A study is made on the relative validity of the expected angle of crack propagation, especially in ductile materials. Different predictions are obtained from the T-criterion, as they are compared to those of an up-to-now popular criterion suitable only for brittle fractures. Experimental data show good agreement with the predictions of the T-criterion, especially for the critical stress for fracture." @default.
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- W2055339911 date "2012-07-01" @default.
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- W2055339911 title "A CONTINUUM MODEL FOR THE WHOLE MUSCLE" @default.
- W2055339911 doi "https://doi.org/10.1016/s0021-9290(12)70485-2" @default.
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