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- W2067804514 abstract "Abstract Analyzed in this study is the time dependent damage of a half-plane subjected to a normal surface displacement over a segment at 0.5 mm/s. The material is made of 4340 steel and dissipates energy in an irreversible manner such that the stress and strain response in each local element can be different and change with time. The inherent coupling between mechanical and thermal effects are accounted for without letting the rate change of volume with surface for the element to vanish. This is in contrast to the assumption made in the classical theories of continuum mechanics. Results obtained from the more refined theory of surface/volume energy density differed qualitatively and quantitatively from those of plasticity. The differences are particularly significant in the vicinity of load application and/or boundary. Stress and strain behavior in the local elements exhibited both hardening and softening behavior while plasticity pre-fixes the monotonic behavior for every element at all times. Uniaxial data are related uniquely to those under multiaxial conditions by invoking the concept of a plane of homogeneity. This is done in general without making the restrictive assumptions in plasticity that the effective stress and effective strain coincide with the uniaxial data. By including the change of local strain rates and strain rate history, local elements are found to undergo cooling and heating during the initial stage of loading. Such non-equilibrium phenomenon has also been observed experimentally in uniaxial and pre-cracked specimens." @default.
- W2067804514 created "2016-06-24" @default.
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- W2067804514 date "1988-06-01" @default.
- W2067804514 modified "2023-09-27" @default.
- W2067804514 title "Time dependent damage in half-plane part 1: Displacement loading" @default.
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- W2067804514 doi "https://doi.org/10.1016/0167-8442(88)90031-6" @default.
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