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- W6687480 abstract "A continuum mechanics solution is offered to explain the role of remoted confining pressure (encountered often in metal forming processes) in closing voids in dilatant visco-plastic materials. The solution accounts for the simultaneous large scale rotation, contraction and shortening of an ellipsoidal void subjected to non-symmetric far field, load, either unidirectionally or bi-directionally. The interaction of the void with its surrounding voids is achieved in a ‘self consistant’ sense (i.e. the bulk solid behaves like the unit cell with its single void). The volume fraction of the voids represents a scalar measure of the damage in the solid. The geometrical and material nonlinearities associated with the damage arrest by voids closure is simulated by piece-wise linear time-integration of the equivalent elastic solution. It is applied to the visco-plastic situation via the Rayleigh analogy. The major outcome is the ability to simulate with some generality the evolution of the closure strain and the inhibition of the material dilatancy. The advantage of operating the forming process under confining pressure environment and the usefulness of having materials with relatively high rate sensitivity index (of around 0.5, thus characterizing the superplastic condition) are assessed quantitatively with regard to damage arrest." @default.
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- W6687480 date "1987-01-01" @default.
- W6687480 modified "2023-09-26" @default.
- W6687480 title "Damage Arrest by Closure of Voids in Dilatant Solids Subjected to Compressive Load" @default.
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- W6687480 doi "https://doi.org/10.1016/b978-0-444-42859-2.50036-3" @default.
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