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- W2022032407 abstract "Abstract The configurational evolution in time and space of two-dimensional ellipsoidal damage into an elongated flaw with preferred orientation is solved and studied. The damage is represented as a single, traction free, ellipsoidal void embedded in an infinitely large time-dependent porous-like solid. The solid creeps in a power-law fashion under static biaxial loads which induce a large-scale rotation (with volume enlargement contraction) of the void. In the special case of unidirectional loading the free boundary of the void evolves into an expanded and elongated new shape while rotating towards a position codirectional with the principal tensile axis. The solution which describes this phenomenon made use of the analogy between linear viscous fluid and incompressible elasticity but has been extended (by incremental time-step integration) to geometrical and material nonlinearities. The enlargement of the analysis to multiple-voids interactions (via the “sel-fconsistent” approximation) enables one to follow the porosity time evolution till rupture. The main outcome is the reinforcement of McClintock and Berg's vision of the ductile rupture mechanism by void coalescence. The process simulation agrees well with visual observations of void expansion and rotation in a highly viscous material and with experimental measurements of the rupture ductilities of creeping materials with dilfercnt strain-rate sensitivity index. Similarities and dissimilarities with existing phenomenological damage theories are discussed." @default.
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- W2022032407 date "1988-01-01" @default.
- W2022032407 modified "2023-09-27" @default.
- W2022032407 title "Damage evolution and rupture in creeping of porous materials" @default.
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- W2022032407 doi "https://doi.org/10.1016/0020-7683(88)90058-3" @default.
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