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Title Dilatant plasticity or upper bound estimates for porous ductile solids
Creator/Author Richelsen, A.B. ; Tvergaard, V. (Technical Univ. of Denmark, Lyngby (Denmark). Dept. of Solid Mechanics)
Publication Date1994 Aug 01
OSTI IdentifierOSTI ID: 6929550
Other Number(s)ISSN0956-7151; CODEN: AMATEB
Resource TypeJournal Article
Resource RelationActa Metallurgica et Materialia ; Vol/Issue: 42:8
Subject360103 -- Metals & Alloys-- Mechanical Properties; METALS-- MECHANICAL PROPERTIES; DILATANCY;DUCTILITY;MATHEMATICAL MODELS;PLASTICITY
Related SubjectELEMENTS;MECHANICAL PROPERTIES;TENSILE PROPERTIES
Description/Abstract Unit cell model analyses are carried out here for non-hardening elastic-plastic solids containing small voids, to obtain a more complete understanding of the effect of different stress states and void shapes on the growth of voids to coalescence.^Both plane strain analyses for cylindrical voids and full three-dimensional analyses for a material containing a periodic array of spherical voids are carried out, and the results are related to previous results obtained by an axisymmetric model.^It is shown that the predictions are reasonably well represented by a dilatant plasticity model, developed for a porous ductile material.^Also, the cell model analyses fully capture the transition from an early stage of overall plastic yielding to the final stage of void coalescence by local necking of intervoid ligaments.
Country of PublicationUnited States
LanguageEnglish
FormatPages: 2561-2577
System Entry Date2001 May 13

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