RATE-SENSITIVE DAMAGE THEORY FOR BRITTLE SOLIDS.

Wimal Suaris, Surendra P. Shah

Research output: Contribution to journalArticle

51 Scopus citations

Abstract

A continuous damage theory is presented for the quasi-static and dynamic behavior of brittle materials. Considering flat microcracks a vectorial representation is adopted for the damage variable. A free energy function dependent on the coupled invariants of strain and damage is postulated, and the constitutive equations and the damage evolution equations are derived consistently subject to thermodynamic restrictions. The stress-strain curves for uniaxial tension and compression resulting from the theory are compared with available experimental results for concrete. A decrease in the nonlinearity of the stress-strain curves is observed as the strain-rate is increased. A higher stress-strain sensitivity in tension, as compared to compression, is also predicted.

Original languageEnglish
Pages (from-to)985-997
Number of pages13
JournalJournal of Engineering Mechanics
Volume110
Issue number6
StatePublished - Jun 1 1984

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ASJC Scopus subject areas

  • Mechanical Engineering

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