Cohesive Crack Models for Cement Mortar Examined Using Finite‐Element Analysis and Laser Holographic Measurements

Richard A. Miller*, Alberto Castro‐Montero, Surendra P Shah

*Corresponding author for this work

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

Unlike classically brittle materials, concrete and mortar toughen as cracks propagate. One of the methods to account for this quasi‐brittle response is to use cohesive crack models. Closing pressure, which is assumed to be a function of crack‐opening displacement, is applied on the crack faces in such models. In this paper, measurements of crack‐opening profiles by laser holography were used to examine the various closing‐pressure models. An iterative process based on linear elastic finite‐element analysis with singular elements was used to compute crack profiles when the closing pressure was applied to the crack faces. The predicted crack profiles were compared with the experimental values for evaluation. The validity of the assumption of eliminating crack tip singularity was studied. A crack‐length‐dependent cohesive model is proposed based on experimental measurements of the crack profile.

Original languageEnglish (US)
Pages (from-to)130-138
Number of pages9
JournalJournal of the American Ceramic Society
Volume74
Issue number1
DOIs
StatePublished - Jan 1 1991

Keywords

  • concretes
  • cracks
  • lasers
  • mechanical properties
  • modeling

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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