Predicting cleavage fracture in presence of residual stresses; A numerical case study

S. Hadidi-Moud, C.E. Truman, D.J. Smith

    Research output: Chapter in Book/Report/Conference proceedingConference proceedingpeer-review


    The extensive use of adhesive bonding has placed significant research interest in development of fracture prediction tools for bi-material interface problems. The focus of the research reported here is to address this issue for a specific adhesive bond problem. This has been achieved through the development of a comprehensive transformative numerical code in ANSYS. Fundamental hypotheses are presented in order to employ relevant singular elements on crack tip. Element type and size effects on results are discussed. The fracture criterion examined for modeling progressive growth of sharp crack in E27/steel interface is based on the maximum principal stress. Recent laboratory findings were used for Mode-I fracture data of CT specimen. Analyses have been implemented by modeling both linear elastic and nonlinear hardening behavior of E27 according to standard tensile test data for this epoxy. The results are discussed in details. Also a simple brittle failure predicting approach, based on near tip linear elastic interfacial fracture mechanics (LEIFM), is demonstrated and proposed to the specific bond problem. Final model affords to elaborate acceptable failure conditions for bi-material bonded structures with interfacial cracks.
    Original languageEnglish
    Title of host publicationFracture of Nano and Engineering Materials and Structures
    Place of PublicationDordrecht
    Number of pages2
    ISBN (Electronic)978-1-4020-4972-9
    ISBN (Print)978-1-4020-4971-2
    Publication statusPublished - 2006
    Event16th European Conference of Fracture - Alexandroupolis, Greece
    Duration: 3 Jul 20067 Jul 2006
    Conference number: 16


    Conference16th European Conference of Fracture
    City Alexandroupolis


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