Dynamic crack propagation and unloading behavior of brittle polymers

K. Arakawa, D. Nagoh, K. Takahashi

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    22 Citations (Scopus)


    The method of caustics in combination with a Cranz-Schardin high-speed camera was utilized to study dynamic crack propagation and unloading behavior of epoxy, PMMA and Homalite-100 specimens. Dynamic stress intensity factor KID and crack velocity ȧ were evaluated in the course of crack propagation. Caustic patterns at the loading points were also recorded to estimate load P applied to the specimen. Unloading rate Ṗ, the time derivative of P, was determined as a function of time t, and its time correlation with KID or ȧ was examined. The findings showed that the change in Ṗ was qualitatively in accord with the change in KID or ȧ. However, there existed slight differences among the values of t giving the maximum Ṗ, ȧ and KID, so that their order was ȧ, Ṗ and KID.

    Original languageEnglish
    Pages (from-to)345-358
    Number of pages14
    JournalInternational Journal of Fracture
    Issue number4
    Publication statusPublished - 1999

    All Science Journal Classification (ASJC) codes

    • Computational Mechanics
    • Modelling and Simulation
    • Mechanics of Materials


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