Effect of displacement rate on the mode I fracture behavior of rubber toughened PMMA

Mitsugu Todo, Kiyoshi Takahashi, Philippe Béguelin, H. Henning Kausch

    Research output: Contribution to journalArticlepeer-review

    5 Citations (Scopus)


    Mode I fracture behavior of rubber toughened PMMA (RT-PMMA) was studied over five decades of displacement rates (10-4-13 m/s) using a high speed tensile testing machine. Two kinds of RT-PMMA, extruded RT-PMMA containing 20 wt.% rubber particles (EM20) and pressed RT-PMMA containing 40 wt.% rubber particles (PM40), exhibited different rate dependencies of the maximum mode I stress intensity factor, KI max, and the maximum mode I energy release rate, GI max. KI max and GI max of EM20 decreased rapidly at high rates (1-11m/s). This suggests that the toughening effect due to rubber blending was dramatically reduced at the high rates. PM40, on the other hand, retained high KI max and GI max values at all the rates tested, thus, maintaining the toughening effect even at a rate of up to 13 m/s. Neat PMMA was also examined, for comparison, and its KI max was found to increase with increase in the displacement rates while GI max remained constant. The rate-dependent KI max and GI max values are discussed, taking (KI max)2/GI max into account, and the fracture surface morphology of the specimens is also considered.

    Original languageEnglish
    Pages (from-to)49-56
    Number of pages8
    JournalJSME International Journal, Series A: Mechanics and Material Engineering
    Issue number1
    Publication statusPublished - 1999

    All Science Journal Classification (ASJC) codes

    • General Engineering


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