Crack velocity and acceleration effects on the dynamic stress intensity factor in polymers

K. Arakawa, D. Nagoh, K. Takahashi

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Dynamic crack propagations in PMMA and epoxy specimens were studied using the method of caustics in combination with a Cranz-Schardin type high-speed camera. Single-edge-cracked tensile specimens were fractured under pin-loading conditions so that cracks could experience acceleration, deceleration and re-acceleration stages in one fracture process. The dynamic stress intensity factor KID, crack velocity ȧ and acceleration ä were evaluated in the course of crack propagation to examine the effects of ȧ and ä on KID. Results showed that ȧ and ä were important factors in changing the values of KID, and for a constant ȧ the decelerating crack had a larger value of KID than the accelerating or re-accelerating crack. Also, it was found that KID could be expressed as two parametric functions of ȧ and ä for PMMA and epoxy specimens.

Original languageEnglish
Pages (from-to)305-313
Number of pages9
JournalInternational Journal of Fracture
Volume83
Issue number4
DOIs
Publication statusPublished - Jan 1 1997

All Science Journal Classification (ASJC) codes

  • Computational Mechanics
  • Modelling and Simulation
  • Mechanics of Materials

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