Unloading behavior of polymers due to dynamic crack propagation (1st report, case of epoxy resin)

Kazuo Arakawa, Daisuke Nagoh, Kiyoshi Takahashi

Research output: Contribution to journalArticlepeer-review

Abstract

The method of caustics in combination with a Cranz-Schardin high-speed camera was utilized to study dynamic crack propagation in epoxy specimens. Single-edge-cracked tensile specimens were fractured under pin-loading conditions so that cracks could undergo acceleration and deceleration stages in one fracture process. Dynamic stress intensity factor Kid and crack velocity a were evaluated in the course of crack propagation. Caustic patterns at the loading points were also recorded to estimate the dynamic load P applied to the specimen. Unloading rate i. e. the time derivative of P, was determined as a function of time t, and its correlations with A'id and a were examined.

Original languageEnglish
Pages (from-to)579-583
Number of pages5
JournalNihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume64
Issue number619
DOIs
Publication statusPublished - 1998

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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