Displacement fields around a crack tip in polymers

K. Arakawa, K. Takahashi

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Moiré interferometry was utilized to experimentally determine displacement fields around a crack tip in single-edge-cracked tensile PMMA and PA6/PPE/SBS alloy specimens. Vertical displacement v was expressed as functions of distance r and angle θ from the crack tip, and compared with the approximate solution of linear elastic fracture mechanics to study its applicability to polymers. The results showed that the solution agreed with the experiments in the vicinity of a crack tip in the PMMA specimens, but it yielded a discrepancy as r increased. For the alloy specimens, however, the solution gave much smaller values than the experiments. The principle of superposition was employed to determine the values of v*(= v - v′), i.e. the difference between two displacements v and v′ which was related to a uniform strain field without a crack. The expressions for v* and v were also introduced to analyze the effects of r, θ and load P applied to the specimen. v* was found to be an important factor in increasing the displacements near the crack tip, and the v expression well represented the experimental results for both the PMMA and alloy specimens.

Original languageEnglish
Pages (from-to)289-300
Number of pages12
JournalInternational Journal of Fracture
Volume86
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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