The mechanism of damage around crack tip in rubber-modified epoxy resin

Translated title of the contribution: The mechanism of damage around crack tip in rubber-modified epoxy resin

Deok Bo Lee, Toru Ikeda, Mitsugu Todo, Noriyuki Miyazaki, Kiyoshi Takahashi

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

In this work, we investigate the toughening mechanism of the rubber modified epoxy resin. The fracture toughness (KIC) is measured using CT specimens for three kinds of rubber modified epoxy resin with different rubber content. The damage zone and rubber particles around a crack tip of a damaged specimen just before fracture are observed by a polarization microscope and an atomic force microscope (AFM). Both the fracture energy (GIC) and the size of damage zone increase with the rubber cóntent below 15 wt%. The size of the rubber particles can be qualitatively correlated with the GIC and the size of damage zone. The cavitation of the rubber particles inside the damage zone is observed, which is expected to be main toughening mechanism by rubber particles. The stress which causes the cavitation of rubber particles is estimated by the Dugdale model.

Translated title of the contributionThe mechanism of damage around crack tip in rubber-modified epoxy resin
Original languageJapanese
Pages (from-to)439-446
Number of pages8
JournalNihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume65
Issue number631
DOIs
Publication statusPublished - 1999

All Science Journal Classification (ASJC) codes

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

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