Impact fatigue properties of epoxy resin filled with SiO2 particles

Niinomi Mitsuo, Uwai Kiyoshi, Kobayashi Toshiro, Okahara Atushi

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


Impact fatigue tests were carried out on epoxy resin filled with SiO2 particles. The effects of the percentage of SiO2 particles and the impact cyclic loading frequency on the impact fatigue strength was investigated. The micromechanism of impact fatigue failure was examined and correlated with the morphology of the fracture surface. The impact stress amplitude, σt, can be estimated by the formula, σ2(Nf · Te)mt = Dt where (Nf· Te) is the cumulative duration time, and mt and Dt, are parameters describing impact fatigue characteristics. The impact fatigue strength and the static strength are governed by the percent of SiO2 particles. Crack initiation under monotonie cyclic impact loading was attributed to decision of the epoxy-SiO2 interface. Unstable crack propagation occurs when the crack passes through the SiO2 particles.

Original languageEnglish
Pages (from-to)439-449
Number of pages11
JournalEngineering Fracture Mechanics
Issue number6
Publication statusPublished - 1991

ASJC Scopus subject areas

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


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