Effects of Weathering on Fracture Toughness Jc and Micromechanical Properties of Unfilled and Short-Glass-Fiber-Filled Polyester, Xenoy

Jozsef Karger-Kocsis, Klaus Friedrich, Nak Sam Choi, Dirk Oschmann, Dirk Oschmann, Kiyoshi Takahashi, Jozsef Karger-Kocsis, Klaus Friedrich

Research output: Contribution to journalArticle

Abstract

Influence of weathering on fracture toughness (Jc), microhardness (Hμ) and ultrasonic velocity (Vr) in unfilled and short-glass-fiber-filled polyester, Xenoy, has been investigated. The materials were weathered outdoors in Perth, West Australia. The specimens weathered for 6 months showed a slight increase in Jc as compared with unweathered specimens. Weathering for 11 months caused a large decrease in Jc and a slight increase in yield strength. Fracture surfaces of the specimens, however, exhibited little difference. On the other hand, Hμ measurements revealed a feature consistent with the trend of Jc. Vr decreased considerably in the surface layer weathered for 11 months. Weathering by artificial ultraviolet rays induced a strong increase in Hμ and a small decrease in Vr. Consequently, it was shown that the measurement of Jc in combination with Hμ and Vr is an effective way of studying weathering effects for thermoplastics.

Original languageEnglish
Pages (from-to)272-277
Number of pages6
JournalTransactions of the Japan Society of Mechanical Engineers Series A
Volume61
Issue number582
DOIs
Publication statusPublished - Jan 1 1995

Keywords

  • Fracture Toughness
  • Microhardness
  • Polyester Xenoy
  • Short-Fiber-Filled
  • Ultrasonic Velocity
  • Ultraviolet Rays
  • Weathering
  • Yield Strength

ASJC Scopus subject areas

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

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