Effects of Interfacial Adhesive Property and Stress Ratio on Temperature Increase of Short-Fiber Reinforced Thermoplastics under Fatigue Loading

• HIWA Chiaki

• NAKAI Yoshikazu

• IKAWA Junichi

Bibliographic Information

Other Title

• 短繊維-熱可塑性樹脂複合材料の疲労の温度上昇に及ぼす応力比と界面接着性の影響
• タンセンイ ネツ カソセイ ジュシ フクゴウ ザイリョウ ノ ヒロウ ノ オンド ジョウショウ ニ オヨボス オウリョクヒ ト カイメン セッチャクセイ ノ エイキョウ

Abstract

The effect of stress ratio on the fatigue failure of short-fiber reinforced polypropylene (PP) was investigated. An amino silane coupling agent was employed to improve the interfacial adhesion between PP and glass fiber, and a urethane type sizing agent was applied to deteriorate the adhesion. Fatigue tests were carried out at stress ratios of 0, -1, and ∞. The stress-strain relationship and the surface temperature of the specimens were measured during fatigue. The fatigue strength for R=∞ was 50% lager than that for R=0 for the same number of cycles to failure, and the temperature increase for R=0 was greater than that at other stress ratios. The surface temperature at R=∞ of the composite was almost identical of that of the resin. It must have come from the difference in the fatigue damage mechanism between composites and the resin. Temperature increase of the composite during cyclic loading at R=0 may have come from the damping effect in high-tension stressed resin around the ends of fibers. However, at R=∞ stress around them may have been much smaller than that for R=0 because of the buckling of fibers under compressive stress. To remove the effect of temperature increase, the fatigue test was carried out under the constant specimen temperature of 25 °C, and it was found that the fatigue life was 100 times longer than that obtained from the uncontrolled test where the specimen temperature increase during fatigue. For the fatigue test at 25 °C, the brittle fracture surface was observed, while ductile fracture surface appeared for the temperature increase fatigue test.

Journal

• Journal of The Adhesion Society of Japan

  Journal of The Adhesion Society of Japan 38 (4), 116-123, 2002

  The Adhesion Society of Japan

Keywords

• ポリプロピレン

Details

• CRID: 1390282679251422848
• NII Article ID: 10008011247
• NII Book ID: AN10341672
• DOI: 10.11618/adhesion.38.116
• COI: 1:CAS:528:DC%2BD38XjtlOisr4%3D
• ISSN: 21874816
• ISSN: 09164812
• NDL BIB ID: 6147546
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6147546
• Web Site: https://www.jstage.jst.go.jp/article/adhesion/38/4/38_4-1/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed