• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

1998 Fiscal Year Final Research Report Summary

Characteristics of Stress Corrosion Cracking in GFRP Laminates under Acid Stress Environment

Research Project

Project/Area Number 09650120
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Materials/Mechanics of materials
Research InstitutionWaseda University

Principal Investigator

KAWADA Hiroyuki  Waseda University, Dept.of Mech.Eng., Professor, 理工学部, 教授 (20177702)

Project Period (FY) 1997 – 1998
KeywordsGFRP / Stress corrosion cracking / Corrosion fatigue / Stress intensity factor / Crack propagation / Threshold
Research Abstract

Studies on crack propagation behaviors and threshold properties of GFRP Laminates under an acid stress environment.
GF/epoxy specimens, which are made of E-glass fiber and epoxy resin, are investigated, and effects of the loading conditions arid the environmental conditions on crack propagation behaviors and threshold properties in HCI solution are researched.
Constant and cyclic loading tests are performed, so that the stress ratio and the frequency are changed for the cyclic loading tests. As a result, it is found that crack propagation depends on a time and the maximum stress intensity factor, K_<lmax>. There is no acceleration of crack propagation due to cyclic loading in a K_<lmax>-da/dt diagram. Furthermore, it is verified that the threshold stress intensity factors, K_<ISCC>, under both loading condition have a distinguished difference in the range of our study. From fractographic observations, interfacial crackings and pull-outs of fibers are remarkable under the cyclic loading condition.
As for the environment condition, changes in the crack propagation behaviors due to the alternations of acid concentration and temperature of the HCI solution are researched. As the acid concentration increases, the K_<ISCC> seems to be a constant under the constant loading conditions and the solution temperature of 303K.And it is noted that the K_<ISCC> takes its minimum value at lmoh/l under the cyclic loading conditions and the solution temperature of 303K.
Increase of the solution temperature lead to the quickening of crack propagation. Arrhenius' equation can be adopted in a stable crack propagation region according to Paris' power low. As for the threshold properties, there is little effect of temperature under the constant loading conditions. On the other hand, the K_<ISCC> decreases and its minimum value vanished under the cyclic loading conditions and the solution temperature of 343K.

  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] 川田 宏之 他: "酸応力環境下における耐食性FRPのき裂進展特性〜負荷形式がき裂進展に与える影響を中心に〜" 第5回機械材料・材料加工技術講演会講演論文集. 97-11. 121-122 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 川田 宏之 他: "GFRP織物積層板の酸応力環境下におけるき裂進展挙動と数値シミュレーション" 第27FRPシンポジウム講演論文集. 27. 207-210 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 川田 宏之 他: "織物GFRP積層板の応力腐食割れ〜下限界特性と酸濃度の関係〜" 日本機械学会第75期通常総会講演会講演論文集. 98-1. 752-753 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 川田 宏之 他: "織物GRFP積層板の応力腐食割れに及ぼす酸濃度の影響" 日本複合材料学会1998年度研究発表講演会予稿集. 33-34 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 川田 宏之 他: "腐食環境下におけるGFRP積層板の疲労き裂進展挙動" 第42回日本学術会議材料研究連合講演会前刷集. 3-4 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Hiroyuki Kawada, etc.: ""Characteristics of Crack Propagation on Anti-corroded FRP under Stress Acid Environment -Effect of Load Type on Crack Propagation-"" Proceedings of the 5th Material and Processing Conference. 97-11. 121 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hiroyuki Kawada, etc.: ""Crack Propagation Behavior and Numerical Simulation of Woven GFRP Laminates under Stress Acid Environment"" Proceedings of JSMS Composites-27. 27. 207 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hiroyuki Kawada, etc.: ""Stress Corrosion Cracking of Woven GFRP Laminates-Relation between K_<ISCC> and Acid Concentration-"" Proceedings of the 75th JSME Spring Annual Meeting. 98-1. 752 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hiroyuki Kawada, etc.: ""Effect of Acid Concentration on Stress Corrosion Cracking of Woven GFRP Laminates"" Proceedings of JSCM Conference 1998. 33 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hiroyuki Kawada, etc.: ""Fatigue Crack Propagation of GFRP Laminates under Acid Stress Environment"" Proceedings of the 42 Japan Congress on Material Research. 3 (1998)

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 1999-12-08  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi