Study on Interlaminar Shear Strength Test Method of Fiber Reinforced Organic Composite Materials

Fiber reinforced organic composites materials such as GFRP, which consist of glass fiber and epoxy resin, are intended for use as insulating and structural materials for superconducting magnets. In order to maintain the reliability and long-term durability of these insulating materials, the adhesive...

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Bibliographic Details
Published inTEION KOGAKU (Journal of Cryogenics and Superconductivity Society of Japan) Vol. 57; no. 3; pp. 155 - 159
Main Authors Masaaki, HIRAI, Shigehiro, NISHIJIMA, Yoshihiko, TODA
Format Journal Article
LanguageEnglish
Japanese
Published Tokyo CRYOGENICS AND SUPERCONDUCTIVITY SOCIETY OF JAPAN 2022
Japan Science and Technology Agency
Subjects
Adhesive strength
Composite materials
Epoxy resins
Glass fiber reinforced plastics
Glass-epoxy composites
ILSS(Interlaminar shear strength)
Insulation
Interfacial shear strength
Laminates
NAL method
notched specimen
Polymer matrix composites
Preservatives
Shear strength
Shear tests
Superconducting magnets
Test methods
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Summary:Fiber reinforced organic composites materials such as GFRP, which consist of glass fiber and epoxy resin, are intended for use as insulating and structural materials for superconducting magnets. In order to maintain the reliability and long-term durability of these insulating materials, the adhesive strength between laminates, or between laminates and the inserted films are important. In the composites, the adhesive strength is defined as the interlaminar shear strength and is one of the most important index of the composites materials. In this experiment, the test was conducted to establish a method to evaluate the interlaminar shear strength of thin-FRP. The shear test method specified by JIS and ASTM does not produce pure shear failure in fiber reinforced plastics, especially thin composites, and it is difficult to obtain accurate interlaminar shear strength. We developed the shear test method where the interlaminar shear strength can be accurately measured using NAL method and notched specimen from different surface. The experiments were performed both at room and nitrogen temperature. Obtained data were compared with those in ASTM method. It was confirmed that the developed method showed satisfactory performance to obtain the interlaminar shear strength.
ISSN:0389-2441
1880-0408
DOI:10.2221/jcsj.57.155