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Degradation behavior of mechanically fastened joints of glass‐reinforced crosslinked polyester immersed in hot water
Author(s) -
Morii Tohru,
Hamada Hiroyuki,
Maekawa ZenIchiro,
Tanimoto Toshio,
Hirano Takahiro,
Haruna Kazushi
Publication year - 1995
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.750160308
Subject(s) - materials science , composite material , joint (building) , failure mode and effects analysis , ultimate tensile strength , glass fiber , tension (geology) , bearing (navigation) , polyester , fibre reinforced plastic , bolted joint , finite element method , structural engineering , cartography , engineering , geography
Abstract This study deals with the degradation of mechanically‐fastened GFRP joints immersed in hot water (80°C). The material used was randomly oriented E‐glass fiber continuous strand mat with a crosslinked polyester. Three kinds of joint geometries were adopted; thickness was 3 mm, hole diameter was 6 mm, the distance from hole center to top‐edge was 18 mm (3 e ), and specimen widths were 18 (3 w ), 30 (5 w ), and 42 mm (7 w ). Failure modes of original dry specimens were a function of joint geometry, The dominant failure mode of 3 w 3 e joints was net‐tension, whereas 5 w 3 e and 7 w 3 e joints displayed bearing failure. As degradation progressed, the dominant failure mode gradually shifted from net‐tension to bearing failure. Strength reduction was marked in 5 w 3 e and 7 w 3 e joints, in which the dominant failure mode was bearing. Joint strength and failure mode were predicted from the combination of a macroscopic failure criterion and characteristic curves obtained from tensile testing of rectangular specimens with holes, bearing tests, and finite element analysis. Predictions agreed with experiment.