J043013 水環境下において定荷重引張を受ける非主軸平織GFRP積層板の寿命調査

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  • J043013 Study for Lifetime Prediction of Off-Axis Woven GFRP Laminate under Constant Tensile Load in Hydrothermal Environment

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This study reports the off-axis delayed fracture characteristic of woven glass fiber reinforced plastics (GFRP) laminate under constant tensile load in hydrothermal environment. In this study, static tensile test and constant tensile load test were performed in air and water at 40℃. Mechanical properties of GFRP were evaluated by static tensile test. Static tensile test was conducted in water for 200, 500 and 1000 hours, to find out the effect of hydrothermal environment on mechanical properties of GFRP. Result of static tensile test, the maximum stress decreased and the strain at maximum stress decreased greatly in water. In addition, the maximum stress decreased in short term immersion and converged after 200 hours. Constant tensile load test of GFRP was conducted to investigate compliance and fracture time of GFRP. The applied stress level of constant tensile load test was determined as 15%〜75% of the maximum stress obtained from static tensile test. As the result of constant tensile load test, the compliance increased obviously and delayed fracture occurred earlier in water than air. In this study, prediction was conducted for off-axis woven GFRP laminate under constant tensile load in 40°C water using the Reiner-Weissenberg(R-W) criterion; which is based on the non-linear viscoelasticity response. The prediction data was compared well with the experimental data by considering the degradation of GFRP in 40°C water.

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  • 年次大会

    年次大会 2012 (0), _J043013-1-_J043013-5, 2012

    一般社団法人 日本機械学会

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