Estimation of Durability of GFRP Laminates under Stress-Corrosive Environments Using Acoustic Emssion.

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  • ＡＥを用いた応力腐食環境下でのＧＦＲＰの耐久性評価
  • AE オ モチイタ オウリョク フショク カンキョウ カ デ ノ GFRP ノ タイキュウセイ ヒョウカ

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Abstract

The objective of this investigation is to estimate the creep life of glass fiber reinforced plastic (GFRP) under stress-corrosive environments using acoustic emission (AE). The laminates were fabricated using combinations of vinylester resin (R806) and random fiber mat or woven cloth. The creep tests were conducted in 5% nitric acid (HNO3) environment. The AE depends on the loading level and the environment condition. For the creep test, the woven cloth reinforced specimens gave higher number of AE counts than the random mat reinforced specimens. The creep life decreased with increasing creep stress, whereas the rate of AE counts increased with increasing creep stress. A linear relationship was found between the creep life and the AE count rate. Using the proposed equation, a prediction of the creep life of GFRP under corrosive environments would presumably be possible.

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