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- W161729596 abstract "Tensile stress corrosion cracking in E-glass/polyester chopped strand mat (CSM) has been investigated via the acoustic emission (AE) produced during crack growth. Single cracks were initiated in notched specimens in an environment of aqueous sulphuric acid at room temperature. Tests were done over a range of tensile stress levels and the variation of AE event rate R due to crack growth with applied stress σ was found to follow a power law of the form R ∝ σn, where n = 7.1. Although R was usually fairly constant for a given σ, crack arrest was sometimes found to occur, especially with σ < 30MNm−2. The results indicate that the number of recorded AE events during stress corrosion cracking was less than the number of fibre fractures. Nevertheless the total number of AE signals in this localised cracking does provide a measure of the residual strength of the CSM samples; in principle this enables the time to failure under constant load in a corrosive environment to be estimated directly from acoustic emission data. Studies of fracture surfaces, together with the AE results, indicate that the stress corrosion crack in CSM does not maintain a linear front but advances along easier (i.e. fibre-rich) pathways; this is consistent with the observation that penetration of acids through GFRP vessels and tanks can occur at times well before predicted failure. The results are discussed with reference to structural studies of the material and the predictions of fracture mechanics, and are compared and contrasted with other work on stress corrosion crack growth in GFRP, most of which has been done on material with a uniaxial fibre direction." @default.
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- W161729596 date "1988-01-01" @default.
- W161729596 modified "2023-09-27" @default.
- W161729596 title "An Acoustic Emission Study of Stress Corrosion Cracking in GFRP" @default.
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- W161729596 doi "https://doi.org/10.1016/b978-0-08-036221-2.50083-8" @default.
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