Phani, Kalyan Kumar and Bose, Nripati Ranjan (1987) Temperature-dependence of hydrothermal aging of CSM-laminate during water immersion. Composites Science and Technology , 29 (2). pp. 79-87. ISSN 0266-3538

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Random glass fibre reinforced polyester resin specimens were exposed to hot water at different temperatures. Effects of the environmental history on strength characteristics of the composite were investigated using three-point bend tests. The study shows that reduction of the strength of random-fibre composites due to hydrothermal effects is a rate process for which the temperature influences only the rate constant. The rate constant follows the Arrhenius equation 1/T = 1/To exp [- E/RT], where 1/3 is the rate constant, E and R are activation energy and gas constant respectively; TO is a constant and T is absolute temperature. The me~temperature superposition principle is applicable for the degradation process and a master curve for strength can be obtained by shifting the data along the logarithmic time scale by a shift distance, In a o. This allows the estimation of strength at any temperature from experiments conducted only at one temperature.

Item Type: Article
Subjects: Engineering Materials
Depositing User: Bidhan Chaudhuri
Date Deposited: 09 Apr 2015 06:41
Last Modified: 09 Apr 2015 06:41

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