Reduction of hygrothermal transverse stresses in unidirectional hybrid composites under cyclic environmental conditions
- 90 Downloads
When fiber-reinforced polymer plates are exposed to cyclic environmental conditions, polymer matrix absorbs or desorbs continuously the moisture due to the variation in service temperature and relative humidity. Both temperature and moisture concentration produce an important hygrothermal transverse stresses, which are maximum on both edges of the composite plates. These transverse stresses which are more important at first times of moisture diffusion, can produce a probable damage of composite plates. To extend the durability of our composite plate, interplay hybrid composites are adopted to reduce the transverse stresses on edges. Therefore, a variation of the relationship between thicknesses of unidirectional hybrid composites constituents AS/3501-5 and T300/5208 is carried out in order to find minimal transverse stresses. This thicknesses variation enables us to find the best configuration which gives favourable service conditions of our hybrid composite, i.e., to predict firstly a considerable reduction of hygrothermal transverse stresses at both edges of our hybrid plate, secondly to reduce or to attenuate the edge effect developed in 6 days and 6 weeks periods.
KeywordsUnidirectional hybrid composite Moisture Temperature Transverse stresses Cyclic environmental conditions
Unable to display preview. Download preview PDF.
- Adda-Bedia, E.A., Han, W.S., Verchery, G.: Simplified methods for prediction diffusion in polymer matrix composites with cyclic environmental conditions. Int. J. Polym. Polym. Compos. 6(14), 189–203 (1998) Google Scholar
- Adda-Bedia, E.A., Tounsi, A., Sereir, Z.: A quantitative study on the influence of anisotropy on the hygrothermal behaviour of the laminated composite plates. In: 8th International Conference on Composite Engineering, ICCE8, Tenerife, Spain, August 5–11, 2001, p. 71 (2001) Google Scholar
- Almen, G., MacKenzie, P., Malhotra, V., Maskell, R.: 977: characterization of a family of new toughened epoxy resins. In: 35th International SAMPE Symposium, pp. 419–431 (1990) Google Scholar
- Browning, C.E., Husman, G.E., Whitney, J.M.: Moisture absorption and desorption of composite materials. J. Compos. Mater. 10(2) (1977) Google Scholar
- Gopalan, R., et al.: Diffusion studies on advanced fibre hybrid composites. In: Springer, G.S. (ed.) Environmental Effects on Composite Materials, vol. 3. Technomic, Lancaster (1988) Google Scholar
- Loverich, J.S., Russell, B.E., Case, S.W., Reifsnider, K.L.: Life prediction of PPS composites subjected to cyclic loading at elevated temperatures. In: Time Dependent and Nonlinear Effects in Polymers and Composites. ASTM STP, vol. 1357, pp. 310–317. ASTM, Philadelphia (2000) CrossRefGoogle Scholar
- Shen, C., Springer, G.S.: Effects of moisture and temperature on the tensile strength of composite materials. In: Environmental Effects on Composite Materials, pp. 79–93. Technomic, Westport (1981) Google Scholar
- Springer, G.: Numerical procedures for the solutions of one-dimensional Fickian diffusion problems. In: Environmental Effects on Composite Materials, pp. 166–199. Technomic, Westport (1981) Google Scholar
- Tounsi, A., Adda-Bedia, E.A., Sereir, Z., Benhassaini, H.: Effect of fibre orientation and cyclic environmental conditions on the non-mechanical residual stresses in resin matrix composite panels. Arab. J. Sci. Eng. 28(1A), 1–21 (2003) Google Scholar
- Tsai, S.W.: Composite Design, 4th edn. Think Composites, Dayton (1988) Google Scholar