Deformability and strength of layered composite structure under mechanical and thermal loading
2005
Brauns, J.(Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Rural Engineering. Dept. of Structural Engineering)E-mail:[email protected] | Rocens, K.(Riga Technical Univ. (Latvia). Faculty of Building and Civil Engineering. Inst. of Building and Reconstruction)E-mail:[email protected]
The article discusses analytical methods for estimation of mechanical properties and the response of composite materials under unilateral environmental exposure. An advanced graphite/epoxy composite plates with different configuration were examined. It is determined that mid-plane strains, curvatures and warping at non-symmetric temperature distribution depend on temperature profile, composite type and configuration as well as stacking sequence of layers. The optimum configuration for thermal response may not coincide with that for mechanical properties. Besides elastic properties, essential is the material strength limits. Prediction of failure of structural components is accomplished by comparing functions of the stresses to material strength. By using experimental results fixed on layered composite shells, the failure modes and stress distribution is determined and discussed.
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