609 有機複合材料の残留応力に及ぼす湿熱環境の影響

概要

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The effects of moisture and heat on the residual stresses in organic composites are theoretically investigated. From the experimental results, the tensile strength of CFRP cross-ply laminates ([0゜/90゜]_45) at 298k in the high vacuum condition is larger than that in the atmosphere. It is considered that the degas and/or moisture desorption from the matrix of epoxy resin and from the interface occur in the high vacuum condition, and then the mechanical properties of CFRP are changed. On the basis of the theory of diffusion, and coupling of the moisture and the heat with temperature varying the diffusivity, we derived the diffusion equations of the moisture and solved them by the use of the finite deference method. Some numerical calculations for the stresses in the composites are carried out by the use of the finite element method. The stress distribution and the hygrothermal residual stresses in organic composites are shown graphically.
一般社団法人日本機械学会の論文
2000-07-31