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Abstract

The objective of this study was to determine if X-ray diffraction could be utilized to detect moisture non-destructively in graphite/epoxy laminates. CuKα ₁ X-rays were diffracted from 333 + 511 planes of Al particles em bedded between the first and second plies of [0 ± 60] _s lamiantes during layup. Diffracted peak positions were quite sensitive to environmental moisture, decreasing 0.624 ° ± .015 °2θ on going from a completely dry to a completely wet state at 50°C. The changes were reversible. Correlations be tween in-plane, residual particle strains and both average and local moisture content of the laminate were obtained. Annealing effects were investigated.

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References

C.-H. Shen and G.S. Springer , "Moisture Absorption and Desorption of Composite Materials," J. Composite Matls., Vol. 10, ( 1976), p. 2.

Paul Predecki and C.S. Barrett , "Stress Measurement in Graphite/Epoxy Composites by X-ray Diffraction from Fillers," J. Composite Matls., Vol. 13, (1979), p. 61.

Paul Predecki and C.S. Barrett , "Residual Stresses in Resin Matrix Composites." Presented at the 28th Sagamore Army Materials Research Conference, Lake Placid, New York, July 13-17, 1981. To be published in conference proceedings.

Soc. Automotive Engineers Information Report SAE J 784a.

D.L. Flaggs and F.W. Crossman , "Analysis of Viscoelastic Response of Composite Laminates During Hygrothermal Exposure," J. Composite Matls., Vol. 15, ( 1981), p. 21.

Y.T. Yeow , D.H. Morris and H.F. Brinson , "Time-Temperature Behavior of a Unidirectional Graphite/Epoxy Composite " in "Composite Materials: Testing and Design (5th Conference", S.W. Tsai, Editor. ASTM STP 674, 1979 , pp. 263-281.

S.W. Tsai and H.T. Hahn , "Introduction to Composite Materials." Technomic Publ. Co., Westport, Conn. (1980 ), p. 352.

Detection of Moisture in Graphite/Epoxy Laminates by X-Ray Diffraction

Abstract

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