Modeling Surface Deformation of Glass Fiber Reinforced Composites

Abstract

Surface waviness in glass fiber reinforced composites is predominately due to dif ferences in the thermal expansion properties of the resin and the reinforcement. A model has been developed which simulates the surface deformation of glass fiber reinforced composites as a function of factors such as molding temperature, thickness of glass fibers, and the thermal expansion properties of the resin and the glass. Application of a top layer helps to conceal fiber readout which is a type of surface waviness. Based on the predic tions of the model, increasing the top layer thickness is more effective than increasing the top layer stiffness.

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References

Atkins, K.E. and Rocky, J.F., Jr. , Plastics Compounding, pp. 31-38 (January 1982).

Bartkus, E.J. and Kroekel, C.H. , Applied Polymer Symposium No. 15, pp. 113 - 135 (1970).

Overholt, G.T., Jr. , SPI Reinforced Plastics, 39th Annual Technical Conference (January 16-19, 1984).

Craft, W.J. and Christensen, R.M. , J. Composite Materials, Vol. 15, pp 2-20 (January 1981).

Schapery, R.A. , J. Composite Materials, Vol. 2, pp. 380-404 (July 1968).

Halpin, J.C. , J. Composite Materials, Vol. 3, pp. 732 - 734 (October 1969).

Fahmy, A.A. and Ragi-Ellozy, A.N. , J. Composite Materials, Vol. 8, pp. 90-92 (January 1974).

Kia, H.G. , General Motors Research Laboratories, Unpublished Results.

Timoshenko, S. and Lessells, J.M. , Applied Elasticity, Westinghouse Technical Night School Press (1925).

10.

Byars, E.F. and Snyder, R.D. , Engineering Mechanics of Deformable Bodies, InternationalaTextbook Co. (1964).