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Abstract

Model composites consisting of a single axial fiber in a cylindrical block of epoxy resin, to one end of which is bonded a flexible glass cover slip and to the other end a rigid substrate, have been self-stressed by immersion in water in order to cause the resin to swell. Changes in the positions of Fizeau fringes created between the free surface of the cover slip and an optical flat have been used to follow flexing of the cover slip, and the displacement fields so measured have been used to estimate (1) the resin swelling and, in particular, the constraint imposed on the axial component of this swelling by the inter-facial bonding between fiber and resin, and (2) the distribution of normal stress in the cover slip and hence in the underlying resin and fiber.

Keywords

Composite materials environmental effects stress distribution optical interference method water uptake

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References

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The Radial Distribution of Axial Stress around a Single Fiber in Epoxy Resin Undergoing Water Uptake

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