ISSN: 0884-6804
CODEN: JCTRER
Page Count: 7

Residual Thermal Stresses in Bonded Metal and Fiber-Reinforced Plastic Systems
Yaniv, G
Graduate student and professor, Faculty of Mechanical Engineering, Technion-Israel Institute of Technology,

Ishai, O
Graduate student and professor, Faculty of Mechanical Engineering, Technion-Israel Institute of Technology,

Abstract

A model of a nonsymmetrical bonded fiber-reinforced plastic (FRP) metal system was investigated, both theoretically and experimentally, to study the effects of curing, thermal history, and material characteristics on its thermoelastic behavior. It was found that a simplified closed form solution is sufficient for the prediction of the adherends' residual thermal stresses, while a numerical finite element solution is the best approach for determining the interlaminar stresses present in the boundary zones of the adhesive layer. In these zones the shear and lateral tensile stresses (peel) reach their respective maximum values, which are eventually the cause of the interlaminar failure mode of the adhesive layer under subsequent thermomechanical loading.

It was confirmed by both the numerical solution and the experimental results of the model deflection that adhesive characteristics have almost no effect either on the stresses in the adherends or on the overall thermoelastic deformation behavior of the bonded system.

Keywords:
composite materials, residual stress, thermal stresses, thermoelasticity

Paper ID: CTR10742J
DOI: 10.1520/CTR10742J
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