A Model for the Diffusion of Moisture in Adhesive Joints. Part III: Numerical Simulations |
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| Authors: | S Roy D R Lefebvre D A Dillard J N Reddy |
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| Affiliation: |
a Engg. Sci. & Mechanics Dept., Blacksburg, VA, U.S.A.
b Matls. Engg. Science Dept., Virginia Tech., Blacksburg, VA, U.S.A.
c Engg. Sci. & Mechanics Dept., Virginia Tech., Blacksburg, VA, U.S.A. |
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| Abstract: | The coupling mechanisms between the diffusion process and the viscoelastic response of an adhesive are explained. A numerical scheme for fully-coupled solutions is proposed and implemented in a two-dimensional finite element code. A number of numerical simulations are presented in order to illustrate the importance of the following features: (1) the bulk viscoelastic behavior, (2) penetrant size, (3) physical aging, (4) the strain dependence of the diffusion coefficient, (5) the concentration dependence of the diffusion coefficient and (6) differential, swelling. The effect of moisture intrusion on the stress (strain) distribution across a butt joint is also presented. |
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| Keywords: | Durability finite element analysis viscoelasticity butt joint stress strain |
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