SYMPOSIA PAPER Published: 20 May 2022
STP163320200072

Validation of Hyperelastic Material Models for Structural Sealants in Compression

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Advanced engineering analysis of structural silicone sealant performance using finite element modeling requires precision in setting up material behavior models. Previous research indicates that the validation of behavior models using sealant response in tension has good agreement between theoretical and actual test results of these hyperelastic materials. In addition to being hyperelastic, structural sealants approach incompressibility as an elastomer with the Poisson ratio in proximity to 0.5. Due to the incompressible nature of the sealants, the modulus behavior can be orders of magnitude different when strained in shear or tension compared with in compression. Tensile adhesion joints were studied in compression and modeled using finite element software to illustrate how well predicted stress-strain behavior aligns with actual behavior. Deformation of the sample was also shown to be influenced by the configuration of the sample shape. Friction between sealant and plates as well as orientation could influence the outward sealant shape under heavy compression. The results of the study further illustrate advances in the ability to more accurately model sealants beyond typical tensile behavior as well as provide additional information on potential failure routes based on the new data.

Author Information

Kimberlain, Jon
Dow Performance Silicones, Elizabethtown, KY, US
Hayez, Valerie
Dow Performance Silicones, Parc Industriel, Seneffe, BE
Feng, Jie
Dow, Midland, MI, US
Allore, Kelly
Dow Performance Silicones, Midland, MI, US
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Details
Pages: 19–38
DOI: 10.1520/STP163320200072
ISBN-EB: 978-0-8031-7713-0
ISBN-13: 978-0-8031-7712-3