Assessment of hyperelastic material models for the application of adhesive point-fixings between glass and metal |
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| Affiliation: | 1. Department of Structural Engineering, Ghent University, Ghent, Belgium;2. Department of Mechanical construction and production, Ghent University, Ghent, Belgium;1. Carnegie Mellon University in Qatar, P.O. Box: 24866, Doha, Qatar;2. Department of Mechanical Engineering, Michigan State University, East Lansing, MI 48824, United States;1. Department of Physics, University of Évora, Colégio Luís António Verney, Rua Romão Ramalho, 59, 7002-554 Évora, Portugal;2. Institute of Structural Mechanics, Bauhaus-University Weimar, Marienstraße 15, 99423 Weimar, Germany;3. Mechanical Engineering Department, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal;4. Mechanical Engineering Department, School of Engineering, University of Minho, Campus de Azurém, 4804-533 Guimarães Portugal;5. ICIST/CERIS, Instituto Superior Técnico, Lisboa, Portugal;1. Escuela Técnica Superior de Ingeniería Aeronáutica y del Espacio, Universidad Politécnica de Madrid, Plaza Cardenal Cisneros, 3, 28040 Madrid, Spain;2. Department of Industrial Engineering - Aerospace Division, University of Naples Federico II, Piazzale Tecchio, 80, 80125 Naples, Italy |
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| Abstract: | For the investigation of adhesive point-fixings a computationally demanding finite element model is required. The accuracy of the numerical results depends highly on the validity of the used material models, which describe the deformation behaviour of the adhesive. The material models are derived from curve-fitting the mathematical expressions to experimental data mostly derived from uniaxial and equibiaxial experiments. In literature the suitability of the used material models is determined by comparing the numerical results from the same uniaxial and equibiaxial experiments to the experimental results. In contrast, in this contribution, the material models are validated by two additional validation experiments, i.e. an adhesive point-fixing loaded in uniaxial tension and an adhesive point-fixing loaded in a combination of tension and shear.After comparison of the numerical and experimental displacements, it appears that the material models that are calibrated by shear tests or by a combination of shear tests yield the best results. In addition, most numerical load-displacement curves have an almost linear gradient at small strains. Such behaviour is also demonstrated in the experimental measurements of the deformation. |
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| Keywords: | C Finite element stress analysis D Mechanical properties of adhesives Hyperelastic material models Adhesive point-fixings |
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