This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Finite Element Analysis and Material Modeling of Elastomeric Components and Assemblies: Some Practical Considerations
Technical Paper
2007-26-041
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Event:
SIAT 2007
Language:
English
Abstract
Elastomers are used extensively in many industries like automotive, aerospace and heavy industries because of their wide availability and low cost. They are also commonly used because of their excellent damping and energy absorption characteristics. They are often used to seal against moisture, heat, and pressure. Flexibility, resilience, nontoxic properties, moldability, and variable stiffness attributes are added benefits. Elastomeric materials behave like a highly viscous fluid during initial processing and manufacturing. During final processing, the polymer chains are cross-linked by vulcanization (or by curing), and the elastomeric material is then no longer highly viscous and the material can then undergo large reversible elastic deformations. In view of the above complex properties, the behavior of elastomeric materials is not adequately characterized by conventional elastic or elasto-plastic material models. Since the usage of elastomers in the auto industry is exponentially increasing and the design requirements are increasingly demanding it is of utmost importance to characterize elastomeric materials accurately with math models. Accurate analysis of elastomeric components requires special material model definitions and the material models are quite different than those commonly used for metallic or plastic parts. This paper attempts to characterize elastomeric materials with hyperelastic material models and also describes how to apply such math models into commercially available CAE tools. These studies will act as a useful guideline or best practice for engineers working with elastomeric components. A standard seal configuration has been studied to demonstrate a step-by-step procedure undertaken to develop an accurate material model for a seal material. The scope of this study goes beyond just analytical simulation. Consideration and the details for material testing have also been included. Some difficulties in obtaining and using material data for elastomers with finite element analysis have been highlighted and some methods of overcoming these problems have been suggested. Several standard mathematical models for elastomeric material have been reviewed. Problems associated with analysis of contact have been highlighted with particular reference to hyperelastic materials
Authors
Citation
Bhandari, A., Erdman, D., Bhatia, A., and Strang, W., "Finite Element Analysis and Material Modeling of Elastomeric Components and Assemblies: Some Practical Considerations," SAE Technical Paper 2007-26-041, 2007, https://doi.org/10.4271/2007-26-041.Also In
References
- Daley, J. R. “FEA Modelling of Elastomeric Seals” IMechE Conference on Rubber Engineering Using FEA London 4 April 1995
- ABAQUS ABAQUS/Standard User's Manual Hibbit Karlsson & Sorensen 1994
- Tso, C. Peng, S. H. “Finite Element Analysis of Elastomeric Seal Including Frictional Effects” ACS RUBBER. Preprint 148th meeting 1995
- Cadge Prior, A. “Finite Element Modeling of Three-Dimensional Elastomeric Components” Finite Element Analysis of Elastomers Boast D Coveny VA Professional Engineering Publishing Limited London 187 205 1999
- Prior, A. Cadge “Finite Element Modeling of Contact of Hyperleastic Materials” in Finite Element Analysis of Elastomers Boast D Coveny VA Professional Engineering Publishing Limited London 129 140 1999
- Mullins, L. “Softening of Rubber by Deformation” “Rubber Chemistry and Technology,” 42 339 362 1969
- Gent, A. N. “Engineering with Rubber” Oxford University Press New York, NY 1992
- Ferry, J. D. Viscoelastic Properties of Polymers 2nd John Wiley & Sons New York, NY 1970
- Day, J. “A Method for Equibiaxial Stretching of Elastomeric Sheets” HKS Michigan Update Seminar and Users' Meeting Novi, Michigan 1999
- Wolf, D. Miller, K. “Experimental Elastomer Analysis” Meeting of the Rubber Division American Chemical Society Orlando, Florida 1999
- Dalrymple, T. Experimental Elastomer Analysis Course Notes Ann Arbor, Michigan 1998
- Daley J. R. Mays, S. “The Complexity of Material Modelling in the Design Optimization of Elastomeric Seals” Finite Element Analysis of Elastomers Boast D Coveney VA Professional Engineering Publishing London 119 128 1999
- Gough, J. et al. “Determination of Constitutive Equations for Vulcanized Rubber” Finite Element Analysis of Elastomers Boast D Coveney VA Professional Engineering Publishing London 5 26 1999
- Lloyd-Lucas, F. D. “FEA of Rubber for Product Development” in Finite Element Analysis of Elastomers Boast D Coveney VA Professional Engineering Publishing London 153 167 1999
- Treloar, L. R. G. “Stress-Strain Data for Vulcanized Rubber Under Various Types of Deformation” 1940