Large-strain 3D-analysis of fibre-reinforced composites using rebar elements: hyperelastic formulations for cords

✍ Scribed by G. Meschke; P. Helnwein

• Book ID: 104734646
• Publisher: Springer
• Year: 1994
• Tongue: English
• Weight: 941 KB
• Volume: 13
• Category: Article
• ISSN: 0178-7675
• DOI: 10.1007/bf00350227

✦ Synopsis

The well-known finite element representation of reinforcing bars by means of overlay ("rebar") elements is recast in the context of finite strain analyses of cord-reinforced composite materials. The variational formulation including the linearized forms is presented on the basis of hyperelasticity. Three material laws including two variants of the Neo-Hooekean model and the quadratic logarithmic model are investigated. An explicit formulation for uniaxial stress states is given for the Neo-Hooekean model. A comparative evaluation with regards to computational efficiency and physical plausibility shows that the logarithmic model is optimally suited for this class of problems and for moderately large strains. The rebar-element concept in conjunction with an incompressible finite element formulation for the representatien of a rubber matrix material is applied to comparative finite strain FE-analyses of a cord-reinforced rubber sandwich panel, with different hyperelastic models used for modelling of the ply material.