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首页> 外文期刊>Journal of mechanics of materials and structures >A NEW APPROACH FOR RUBBER NUMERICAL MODELING UNDER BIAXIAL TESTING CONDITIONS THOROUGH FINITE ELEMENT SIMULATION
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A NEW APPROACH FOR RUBBER NUMERICAL MODELING UNDER BIAXIAL TESTING CONDITIONS THOROUGH FINITE ELEMENT SIMULATION

机译：A NEW APPROACH FOR RUBBER NUMERICAL MODELING UNDER BIAXIAL TESTING CONDITIONS THOROUGH FINITE ELEMENT SIMULATION

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摘要

The framework of this study is to develop a methodology based on digital image correlation (DIC) applied in biaxial straining under large deformations to calibrate the rubber computational modeling by the finite element method (FEM). Since the material approaches incompressibility, different shape functions were adopted to describe the fields of pressure and displacements according to the finite element hybrid formulation. Biaxial experiments were performed in a cruciform machine and the applied methodology was validated through a classical bulge test. Despite the low biaxiality degree, reasonable results were obtained to nominal strain levels higher than 300, with the proposed methodology. A new method for obtaining the nominal stress-strain relationship was proposed using Abaqus software. The validation was conducted by numerical simulations and biaxial extension experiments.

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