Tools for multiaxial validation of behavior laws chosen for modeling hyper-elasticity of rubber-like materials
نویسندگان
چکیده
We present an experimental approach to discriminate hyper-elastic models describing the mechanical behavior of rubber-like materials. An evaluation of the displacement field obtained by digital image correlation allows us to evaluate the heterogeneous strain field observed during these tests. We focus on the particular case of hyper-elastic models to simulate the behavior of some rubber-like materials. Assuming incompressibility of the material, the hyper-elastic potential is determined from tension and compression tests. A biaxial loading condition is obtained in a multiaxial testing machine and model predictions are compared with experimental results.
منابع مشابه
Constitutive modelling of hyperelastic rubber-like materials
The simulation of rubber-like material behaviour by means of the finite element method has been described in this study. Proper material models were selected for the numerical description of static hyper-elasticity. The combinations of a continuum damage mechanics concept and a pseudo-elastic concept with Gao’s elastic law were used to simulate the ideal Mullins effect. Furthermore, a specific ...
متن کاملRubber/Carbon Nanotube Nanocomposite with Hyperelastic Matrix
An elastomer is a polymer with the property of viscoelasticity, generally having notably low Young's modulus and high yield strain compared with other materials. Elastomers, in particular rubbers, are used in a wide variety of products ranging from rubber hoses, isolation bearings, and shock absorbers to tires. Rubber has good properties and is thermal and electrical resistant. We used carbon ...
متن کاملDissipative and coupling effects accompanying the natural rubber elongation
Rubber-like materials can undergo very large strains in a quasi-reversible way. This remarkable behavior is often called hyper (or entropic) elasticity. However, the presence of mechanical loops during a load-unload cycle is not consistent with a purely elastic behavior modeling. Using Digital Image Correlation and Infra-Red Thermography, the present study aims at observing and quantifying diss...
متن کاملEnergetic elasticity models for soft biological tissue: Role of the elastica
Strain energy functions for currently-used soft biological tissue have two main origins. Some have been adopted from the rubber elasticity and polymer elasticity literature, and others have functional forms that have been chosen to reproduce the characteristic locking behavior observed in experiments (Holzapfel and Ogden, 2006). Among the rubber/polymer elasticity models are micromechanically-d...
متن کاملEvaluation of Ultimate Torsional Strength of Reinforcement Concrete Beams Using Finite Element Analysis and Artificial Neural Network
Due to lack of theory of elasticity, estimation of ultimate torsional strength of reinforcement concrete beams is a difficult task. Therefore, the finite element methods could be applied for determination of strength of concrete beams. Furthermore, for complicated, highly nonlinear and ambiguous status, artificial neural networks are appropriate tools for prediction of behavior of such states. ...
متن کامل