Rubber material viscous and superelastic constitutive model building method considering correlation effect

Abstract

The invention discloses a rubber material viscous and superelastic constitutive model building method considering a correlation effect. The method comprises the following steps of obtaining stress-strain of a rubber material through quasi-static uniaxial tension experiment; performing impact uniaxial tension experiment through an SHTB (split hopkinson tension bar) device to obtain the stress-strain of the rubber material at a high strain rate; obtaining corresponding response rules and deformation characteristics according to the stress-strain, obtained through the quasi-static uniaxial tension experiment and the impact uniaxial tension experiment, of the rubber material; building a viscous and superelastic constitutive model of the rubber material. The method has the advantages that by aiming at the study on the tensile mechanical property of the rubber material, the viscous and superelastic constitutive model of the rubber material is built; reference is provided for the study on the tensile mechanical property of the rubber material; the problem of mechanical characterization difficulty of the rubber material at different strain rates is solved.

Description

technical field [0001] The invention belongs to the technical field of research on tensile mechanical properties of rubber materials, and in particular relates to a modeling method of a visco-hyperelastic constitutive model of rubber materials considering correlation effects. Background technique [0002] The constitutive study of rubber materials should include hyperelasticity and viscoelasticity. At present, the research on the tensile mechanical properties of rubber is often limited to hyperelasticity, and the limited research on rubber rate-dependent constitutive models is to combine hyperelastic constitutive models and viscoelastic constitutive models, such as H.Pouriayevali et al. The constitutive equation is expressed in a form independent of the coordinate system, and a constitutive model describing the viscohyperelasticity of rubber materials is proposed. However, due to the introduction of polynomials composed of strain invariants in the modeling process, there are...

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Problems solved by technology

[0003] The object of the present invention is to provide a kind of modeling method of the rubber material visco-hyperelastic constitutive model that considers correlation effect, aim at the research of rubber material tensile mechanical properties, set up the rubber material visco-hyperelastic constitutive model, for the rubber material tension Provide a reference for the study of mechanical properties, and solve the problem of mechanical characterization of rubber materials under different strain rates

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