How to effectively perform equibiaxial tension for rubber materials?

IF 4.1 2区化学 Q2 POLYMER SCIENCE

Polymer Pub Date : 2025-03-08 DOI:10.1016/j.polymer.2025.128256

Qiang Zhang , Li Liu , Liqun Zhang , Fanzhu Li

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Abstract

The utilization of a reasonable rubber hyperelastic constitutive model (HCM) is fundamental to obtain high-precision simulation results for the reliability analysis and structural optimization of rubber products under complex working conditions. Equibiaxial tension (ET) is of importance for the material parameters identification of HCMs. To date, there is no ISO standard for ET test of rubber, nor is there a comprehensive account of the design of different ET testing methods. In this work, we focus on the fundamental challenges of ET, including (i) how to select the appropriate shape and size of rubber samples (square, cruciform-Ⅰ, cruciform-II and circular)? (ii) How to determine the reasonable strain gauge zone through optical extensometers or digital image correlation technique? (iii) How to determine the load-bearing area in the solution of nominal stress? The rationality of the uniform equibiaxial strain calibration area and the precise stress calibration area of square and circular shape samples were verified through experimental data of different rubber materials. This work could provide a theoretical support for the selection and optimization of ET testing methods for rubber materials.

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来源期刊

Polymer 化学-高分子科学

CiteScore

7.90

自引率

8.70%

发文量

959

审稿时长

32 days

期刊介绍： Polymer is an interdisciplinary journal dedicated to publishing innovative and significant advances in Polymer Physics, Chemistry and Technology. We welcome submissions on polymer hybrids, nanocomposites, characterisation and self-assembly. Polymer also publishes work on the technological application of polymers in energy and optoelectronics. The main scope is covered but not limited to the following core areas: Polymer Materials Nanocomposites and hybrid nanomaterials Polymer blends, films, fibres, networks and porous materials Physical Characterization Characterisation, modelling and simulation* of molecular and materials properties in bulk, solution, and thin films Polymer Engineering Advanced multiscale processing methods Polymer Synthesis, Modification and Self-assembly Including designer polymer architectures, mechanisms and kinetics, and supramolecular polymerization Technological Applications Polymers for energy generation and storage Polymer membranes for separation technology Polymers for opto- and microelectronics.