A Review of Volume Changes in Rubbers: The Effect of Stretching

Cam, Jean‐Benoît Le

doi:10.5254/1.3525684

Cited by 47 publications

(17 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The mechanical response of rubber‐like materials is governed by numerous physical phenomena: rate‐dependent effects, permanent set, stress softening, mechanical hysteresis, strain‐induced crystallization (SIC), energy storage, anisotropic effects, change in volume, and the competition between entropy and isentropy at low strains . It should be noted that most of these phenomena are induced or amplified by adding fillers in the rubber matrix.…”

Section: Mechanical Behavior Of Rubber‐like Materials and Classical Tmentioning

confidence: 99%

Inverse identification of constitutive parameters from heat source fields: A local approach applied to hyperelasticity

Charlès

Cam

2020

Strain

View full text Add to dashboard Cite

In this paper, a new inverse identification method of constitutive parameters is developed from full kinematic and thermal field measurements. It consists in reconstructing the heat source field from two different approaches by using the heat diffusion equation. The first one requires the temperature field measurement and the value of the thermophysical parameters. The second one is based on the kinematic field measurement and the choice of a thermo‐hyperelastic model that contains the parameters to be identified. The identification is carried out at the local scale, ie, at any point of the heat source field, without using the boundary conditions. In the present work, the method is applied to the challenging case of hyperelasticity from a heterogeneous test. Due to large deformations undergone by the rubber specimen tested, a motion compensation technique is developed to plot the kinematic and the thermal fields at the same points before reconstructing the heterogeneous heat source field. In the present case, the constitutive parameter of the Neo‐Hookean model has been identified, and its distribution has been characterized with respect to the strain state at the surface of a cross‐shaped specimen.

show abstract

Section: Mechanical Behavior Of Rubber‐like Materials and Classical Tmentioning

confidence: 99%

Inverse identification of constitutive parameters from heat source fields: A local approach applied to hyperelasticity

Charlès

Cam

2020

Strain

View full text Add to dashboard Cite

show abstract

“…Hence, in addition to the macroscopic mechanical behaviour, it is of great importance to investigate the effect of the strain rate on associated damage mechanisms in filled elastomers as they are at the origin of rubber macroscopic failure. Damage being associated with void creation, it generates a raise of volumetric strain easily accessible by Digital Image Correlation (DIC) [11], [12], [13], [14]. Investigations on damage in elastomers are commonly conducted in quasi-static conditions, i.e.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Strain Rate on Damage in Filled EPDM During Single and Cyclic Loadings

Candau¹,

Oğuz²,

Peuvrel‐Disdier³

et al. 2020

Preprint

View full text Add to dashboard Cite

The effect of the strain rate on damage in carbon black filled EPDM stretched during single and multiple uniaxial loading is investigated. This has been performed by analysing the stress-strain response, the evolution of damage by Digital Image Correlation (DIC), the associated dissipative heat source by InfraRed thermography (IR), and the chains network damage by swelling. The strain rates were selected to cover the transition from quasi-static to medium strain rate conditions. In single loading conditions, the increase of the strain rate yields in a preferential damage of the filler network while rubber network is preserved. Such damage is accompanied by a stress softening and an adiabatic heat source rise. Conversely, increasing the strain rate in cyclic loading conditions yields in a filler network accommodation and a high self-heating whose combined effect is proposed as a possible cause of the ability of filled EPDM to limit damage, by reducing cavities opening during loading and favoring cavities closing upon unloading.

show abstract

“…It has a significant influence on the production and application of the affected materials, which strongly motivates its experimental investigation and numerical simulation. The experimental characterization of the process relies on techniques such as volume change measurements [43], electron microscopy [58], small-angle X-ray scattering [40], and terahertz spectroscopy [65]. However, the most frequently used technique is the in situ wide-angle X-ray diffraction.…”

Section: Introductionmentioning

confidence: 99%

Thermomechanical Modeling of Microstructure Evolution Caused by Strain-Induced Crystallization

Aygün

Klinge

2020

Polymers

View full text Add to dashboard Cite

The present contribution deals with the thermomechanical modeling of the strain-induced crystallization in unfilled polymers. This phenomenon significantly influences mechanical and thermal properties of polymers and has to be taken into consideration when planning manufacturing processes as well as applications of the final product. In order to simultaneously capture both kinds of effects, the model proposed starts by introducing a triple decomposition of the deformation gradient and furthermore uses thermodynamic framework for material modeling based on the Coleman–Noll procedure and minimum principle of the dissipation potential, which requires suitable assumptions for the Helmholtz free energy and the dissipation potential. The chosen setup yields evolution equations which are able to simulate the formation and the degradation of crystalline regions accompanied by the temperature change during a cyclic tensile test. The boundary value problem corresponding to the described process includes the balance of linear momentum and balance of energy and serves as a basis for the numerical implementation within an FEM code. The paper closes with the numerical examples showing the microstructure evolution and temperature distribution for different material samples.

show abstract

A Review of Volume Changes in Rubbers: The Effect of Stretching

Abstract: International audienceA REVIEW OF VOLUME CHANGES IN RUBBERS: THE EFFECT OF STRETCHIN

Cited by 47 publications

References 45 publications

Inverse identification of constitutive parameters from heat source fields: A local approach applied to hyperelasticity

Inverse identification of constitutive parameters from heat source fields: A local approach applied to hyperelasticity

Effect of the Strain Rate on Damage in Filled EPDM During Single and Cyclic Loadings

Thermomechanical Modeling of Microstructure Evolution Caused by Strain-Induced Crystallization

Contact Info

Product

Resources

About