While natural rubber is commonly considered as an incompressible material, this study shows how carbon black-reinforced natural rubber (NR-CB), when subjected to various mechanical loading conditions (uniaxial, hydrostatic, monotonic, cyclic), is affected by volume change. Experiments show a volume variation even for low straining values and a significant volume change for large elongations. Moreover, volume change can be either reversible or not, depending on the loading conditions. It is related to a competition between void growth, chain orientation, and stress softening. At a microscopic scale, in situ Scanning Electron Microscopy (SEM) examinations and image analysis allow one to record damage and microscopic volume change as a function of elongation. Therefore the volume change measured at the microscopic scale is equal to the macroscopic one. Based on the experimental results, this paper shows that the hypothesis of incompressibility is worth being revisited. Thus, a nearly compressible approach was considered, where the strain energy is assumed to be the sum of spherical and deviatoric parts that are both affected by damage. The model was then implemented in a finite-element code. Good agreement was obtained between experimental results and model predictions for low triaxiality test conditions.
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@article{CRMECA_2014__342_5_299_0,
author = {Sabine Cantournet and Khaled Layouni and Lucien Laiarinandrasana and Roland Piques},
title = {Experimental investigation and modelling of compressibility induced by damage in carbon black-reinforced natural rubber},
journal = {Comptes Rendus. M\'ecanique},
pages = {299--310},
publisher = {Elsevier},
volume = {342},
number = {5},
year = {2014},
doi = {10.1016/j.crme.2014.02.005},
language = {en},
}
TY - JOUR AU - Sabine Cantournet AU - Khaled Layouni AU - Lucien Laiarinandrasana AU - Roland Piques TI - Experimental investigation and modelling of compressibility induced by damage in carbon black-reinforced natural rubber JO - Comptes Rendus. Mécanique PY - 2014 SP - 299 EP - 310 VL - 342 IS - 5 PB - Elsevier DO - 10.1016/j.crme.2014.02.005 LA - en ID - CRMECA_2014__342_5_299_0 ER -
%0 Journal Article %A Sabine Cantournet %A Khaled Layouni %A Lucien Laiarinandrasana %A Roland Piques %T Experimental investigation and modelling of compressibility induced by damage in carbon black-reinforced natural rubber %J Comptes Rendus. Mécanique %D 2014 %P 299-310 %V 342 %N 5 %I Elsevier %R 10.1016/j.crme.2014.02.005 %G en %F CRMECA_2014__342_5_299_0
Sabine Cantournet; Khaled Layouni; Lucien Laiarinandrasana; Roland Piques. Experimental investigation and modelling of compressibility induced by damage in carbon black-reinforced natural rubber. Comptes Rendus. Mécanique, Volume 342 (2014) no. 5, pp. 299-310. doi : 10.1016/j.crme.2014.02.005. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2014.02.005/
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