Hyperelastic model analysis of stress-strain behavior in polybutadiene/ethylene-propylene diene terpolymer nanocomposites

Abstract

Micromechanics of elastomer nanocomposite samples based on polybutadiene (BR), ethylene‐propylene diene terpolymer (EPDM) hyperelastic matrixes prepared via melt compounding was investigated using uniaxial tensile analysis. Constitutive hyperelastic models, including Polynomial, Yeoh, Ogden, Arruda‐Boyce, and Van der Waals were used to determine material parameters in incompressible isotropic elastic strain‐energy functions on the basis of a nonlinear least squares optimization method by fitting the data obtained from uniaxial classic experiments. Effect of nanoclay (0, 3, 5, 7, and 10 phr) content on the simulation accuracy was investigated. Simulation results compared with the experimental data suggested that the Ogden model as the most consistent model investigated here. J. VINYL ADDIT. TECHNOL., 23:21–27, 2017. © 2015 Society of Plastics Engineers

An investigation into hyper‐elastic behavior of BR/epoxy‐polyester hybrid/nanoclay nanocomposites

“…Esmizadeh et al could show the remarkable impact of nanofiller content on the degree of agreement between experimental data and theoretical data using prediction of hyperelastic models in PVC/NBR/Organoclay nanocomposites. Similar behavior was also observed for NR/EPDM and BR/EPDM nanocomposites .…”

Comparative Analysis of Polyurethane Drive Belts with Different Cross-Section Using Thermomechanical Tests for Modeling the Hot Plate Welding Process

“…Under the influence of cyclically applied mechanical stresses, the chains are ordered, and the entropy of the system is reduced. As a result, the material obtains a stable structure, which is characterized by the fact that the values of the mechanical properties do not change with the passage of successive load cycles [ 52 , 69 , 70 , 71 ].…”

“…The observed increase in the shear storage modulus G ′ and the shear loss modulus G ″, as well as the loss angle δ and the associated glass transition temperature of soft segments T g SS , occurring to a comparable extent for both belt types, as a function of successive cycles of thermal load change, follows from two findings: The migration of plasticizing additive or additional chemical compounds added to polyurethane (diisocyanates, polyols, chain extenders) that takes place after the sample is heated in the first cycle [ 72 , 73 ], The processes of material structure relaxation that take place after the first cycle. As in the case of tests at the standard temperature of material usage [ 68 ], as a result of mechanical and thermal stresses cyclically applied, the sequencing of the chains and reduction of the entropy of the system occurs [ 52 , 55 , 71 , 73 ]. …”

“…The processes of material structure relaxation that take place after the first cycle. As in the case of tests at the standard temperature of material usage [ 68 ], as a result of mechanical and thermal stresses cyclically applied, the sequencing of the chains and reduction of the entropy of the system occurs [ 52 , 55 , 71 , 73 ].…”

Dispersion state and hyperelastic behavior of tire tread compounds reinforced with nanoclay: Uniaxial tensile and compression studies

“…Similar behavior, confirming the effect of nanoclay content on the model accuracy, was also observed for natural rubber/ethylene propylene diene monomer (NR/EPDM) and butadiene rubber/ethylene propylene diene monomer (BR/EPDM) binary nanocomposites while compounds ultimate elongation ratio did not exceed 300%. [12][13] In general, determination of model parameters is carried out by four groups of tests including uniaxial, equi-baiaxial, planar, and volumetric compression tests. [14] The first three test methods are used to evaluate the hyperelastic behavior and the last one is used to study the compressibility.…”