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Rupture assessment of rubber/clay nanocompositescontaining a crack by means of an energy-basedfracture criterion

Heydari-Meybodi Mahdi, Ayatollahi Majid Reza, Berto Filippo, Yahya M. Yazid

Archives of Civil and Mechanical Engineering

2019

Vol. 19, no. 4

1458--1467

Due to the growing use of nanotechnology in the modern era, the application of nanoma-terials in elastomers has also been increased. Although some limited experiments areavailable in the previous studies regarding the fracture behavior of rubber nanocomposiDue to the growing use of nanotechnology in the modern era, the application of nanoma-terials in elastomers has also been increased. Although some limited experiments areavailable in the previous studies regarding the fracture behavior of rubber nanocompositescontaining a crack, no criteria have been presented so far. To fill this gap, the currentresearch is devoted to develop a criterion for rupture assessment of rubber nanocompositesweakened by a crack. First, some fracture tests are performed on cracked rubber/claynanocomposites. The prepared nanocomposites are made of ethylene–propylene-dienemonomer/styrene-butadiene rubber/CLOISITE 15. Afterwards, the averaged strain energydensity (ASED) criterion, as one of the most used energy-based criteria, is extended andutilized in nano-reinforced hyperelastic materials. The nearly uniaxial state of stress fieldnext to the crack tip in rubber nanocomposites, which is the main prerequisite for thecriterion extension, is proved by means of non-linear finite element modelling. Finally, theestimations of the criterion is compared with the corresponding experimental data and goodagreement is achieved which reveals the high performance of the ASED criterion in the caseof cracked rubbers filled with nanoparticles.tescontaining a crack, no criteria have been presented so far. To fill this gap, the currentresearch is devoted to develop a criterion for rupture assessment of rubber nanocompositesweakened by a crack. First, some fracture tests are performed on cracked rubber/claynanocomposites. The prepared nanocomposites are made of ethylene–propylene-dienemonomer/styrene-butadiene rubber/CLOISITE 15. Afterwards, the averaged strain energydensity (ASED) criterion, as one of the most used energy-based criteria, is extended andutilized in nano-reinforced hyperelastic materials. The nearly uniaxial state of stress fieldnext to the crack tip in rubber nanocomposites, which is the main prerequisite for thecriterion extension, is proved by means of non-linear finite element modelling. Finally, theestimations of the criterion is compared with the corresponding experimental data and goodagreement is achieved which reveals the high performance of the ASED criterion in the caseof cracked rubbers filled with nanoparticles.