Abstract
AbstractThe purpose of this research work is to investigate the fracture behavior of two carbon-black filled elastomers, NR and SBR, using the Finite Elements Method (FEM). For the Finite Element (FE) analysis, we have identified the hyperelastic potential of the no pre-cracked materials using equal biaxial and pure shear tests. Then, two FE models with pre-cracked specimens, using Ansys software, are established. The investigated parameters are obtained with specimens of Single Edge Notched in Tension (SENT) and Pure Shear (PS). Comparison of the obtained results is examined as a function of the J integral, of Rice’s theory, and the tearing energy T, introduced by Rivlin and Thomas. Through the numerical and analytical analysis, of fracture behavior in rubber materials NR and SBR, carried out on SENT and PS specimens, the mainly obtained conclusions will be: (i) the J-integral calculated far from the deformed crack tip is independent of the chosen contour; (ii) the J-integral for PS specimen, contrary to the SENT specimen, is not affected by the crack size; (iii) the difference of the values of the energy parameters J and T are related to the geometry effects.KeywordsFilled rubbersNR and SBRTearing energy TJ-integralSENT and PS samplesFEM
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