Crack Growth Behavior of Styrene-Butadiene Rubber, Natural Rubber, and Polybutadiene Rubber Compounds: Comparison of Pure-Shear Versus Strip Tensile Test

Abstract

Fatigue crack growth experiments on different carbon black–filled rubber compounds have been carried out to evaluate the influence of pure-shear and strip tensile testing mode by using sine and pulse as waveforms. In a previous set of experimental investigations regarding the influence of both waveform and tested material, it was found that the mode I of crack opening sometimes propagates too quickly to be properly monitored in tests involving strip-tensile specimens. An alternative test methodology based on pure-shear test mode has been investigated, optimizing both the shape of the specimen and the test equipment. Data obtained from the different compound formulations were consistent with the theoretical background and resulted in similar ranking of compound crack growth resistance for the two testing modes; in addition, pure-shear mode showed a higher sensitivity to formula variations.

Relationship between dynamic fatigue crack propagation properties and viscoelasticity of natural rubber/silicone rubber composites

“…2(b) and initial specimen height (h 0 ), so its dc/dN would not be affected by the crack length. [18][19][20]…”

Configuration of Novel Experimental Fractographic Reverse Engineering Approach Based on Relationship between Spectroscopy of Ruptured Surface and Fracture Behaviour of Rubber Sample

“…The increase of fracture resistance by modifying the structure of materials is an important objective of materials science not only for structural materials such as steel, but also for highly deformable rubbery materials. Therefore, improving the crack growth resistance of rubber materials has been a very important goal in the rubber industry for a long time [ 1 , 2 , 3 ].…”

Multiaxial deformation and strain-induced crystallization around a fatigue crack in natural rubber

“…The geometry of the samples is a classical "pure shear" geometry (also known as planar tension samples), commonly employed for fatigue crack growth tests [9][10][11]. The dimensions are reported in Fig.…”