On the determination of the critical J-integral in rubber-like materials by the single specimen test method

摘要

Highlights?Experimental and numerical estimations ofηare obtained for SENT and PS specimens.?ηfactor is strongly material- and load level-dependent for hyperelastic materials.?The previously reported unit value ofηfor the pure shear specimen is faultful.AbstractThe applicability of SENT and PS specimen geometries for single-specimen determination ofJ-integral in rubber-like materials based uponηfactor is numerically and experimentally investigated. Bothηandη?are shown to be strongly material- and load level-dependent. So, a unique constant value for these parameters could not be presented. For the PS specimen, it is shown that the previously reported unit value for theηfactor is not correct. However, compared to the multiple-specimen results, reliable single-specimen estimations ofJccould still be obtained using the numerically calculatedηvalues if appropriate constitutive parameters have been already provided.]]>