Abstract This work provides a direct comparison of several experimental approaches used in the literature to measure fracture toughness of rubber of rubber using single edge notched in tension (SENT) specimens, with the final aim to provide guidelines for an optimal testing procedure. Digital image correlation measurements were used to get new insights into the fracture process. SENT is experimentally advantageous because of the simple preparation from laboratory plates and the small amount of material required. The most common experimental approaches to measure fracture toughness of rubber rely on the energy release rate, measured by the tearing energy or the J-integral parameters. This work points out the importance of experimental conditions and test procedures: long specimens and short notches are preferred, identification of fracture initiation from the front view is necessary, strain energy density should not be evaluated from un-notched specimens at the critical stretch level, rather alternative strategies are shown in this work.

中文翻译：

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SENT橡胶试样断裂韧性的实验测量

摘要 这项工作直接比较了文献中使用单边拉伸缺口 (SENT) 试样测量橡胶橡胶断裂韧性的几种实验方法，最终目的是为最佳测试程序提供指导。数字图像相关性测量用于获得对断裂过程的新见解。SENT 在实验上具有优势，因为它可以从实验室板中简单地制备，并且所需材料量很少。测量橡胶断裂韧性的最常用实验方法依赖于能量释放率，通过撕裂能或 J 积分参数来测量。这项工作指出了实验条件和测试程序的重要性：首选长试样和短缺口，