Rong Jigang, Yang Jun, Huang Youjian, Luo Wenbo, Hu Xiaoling
School of Packaging and Materials Engineering, Hunan University of Technology, Xiangtan 411105, China.
Zhuzhou Times New Material Technology Co., Ltd., Zhuzhou 412000, China.
Polymers (Basel). 2021 Nov 10;13(22):3891. doi: 10.3390/polym13223891.
Below the incipient characteristic tearing energy (), cracks will not grow in rubber under fatigue loading. Hence, determination of the characteristic tearing energy is very important in the rubber industry. A rubber cutting experiment was conducted to determine the , using the cutting method proposed originally by Lake and Yeoh. Then, a fatigue crack propagation experiment on a edge-notched pure shear specimen under variable amplitude loading was studied. A method to obtain the crack propagation rate d/d from the relationship of the crack propagation length (Δ) with the number of cycles () is proposed. Finally, the obtained from the cutting method is compared with the value decided by the fatigue crack propagation experiment. The values of obtained from the two different methods are a little different.
在初始特征撕裂能（）以下，橡胶在疲劳载荷下裂纹不会扩展。因此，特征撕裂能的测定在橡胶工业中非常重要。采用Lake和Yeoh最初提出的切割方法进行了橡胶切割实验以测定。然后，研究了在变幅载荷下边缘切口纯剪切试样的疲劳裂纹扩展实验。提出了一种根据裂纹扩展长度（Δ）与循环次数（）的关系获得裂纹扩展速率d/d的方法。最后，将切割方法得到的与疲劳裂纹扩展实验确定的值进行比较。两种不同方法得到的值略有不同。
