硫化胶直角撕裂性能评价新方法  

New evaluation method of angle tear property of vulcanizates

作　　者：张伟 杨文真 侯晓倩 ZHANG Wei;YANG Wen-zhen;HOU Xiao-qian(Sailun Group Co Ltd,Qingdao 266550,China)

机构地区：[1]赛轮集团股份有限公司,山东青岛266550

出　　处：《合成橡胶工业》2024年第3期187-191,共5页China Synthetic Rubber Industry

摘　　要：采用数值模拟和试验验证相结合的方法,对现行橡胶测试样条无割口直角形撕裂强度评价方法进行优化,首先通过仿真软件对橡胶测试样条不同夹持距离直角口处的撕裂能进行数值模拟,然后将先进视频引伸计与数字图像相关分析软件联用以获得测试样条的撕裂应变分布云图及多位置应变随时间的变化曲线,提出了结合应变分布云图和撕裂强度修正值综合评价胶料无割口直角撕裂性能的新方法,通过纯天然橡胶、天然橡胶/合成橡胶共混胶撕裂强度测试验证了该方法的适用性。结果表明,当测试样条其他参数相同、夹持距离不同时,其非有效测试区域的拉伸程度不同,直角口处撕裂能也不同,增加了测试结果的波动性。较之于现行标准,采用撕裂强度修正值可以减小平行测试结果的变异系数,其测试结果与胶料中炭黑分散度呈正相关。The combination method of numerical simulation and experimental verification was used to optimize the current evaluation method of tear strength of rubber unnicked angle test piece.Firstly,the tear energy at angle position of rubber test piece with different clamp distances was simulated by the simulation software,and then advanced video extensometer-digital image correlation analysis software was used to obtain the strain distribution cloud nephograms and the multi-location strain curves of the test piece with time.A new method was proposed to evaluate comprehensively the unnicked angle tear property by combining strain distribution cloud nephogram and corrected tear strength,and the method applicability was verified by the tear strength test of pure natural rubber and natural rubber/synthetic rubber blends.The results showed that the tensile degree of the non-effective test region and the tear energy at angle position were all different with the different clamp distances,when the other para-meters of the test piece were the same,which increased the volatility of the test results.Compared with the standard currently in effect,the variation coefficient of parallel test results could be reduced by using the corrected tear strength,and the test results was positively correlated with the carbon black dispersion in the vulcanizates.

关 键 词：硫化胶 无割口直角撕裂性能 先进视频引伸计与数字图像相关分析软件联用 数值模拟 变异系数 撕裂强度修正值 炭黑分散度 

分 类 号：TQ330.73[化学工程—橡胶工业]