Abstract This study is focused on numerical investigation on fracture behaviors of carbon black (CB) and silica filled elastomeric composites. Finite element analysis (FEA) in compliance with multi-specimen method is used to calculate J-integral and geometry factor of the rubber composites up to a displacement of 20 mm for single edge notch in tension (SENT) and double edge notch in tension (DENT) specimens. An empirical relationship between crack tip opening displacement (CTOD) and crack advancement is established depending on notch to width ratio (NWR). The stress contours across the notches for SENT and DENT specimens is discussed briefly. It is found that fracture propagation resistance of CB filled elastomer is 125% more than that of silica filled elastomer. Although, Silica filled elastomer have good tensile strength and crosslink density but it fails to replace carbon black in terms of fracture properties. The critical J-integral for CB filled elastomer is 18.7 % and 32.2 % more than silica filled elastomer for SENT and DENT specimens respectively. The effect of specimen type on various fracture properties is also explored. The factor of safety is found to be significantly more in case of CB filled elastomers making them less vulnerable to crack propagation and catastrophic failure.

中文翻译：

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基于有限元方法的炭黑和二氧化硅填充弹性体的比较断裂评估：碳质填料在柔性复合材料中的增强功效

摘要 本研究的重点是对炭黑 (CB) 和二氧化硅填充弹性复合材料的断裂行为进行数值研究。使用符合多试样方法的有限元分析 (FEA) 计算橡胶复合材料的 J 积分和几何因子，对于单边拉伸缺口 (SENT) 和双边拉伸缺口 (SENT)，位移可达 20 mm。 DENT) 标本。根据缺口宽度比 (NWR) 建立裂纹尖端张开位移 (CTOD) 和裂纹推进之间的经验关系。简要讨论了 SENT 和 DENT 试样缺口上的应力等值线。发现CB填充弹性体的断裂扩展阻力比二氧化硅填充弹性体高125%。虽然，二氧化硅填充弹性体具有良好的拉伸强度和交联密度，但在断裂性能方面无法替代炭黑。对于 SENT 和 DENT 试样，CB 填充弹性体的临界 J 积分分别比二氧化硅填充弹性体高 18.7% 和 32.2%。还探讨了试样类型对各种断裂特性的影响。发现 CB 填充弹性体的安全系数要高得多，使它们不易受到裂纹扩展和灾难性故障的影响。