This paper investigates carbon nano tube’s (CNTs) effect in the mixed-mode inter-laminar fracture response of glass fibre reinforced epoxy laminates. Laminates are prepared by adding 1%, 2% and 3% of CNTs with matrix by weight. Modified arcan fixture has been employed to generate the data for Mode I, Mode II, and various mixed-mode ratios. Loading angle has varied from 0 to 90 in steps of 15, and the generated data was reduced by applying correcting factors to get toughness value. Periodic function model was employed to estimate the elastic constants for data reduction. Loading angle, Proportion of Carbon Nano Tube, Crack length ratio, Stress intensity factor and Energy release rate are taken as the variables for discussion. Fractured surfaces are also captured with scanning electron microscopy to study the influence of Carbon Nano Tube in inter-laminar fracture. Genuineness of specimen and fixture on exhibiting mixed mode fracture load at crack tip, was verified before proceeding the characterization. Fracture resistance was enhanced from 2.95% to 5.24% and critical load at fracture was increased from 17.47% to 22.79% with Carbon Nano Tube addition compared to the neat GFRP specimens. Enhancement is high for 1% addition, and enhancement rate decreases after further reserves. Failure assessment study was also conducted on specimens and elliptical failure criteria was noted as the best one for defining mixed mode fracture of CNT filled glass epoxy specimens.

本文研究了碳纳米管 (CNT) 在玻璃纤维增​​强环氧树脂层压板的混合模式层间断裂响应中的影响。层压板是通过添加 1%、2% 和 3% 的碳纳米管与基体重量来制备的。已采用修改的 arcan 夹具来生成模式 I、模式 II 和各种混合模式比率的数据。加载角从 0 到 90 以 15 为步长变化，并且通过应用校正因子来减少生成的数据以获得韧性值。使用周期函数模型来估计数据简化的弹性常数。加载角、碳纳米管的比例、裂纹长度比、应力强度因子和能量释放率作为讨论的变量。断裂表面也用扫描电子显微镜捕获，以研究碳纳米管对层间断裂的影响。在进行表征之前，验证了试样和夹具在裂纹尖端表现出混合模式断裂载荷的真实性。与纯 GFRP 试样相比，添加碳纳米管的抗断裂性从 2.95% 提高到 5.24%，断裂临界载荷从 17.47% 增加到 22.79%。添加1%增强率高，进一步储备后增强率下降。还对试样进行了失效评估研究，椭圆失效标准被认为是定义 CNT 填充玻璃环氧树脂试样混合模式断裂的最佳标准。在进行表征之前进行了验证。与纯 GFRP 试样相比，添加碳纳米管的抗断裂性从 2.95% 提高到 5.24%，断裂临界载荷从 17.47% 增加到 22.79%。添加1%增强率高，进一步储备后增强率下降。还对试样进行了失效评估研究，椭圆失效标准被认为是定义 CNT 填充玻璃环氧树脂试样混合模式断裂的最佳标准。在进行表征之前进行了验证。与纯 GFRP 试样相比，添加碳纳米管的抗断裂性从 2.95% 提高到 5.24%，断裂临界载荷从 17.47% 增加到 22.79%。添加1%增强率高，进一步储备后增强率下降。还对试样进行了失效评估研究，椭圆失效标准被认为是定义 CNT 填充玻璃环氧树脂试样混合模式断裂的最佳标准。