Comprehensive study and analysis of mechanical properties of chopped carbon fibre reinforced nylon 66 composite materials
Comprehensive study and analysis of mechanical properties of chopped carbon fibre reinforced nylon 66 composite materials
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短切碳纤维增强尼龙66复合材料力学性能综合研究分析
DOI：
10.1016/j.matpr.2020.10.828
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
V. Kakhandki
中科院分区：
文献类型：
--
作者：
Dilip Choudhari;V. Kakhandki
近年来，短切碳纤维聚合物复合材料的应用迅速增加，大多数由这些材料制成的部件都承受循环载荷。它具有重量轻、比拉伸强度高、模量高、比刚度高等机械性能，耐磨性突出，成型时间短，可回收性高，用于汽车和飞机的结构件。在所有复合材料制造方法中，注射成型工艺可以适当控制短切碳纤维和尼龙66不同体积分数和重量百分比的工艺和能力。从制造方法观察，复合材料的加工性能提高，时间效率高，复合材料的相容性和界面良好。与碳钢相比，短切碳纤维增强尼龙66复合材料的强度通过混合法规则计算。对于 30% 短切碳纤维增强尼龙 66 复合材料，观察到最佳拉伸和弯曲强度。同样，对于 60% 短切碳纤维增强尼龙 66 复合材料，观察到最佳压缩强度。复合材料的重量比碳钢轻 5.54 倍。此外，FESEM 结果表明，对于普通样品没有表面损伤。拉伸试验时，大部分纤维被拉出，部分纤维因断裂而断裂。在弯曲测试过程中，观察到碳纤维碎片、压碎、碳纤维与基体之间分层的更严重损坏。同样，在压缩测试过程中，由于较高的压缩力，短切碳纤维与基体之间发生了很强的粘合，导致没有太大的损坏，只有小凹槽和空隙。
In recent years, applications of chopped carbon fibre polymer composites have been rapidly increasing and the majority of the components made from these materials are subjected to cyclic loading. It is used for the structural parts of automobiles and aircraft due to their high mechanical properties such as light weight, high specific tensile strength, high modulus, and high specific stiffness, outstanding wear resistance, short moulding times and high recyclability. Among all composites manufacturing methods, injection moulding processes can properly control the process and ability of different volume fraction by weight percentage of chopped carbon fibre and nylon 66. It was observed from manufacturing methods that improved processability, high time efficiency, good compatibility and interface of the composite materials.Strength is calculated by rule of mixture method for chopped carbon fibre reinforced nylon 66 composites compared to carbon steel. For 30% chopped carbon fibre reinforced nylon 66 composites optimum tensile and flexural strength are observed. Similarly, for 60% chopped carbon fibre reinforced nylon 66 composites optimum compression strength are observed. The weight of composites was found to be 5.54 times lighter than carbon steel. Further, FESEM results show that for plain specimens has no surface damage. During the tensile test, most of the fibres were pulled out and some of them break out due to fracture. During the flexural test, more severe damage to fragmented carbon fibres, crushed, delaminating between carbon fibres and matrix was observed. Similarly, during compression test, strong adhesion of bonding between the chopped carbon fibres and matrix occurs, due to higher compression force, resulting in no much damage but only small groves and voids.