Sensitivity analysis of abrasive air-jet machining parameters on machinability of carbon and glass fiber reinforced hybrid composites
Sensitivity analysis of abrasive air-jet machining parameters on machinability of carbon and glass fiber reinforced hybrid composites
复制标题
DOI：
10.1016/j.mtcomm.2020.101624
复制
发表时间：
2020-12-01
影响因子：
3.8
通讯作者：
Nayak, Ramesh Kumar
中科院分区：
文献类型：
--
作者：
Jesthi, Dipak Kumar;Nayak, Ramesh Kumar
碳纤维和玻璃纤维增强环氧树脂混杂复合材料有助于定制复合材料的力学性能。然而，混杂纤维增强聚合物复合材料的加工是一个挑战，传统的工艺，由于不同类型的纤维增强材料和各向异性的复合材料。研究人员和科学家已经通过磨料水射流加工和磨料空气射流加工评估了普通或单纤维增强聚合物复合材料的可加工性。因此，本研究的重点是对称混杂复合材料的开发，混杂复合材料的机械性能和加工的磨料空气射流加工（AAJM）的评价。用手糊法制备的混杂复合材料有[C]10和[G]10纤维增强聚合物复合材料、[CG] 3C增强聚合物复合材料和[CG] 2C增强聚合物复合材料等沿着。结果表明，[CG_2CG]S型混杂复合材料具有最佳的拉伸强度和弯曲强度。因此，[CG 2 CG]S型混杂复合材料沿着与普通玻璃和碳纤维增强聚合物复合材料被认为是可加工性研究。采用响应曲面法（RSM）研究了AAJM工艺参数对材料去除率（MRR）、切削深度（DOC）和表面粗糙度（Ra）的敏感性，并进行了优化。用响应面模型预测[CG（2）CG]S型混杂复合材料的最佳加工工艺输出为MRR = 3.26 × 10（-3）g/sec，DOC = 1.48 mm，表面粗糙度Ra = 1.48 μ m。将模型预测结果与实验值进行了比较，发现两者吻合较好。在扫描电子显微镜下观察了复合材料钻孔试样的表面形貌。据观察，复合材料的钻孔表面的表面损伤是最小的。因此，磨料空气射流加工工艺可以用于聚合物基复合材料的钻孔，以克服传统的加工问题。
Carbon and glass fiber reinforced epoxy polymer hybrid composites facilitate to tailor the mechanical properties of the composites. However, the machining of hybrid fiber reinforced polymer composite is a challenge by conventional processes due to the different types of fiber reinforcements and anisotropic nature of composites. Researchers and scientists have evaluated the machinability of plain or single fiber reinforced polymer composites through abrasive water jet machining and abrasive air jet machining. Therefore, the present investigation emphasizes on the development of symmetrical hybrid composites, evaluation of mechanical properties and machining of the hybrid composites through abrasive air jet machining (AAJM). There are three types of hybrid composites such as C2G3]S, [CG3C]S and [CG2CG]S along with plain glass ([G]10) and carbon ([C]10) fiber reinforced polymer composites fabricated by hand lay-up technique. It is observed that the [CG2CG]S type hybrid composite has the optimum tensile and flexural strength as compared to other composites. Hence, [CG2CG]S type hybrid composites along with plain glass and carbon fiber reinforced polymer composites was considered for the machinability study. The sensitivity of AAJM process parameters on material removal rate (MRR), depth of cut (DOC) and surface roughness (Ra) are investigated and optimized through response surface methodology (RSM). The optimum machining process output predicted by the RSM model for [CG(2)CG]S type hybrid composite is MRR = 3.26 x 10(-3) g/sec, DOC = 1.48 mm and surface roughness (Ra) = 1.48 mu m. The predicted model results compared with the experimental values and found a good agreement between them. The surface morphology of the drilled composite sample is investigated under scanning electron microscope. It is observed that the surface damage of the drilled surface of the composites is minimal. Thus, the abrasive air jet machining process can be employed for drilling of polymer matrix composites to overcome the conventional machining issues.