Genetic Optimization of Machining Parameters Affecting Thrust Force during Drilling of Pineapple Fiber Composite Plates – an Experimental Approach

ABSTRACT

Natural fibers replace synthetic reinforcing fibers in polymer composites due to its biodegradability, strength, and satisfactory adhesion to the polymer matrix. Pineapple unidirectional fiber mats were reinforced in epoxy resin to fabricate pineapple fiber reinforced epoxy composite. Drilling experiments were conducted under different conditions of machining by Taguchi L₂₇ orthogonal array. The thrust force exerted on the composite during drilling was studied and correlated with the machining parameters. Statistical modeling was done to establish the mathematical relationship between the input parameters and output responses. Genetic algorithm was used for optimizing thrust force. It was found that the highest speed, lowest feed, and lowest drill diameter were found to give the minimal thrust force.

摘要

天然纤维由于其可生物降解性、强度和与聚合物基体的良好附着力，在聚合物复合材料中取代了合成增强纤维. 将菠萝单向纤维毡在环氧树脂中增强，制备菠萝纤维增强环氧树脂复合材料. 采用田口L27正交阵列，在不同的加工条件下进行了钻孔试验. 研究了复合材料在钻削过程中所受的推力，并与加工参数进行了关联. 通过统计建模，建立输入参数与输出响应之间的数学关系. 采用遗传算法对推力进行优化. 结果表明，最高转速、最小进给量和最小钻头直径可使推力最小.

KEYWORDS:

• Pineapple fiber
• polymer composite
• genetic optimization
• drilling parameters

关键词:

• 菠萝纤维
• 聚合物复合材料
• 遗传优化
• 钻井参数