Drilling-Induced Damages in Hybrid Carbon and Glass Fiber-Reinforced Composite Laminate and Optimized Drilling Parameters

Abstract

Hybrid carbon and glass fiber-reinforced composites have attracted significant research interest for primary load-bearing structural components in the field of aviation manufacturing owing to their low weight and high strength to weight ratio. However, the anisotropic and heterogenic nature of carbon and/or glass fiber-reinforced composite prevents high machining quality due to the directionality effect of fibers in the polymer matrix. As such, this study investigates the effect of drilling process for hybrid fiber-reinforced composite and reports optimal drilling parameters to improve the drill quality. Experimental studies indicate that an increased point angle (i.e., from 80° to 120°) resulted in low delamination upon entry due to reduced thrust force, which in turn produces better surface finish with minimal tool wear. The optimal feed rate (0.2 mm/min) ensures lower delamination at entry, since higher feed rates can increase the thrust force due to elevation in the shear area or raise the self-generated feed angle, which in turn reduces the effective clearance angle. To this end, drilling parameters were optimized using Dandelion optimizer (DO)—a cutting-edge metaheuristic search algorithm (MSA). We report the excellent consistency of DO to solve the proposed drilling optimization problem while achieving promising results as ascertained by the small standard deviation values.

Effect of Vibration Direction on Two-Dimensional Ultrasonic Assisted Grinding-Electrolysis-Discharge Generating Machining Mechanism of SiCp/Al

“…The residual height is obvious, but the surface quality is improved. This proves that the intermittent impact of an abrasive on the surface of the workpiece under the action of axial ultrasonic vibration leads to an increase in the width of the pit, while the aluminum-based material is squeezed and the SiC particles are dragged and rolled under the action of the tangential ultrasonic vibration, resulting in pits and some defects [ 26 ]. The wall surface is smooth and uniform, and the bottom is flat in Figure 8 d. The surface morphology after processing has a main texture that is consistent with the relative movement of the tool and the workpiece, and the reciprocating grinding and ironing effects are remarkable.…”

Effects and Mechanism of Micro-Drilling Parameters on the Drilling Force and Hole Morphology of Sapindus mukorossi Seeds

“…First, an increase in feed rate increases the height of the residual drilling area. Second, an increase in drilling force increases the vibration amplitude of the drill bit, leading to the rupture of the wood-fiber structure of the seed shell and an increase in the burr of the hole wall, which affects the processing accuracy of the hole [24]. When the feed rate was greater than 0.05 mm/r, the hole diameter gradually increased with an increasing feed rate.…”

A green mediated synthesis of glass fiber‐nickel ferrite‐ polyaniline ternary composite: An excellent thermal stability and outstanding electromagnetic interference shielding performance

“…4 Glass fiber (GF) is a significant alternative among the different fibers accessible for developing an efficient composite 5,6 To enhance the mechanical characteristics of composites, different GF reinforcements have been developed 7,8 The mechanical behavior of a fiber-reinforced composite is driven and influenced by the strength and modulus of the fiber, the excellent biocompatibility of the matrix, the strength of the matrix and the interface bonding between the fiber and matrix. Because of their high specific strength, flexibility, and ecological resilience, GF composite materials find widespread commercial applications including the maritime and pipe sectors and in aerospace applications involving radar, elevator, fuselage, and landing gear doors [9][10][11][12] The fiber ferrite composites are found to be efficient materials for EMI shielding applications. The strategic method for the synthesize of this binary composite involves the addition of ferrite nanoparticles to a presoaked fiber in a suitable medium.…”