Thrust force modelling and surface roughness optimization in drilling of AA-7075: FEM and GRA

AA7075 aluminum alloy attracts scientific interest to participate in production of crucial components in aerospace, construction and automotive domains. Specifically, final products need to display equal quality to ensure the basic standards of safety in the aircraft industry. Despite the high machi...

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Bibliographic Details
Published inJournal of mechanical science and technology Vol. 33; no. 10; pp. 4771 - 4781
Main Author Yaşar, Nafiz
Format Journal Article
LanguageEnglish
Published Seoul Korean Society of Mechanical Engineers 01.10.2019
Springer Nature B.V
대한기계학회
Subjects
Aircraft safety
Aluminum base alloys
Control
Cutting speed
Drilling
Dynamical Systems
Engineering
Feed rate
Finite element method
Industrial and Production Engineering
Machinability
Mathematical models
Mechanical Engineering
Optimization
Surface roughness
Thrust
Vibration
Weight reduction
기계공학
Finite element method
Drilling
Grey relational analysis
Multi-response optimization
AA7075
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Summary:AA7075 aluminum alloy attracts scientific interest to participate in production of crucial components in aerospace, construction and automotive domains. Specifically, final products need to display equal quality to ensure the basic standards of safety in the aircraft industry. Despite the high machinability of the AA7075 alloy, hole quality may vary according to tool geometry and drilling parameters. In this study, the effects of different feed rate levels and cutting speeds on the surface roughness (Ra) and thrust (Fz) were investigated. Drilling experiments were conducted with drills of three different quality and geometry. The effects of drilling variables on the surface roughness and the thrust force according to “the smaller-the better” approach of the gray relation analysis (GRA) method have been investigated. Consequently, the highest and lowest gray relations degrees obtained were 0.828 and 0.338, respectively. Numerical analyzes for thrust force were performed with the ThirdWave AdvantEdge simulation software based on the finite element method. We also outlined that there exists an average difference of 4.9 % between the experimental and simulation thrust force values, and we proved the applicability of the finite element model.
ISSN:1738-494X
1976-3824
DOI:10.1007/s12206-019-0918-5