Simulation of the drilling process in GFRP composites using system dynamics and validation by ANN and RSM

This paper intends to present the System Dynamics (SD) as a novel method to simulate the thrust force developed during drilling of GFRP composites. Good quality holes are extremely fundamental so as to accomplish equally good joints amid creation of components prepared from composite for better execution.
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Simulation of the drilling process in GFRP composites using system dynamics and validation by ANN and RSMInternational Journal of Mechanical Engineering and Technology (IJMET)Volume 10, Issue 03, March 2019, pp. 585-593. Article ID: IJMET_10_03_060Available online at http://www.iaeme.com/ijmet/issues.asp?JType=IJMET&VType=10&IType=3ISSN Print: 0976-6340 and ISSN Online: 0976-6359© IAEME Publication Scopus Indexed SIMULATION OF THE DRILLING PROCESS IN GFRP COMPOSITES USING SYSTEM DYNAMICS AND VALIDATION BY ANN AND RSM Murthy B. R. N and Vijay G. S*Department of Mechanical and Manufacturing Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, Karnataka, India Corresponding author * ABSTRACT This paper intends to present the System Dynamics (SD) as a novel method to simulate the thrust force developed during drilling of GFRP composites. Good quality holes are extremely fundamental so as to accomplish equally good joints amid creation of components prepared from composite for better execution. Since the nature of a drilled hole is subject to material properties and machining conditions, it is important to think about the impacts of these factors on the nature of hole obtained. In the present work, the machining parameters thickness of the material, drill point angle, drill size, drill speed and feed rate are selected to evaluate their effect on the quality of the hole. Past works uncover the fact that the damage caused to the drilled hole is primarily due to the thrust force. Consequently it is fundamental to limit the thrust force so as to accomplish better quality of the drilled hole. The SD simulation model was implemented through a causal loop diagram. A mathematical equation used in the simulation was developed utilizing the Design of Experiments (DOE) technique. VENSIM programming was utilized to create and run the SD model. The SD simulation results were compared with Artificial Neural Networks (ANN) results, Response Surface Methodoly (RSM) results and the experimental results. A decent agreement was seen between SD, ANN and RSM results. Key words: System dynamics, GFRP drilling, Thrust force, Artificial Neural Network. Cite this Article Murthy B. R. N and Vijay G. S, Simulation of the Drilling Process in Gfrp Composites Using System Dynamics And Validation By Ann And Rsm, International Journal of Mechanical Engineering and Technology, 10(3), 2019, pp. 585-593. http://www.iaeme.com/IJMET/issues.asp?JType=IJMET&VType=10&IType=3 http://www.iaeme.com/IJMET/index.asp 585 editor@iaeme.com Simulation of the Drilling Process in Gfrp Composites Using System Dynamics and Validation by Ann and Rsm1. INTRODUCTIONIn the fields like aerospace, transport, biomedical, sport goods, etc, we can find the wideusage of various types of fiber reinforced plastics due to their excellent structural andfunctional properties, easy of manufacturing, durability and low cost [1]. The drilling processin composites involves various parameters such as material properties, drill material, drillgeometry and machining conditions [2]. The execution of these items is chiefly subject tosurface quality and dimensional precision of the hole produced. As distinguished by numerous scientists, the nature of the hole drilled is primarilyimpacted by the thrust force produced during machining. This thrust force is mainly affectedby variables, such as drill geometry, drilling speed, feed rate, and so on [3]. Subsequently,numerous researchers have attempted to limit the thrust force, through differentmethodologies, for example, changing the drill geometry, optimizing parameters, developingsimulations, etc. Scientists have utilized various distinctive methodologies, while recreating boring, so asto most likely portray precisely the intricacy just as to compute push powers, torques,temperatures, instrument wear and so on. Three primary bearings have been embracedthroughout the years. 1. The systematic numerical methodology, where the drilling device is scientifically described through complicated equations in 3D space and utilized for thorough geometrical calculations of the drilling procedure. In most of the research endeavours, 2D anticipated geometry is utilized rather, so as to minimise the necessary calculations. [3-6]. 2. The experimental one, in which extensive amount of experiments were done and the outcomes are put away in databases so that various parameters can be utilised for experimentally derived equations [7-11]. 3. The numerical approach, where tools like finite element analysis is used, based on the Lagrangian and Eulerian methods [12-18]. By the literature survey, it is evident that huge contribution has already been given bymany researchers for the advancement of different simulation techniques. In any case, in thisexploration paper we are utilizing System Dynamics (SD) as a simulation tool to build up asimulation for the thrust force generated while drilling the GFRP composite material.2. EXPERIMENTAL DETAILS:2.1 Test specimen: For the present research work, GFRP composite sample specimen wasprepared by hand layup process. As a reinforcement material E glass chopped strands ofdensity 2590 kg/m3 and modulus of elasticity of 72.5 GPa is utilised. General purpose resin[GP] is the matrix material and the fiber reinforced volume fraction is 44%. Methyl ethylketone peroxide is the harder used. 2.2 Drilling process: To conduct the drilling experiments, 3-hub TRIAC CNC verticalmachining centre is used. Kistler dynamomet ...