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A new appraisal of the thermomechanical behaviour of a hybrid composite brake disc in a formula vehicle

FORCE MOTORS, Pune , India.-Pradeep C
Sri Krishna College of Engg and Tech-Soundararajan R, Sathish Kumar K, Shanthosh G
  • Technical Paper
  • 2019-28-2572
To be published on 2019-11-21 by SAE International in United States
A new appraisal of the thermomechanical behaviour of a hybrid composite brake disc in a formula vehicle Research Objective This paper presents a hybrid composite brake disc with reduced Un Sprung Weight clearing thermal and structural analysis in a formula vehicle.Main purpose of this study is to analyse thermomechanical behaviour of composite brake disc for a formula vehicle under severe braking conditions. Methodology In the disk brake system, the disc is a major part of a device used for slowing or stopping the rotation of a wheel. Repetitive braking of the vehicle leads to heat generation during each braking condition. Based on the practical understanding the brake disc was remodelled with unique slotting patterns and grooves, using the selected aluminium alloy of (AA8081) with reinforcement particle of Silicon carbide (SiC) and Graphite (Gr) as a hybrid composite material for this proposed work. In First Phase of this Project work, By varying slotting pattern and groove angles the transient thermal and structural analysis using ANSYS workbench ,the hybrid composite disc plate of disk brake is done.The…
 

Tensile and Fatigue behavior of shallow cryogenically treated En19 alloy steel

BSACIST-Loganathan Sekar, Tamil Arasan
SRM Institute of Science and Technology-Rajendran Raj
  • Technical Paper
  • 2019-28-0100
To be published on 2019-10-11 by SAE International in United States
Wear, tensile and axial fatigue tests were conducted on shallow cryogenically treated En19 medium carbon alloy steel to investigate its mechanical behavior. The test samples are conventionally heat treated then oil quenched at 34 ˚C. Followed by the samples were kept under shallow cryogenic treatment to -80˚C for 12 hours using liquid nitrogen. Then the samples were tempered in a muffle furnace to relieve the induced residual stresses. Wear, Tensile and axial fatigue test was carried out on both treated and non-treated samples to measure its wear resistance, tensile strength and fatigue behavior respectively. Microscopic examination also done using scanning electron microscope to compare the effect of shallow cryogenic treatment on its microstructure. The results exposed that there is a reduction in the tensile strength and fatigue life of shallow cryogenically treated samples over base metal and improved wear resistance.
 

Improvement of Mechanical Properties, and Optimization of Process Parameters of AISI 1050 Spheriodized Annealed steel by Ranking Algorithm

SRM Institute of Science and Technology-Durai Kumaran, Sundar Singh Sivam Sundarlingam Paramasivam, Krishnaswamy Saravanan, Raj Rajendran
Tishk International University-Ganesh Babu Loganathan
  • Technical Paper
  • 2019-28-0143
To be published on 2019-10-11 by SAE International in United States
AISI 1050 is used in the production of landing gear, actuators and other aerospace components but their application is limited due to machinability of the material. In any metal cutting operation the features of tools, input work materials, machine parameter settings will influence the process efficiency and output quality characteristics. A significant improvement in process efficiency may be obtained by process parameter optimization that identifies and determines the regions of critical process control factors leading to desired outputs or responses with acceptable variations ensuring a lower cost of manufacturing. This experimental study elucidates the problems and machinability issues like failure of tools and accuracy are found while machining and less output in machining. In the present study of spherodizing heat treatment of AISI 1050 was investigated during the turning operation in CNC lathe, under the consideration of several turning process parameters. The microstructures of the as-received, and heated specimens were investigated by Optical Microscopy (OM). A correlation between various process parameters on the desired response namely surface finish, roundness Material Removal Rate (MRR), power consumption…
 

Machinability and parametric optimization of Inconel 600 using Taguchi-Desirability analysis under dry environment

Vellore Institute of Technology-Venkatesan Kannan, Devendiran Sundararajan, Abhishek Chahal, Devesh Raj
  • Technical Paper
  • 2019-28-0068
To be published on 2019-10-11 by SAE International in United States
Inconel 600 is a face-centered cubic structure and nickel-chromium alloy. Alloy 600 has good resistance to oxidation, corrosion resistant, excellent mechanical properties and good creep rupture strength at higher temperature. Alloy 600 is used in chemical and food processing, heat treating, phenol condensers, soap manufacture, vegetable, and fatty acid vessels. In this context, the present paper investigates the machinability characteristics of Alloy 600 under dry environment. Also, the parametric effect of cutting speed, feed rate and cutting depth on the force, surface roughness and tool wear are carried out using 3-Dimensional surface and 1-Dimensional plots. The optimal parameters are determined systematically based on Taguchi-desirability analysis with turned with TiAlN coated carbide insert. From the graphical analysis of collected data, the low rate of feed and moderate cutting for roughness and cutting force and average feed rate for tool wear with low cutting depth. Probability test at 95% confidence reveals the residual of machining data falls reasonably on a straight line and can be taken for factor optimization. Variance test reveals that the cutting depth (68.34%)…
 
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NUT, SELF-LOCKING, PLATE, TWO LUG, LOW HEIGHT, UNS S66286, CLASS: 125 KSI/800 °F

E-25 General Standards for Aerospace and Propulsion Systems
  • Aerospace Standard
  • AS3478D
  • Current
Published 2019-08-15 by SAE International in United States
No Abstract Available.
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NUT, FLOATING, SELF-LOCKING, ATTACHED RETENTION ELEMENT, 450 °F, 125 KSI FTU, UNS S66286

E-25 General Standards for Aerospace and Propulsion Systems
  • Aerospace Standard
  • AS3601A
  • Current
Published 2019-08-15 by SAE International in United States
No Abstract Available.
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WASHER, KEY - 180 DEG, LOCKING, CRES, UNS S32100

E-25 General Standards for Aerospace and Propulsion Systems
  • Aerospace Standard
  • AS9276B
  • Current
Published 2019-08-15 by SAE International in United States
No Abstract Available.
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NUT ELEMENT, ATTACHED RETENTION ELEMENT, 450 °F, 125 KSI FTU, UNS S66286

E-25 General Standards for Aerospace and Propulsion Systems
  • Aerospace Standard
  • AS3602A
  • Current
Published 2019-08-15 by SAE International in United States
No Abstract Available.
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WASHER, KEY - 90 DEG, LOCKING, CRES, UNS S32100

E-25 General Standards for Aerospace and Propulsion Systems
  • Aerospace Standard
  • AS9581B
  • Current
Published 2019-08-15 by SAE International in United States
No Abstract Available.
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Brass Tubing, Seamless, 66.5Cu - 33Zn - 0.45Pb, Annealed

AMS D Nonferrous Alloys Committee
  • Aerospace Material Specification
  • AMS4554C
  • Current
Published 2019-08-06 by SAE International in United States

This specification covers one grade of brass in the form of seamless tubing.