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Technical Paper

Experimental Investigation of machining characteristics of Al 6063 aluminium alloy using Response Surface Methodology

2021-04-06
2021-01-0283
In modern automotive industries, technology is advancing. Industries needs lower-cost operations with less production time and better surface properties to maintain competitiveness. For that attempts have been made by researchers to predict process parameters for achieving optimum surface quality. Aluminium alloys (Al 6063) are widely used in the industrial application. It has applications in the field of automotive structures owing to its excellent strength, aesthetics, and availability. With its widespread use it is important to understand its machining properties which is the motive of this research work. This research work reports the significance of influence of speed (s), feed (f), depth of cut (d) and nose radius (r) of the cutting tool on the Material removal rate (MRR) and Surface roughness (SR) of the Al 6063 aluminium. Cemented carbide tool inserts were used to machine the Al 6063.
Technical Paper

Maximized energy absorption and an investigation on practical limitations for the axial cutting and hybrid cutting/clamping deformation modes

2021-04-06
2021-01-0285
The axial cutting deformation mode is a novel alternative to progressive folding, the current state-of-the-art, which exhibits more favorable mechanical performance. By splitting the extrusion into multiple evenly spaced and near-identical petals a highly consistent force response can be achieved. Maximizing the energy absorbing capacity of a sacrificial energy absorber is a fundamental design challenge in the field of crashworthiness. Generating hybrid deformation modes by simultaneously combining multiple deformation mechanisms into a single safety system is a promising technique to achieve high capacity energy dissipation. However, these systems tend to be susceptible to transitioning deformation modes (e.g. from progressive folding to global bending) since the sacrificial material is often loaded at or near its capacity.
Standard

Identification Marking Methods

2021-01-21
CURRENT
AS478R
This standard provides the following: a Definition of terms pertaining to marking. b Symbols for marking location. c Requirements and restrictions for permanent markings. d Types of marking methods. e Rules for designating marking methods. f Table listing marking methods.
Standard

PERFORMANCE SPECIFICATION FOR AUTOMOTIVE WIRE HARNESS RETAINER CLIPS

2021-01-20
CURRENT
USCAR44-1
This specification describes a method and acceptance criteria for testing automotive wire harness retainer clips. Retainer clips are plastic parts that hold a wire harness or electrical connector in a specific position. Typical plastic retainers work by having a set of “branches” that can be inserted into a hole sized to be easy to install but provide acceptable retention. This specification tests retainer clips for mechanical retention when exposed to the mechanical and environmental stresses typically found in automotive applications over a 15-year service life. This specification has several test options to allow the test to match to the expected service conditions. The variability of applications typically arises from different ambient temperatures near the clip, different proximity to automotive fluids, different exposure to standing water or water spray, and different thicknesses of the holes that the clip is inserted into.
Standard

Overlap Shear Test for Automotive Type Sealant for Stationary Glass Bonding

2021-01-07
CURRENT
J1529_202101
This SAE Recommended Practice defines a procedure for the construction and testing of glass to metal lap shears for determining shear strength of sealant adhesives for automotive stationary glass bonding. This procedure can also be used for fiber reinforced plastic (FRP) when used in place of metal.
Standard

Peel Strength of Soft Trim Adhesives

2021-01-07
CURRENT
J1679_202101
This SAE Recommended Practice shall be used to determine the peel strength achieved by an adhesive when used to bond various decorative, flexible substrates such as cloth supported vinyl or carpet, to rigid (steel), semi-rigid (SMC plastic), or other similar substrates.
Standard

Coach Joint Fracture Test

2021-01-07
CURRENT
J1863_202101
This SAE Recommended Practice defines a procedure for determining the cleavage strength of an adhesive used for bonding automotive oily metal substrates.
Technical Paper

Prediction and Evaluation of Heterogeneous Traffic Flow Based on Spatiotemporal Slices in Cooperative Vehicle Infrastructure System

2020-12-30
2020-01-5238
With the development of vehicle-road coordination technology, driving modes of the vehicle are in the process of development from manual driving, assisted driving, autonomous driving, mixed driving between people and vehicles to advanced unmanned driving. Heterogeneous traffic flows are essential for the development of vehicle-road coordination systems. However, in real life, it is necessary to intelligently monitor heterogeneous traffic flow because they involve many types of vehicles, complex scenarios, complex hidden factors in traffic conditions, and different operating characteristics of vehicles at different times and places.
Standard

Studs, Corrosion and Heat Resistant Steel, UNS S66286 Tensile Strength 130 ksi 1800 °F Solution Heat Treated, Aged Before Roll Threading Procurement Specification

2020-09-25
WIP
AS7482C
This specification covers studs made from a corrosion and heat resistant, age hardenable iron base alloy of the type identified under the Unified Numbering System as UNS S66286. The following specification designations and their properties are covered: AS7482 130 ksi minimum ultimate tensile strength at room temperature 70 ksi stress-rupture strength at 1200 °F; AS 7482-1 130 ksi minimum ultimate tensile strength at room temperature 78 ksi minimum ultimate shear strength at room temperature; AS7482-2 130 ksi minimum ultimate tensile strength at room temperature.
Technical Paper

Numerical Investigations on Thermo-Structural Behavior of Various Cut Patterns for Ventilation on Automobile Brake Discs

2020-09-25
2020-28-0477
Overheating of the brake disc is a major concern in the brake performance. Overheating is the main cause of a reduction in braking efficiency, especially if a vehicle is fully loaded. The heat dissipation rate for Solid rotors is very low. In order to increase the heat dissipation rate, the disc must be used with ventilation provided on it. Further in ventilated disc rotors, the ribs in between the rotors provide cooling. The ribs allow the flow of heat and pull out the air in between the rotors for efficient cooling. In this research, four different brake disc namely, Solid Disc (SL), Cross-drilled disc (CD), Cross-slot disc (CS) and Hybrid disc (CD-CS-SG) which is a combination of Cross drilled and slot with side groove have been analyzed at various brake conditions in the form of heat generation and thermal stresses.
Technical Paper

Optimization of Wire Cut EDM Process Parameters of Al/SiO2 Composites Using Taguchi Method

2020-09-25
2020-28-0426
This paper focused on optimizing wire cut EDM processing parameters based on the taguchi method to minimize surface roughness. The stir casting technique was used to produce 10 wt% SiO2 aluminum matrix composites as reinforcement. Three processing parameters such as time pulse on time, pulse off time, and current were considered. The orthogonal L9 section of Taguchi was used as the model of the experiment. Analysis of variance (ANOVA) was performed to detect the important parameter affecting surface roughness. The confirmation test was performed to validate the test result. The results revealed that the pulse off time (44.69%) is the most dominant factor affecting the quality of surface roughness followed by current (14%) and pulse on time (4.58%). It can be concluded that the surface roughness can be minimized with this method.
Technical Paper

The Effect of Print Orientation and Infill Density for 3D Printing on Mechanical and Tribological Properties

2020-09-25
2020-28-0411
The 3D Printing (3DP) technology due to its greatest strength, resistance to wear and corrosion to oxidizing agents and has good temperature resistance with durable one. The present article describes the effect of print orientation and infill density of 3DP route on mechanical and tribological properties of PETG filament. The 3DP parameters like layer thickness, slicing, speed, feed are kept as constant and by varying the print orientation (X, Y, Z) with infill density (50%, 75%, 100%) was printed to check the effect of it on mechanical and tribological properties like hardness, impact strength, ultimate tensile strength, flexural strength, wear rate and coefficient of friction. The results shows that all the tested mechanical and tribological properties increase by around 30-60% when the orientation is in the X direction at infill density of 100%.
Technical Paper

Optimization and Experimental Analysis of AZ91E Hybrid Nanocomposite by Drilling Operation

2020-09-25
2020-28-0509
The usage of AZ91E series magnesium alloy material increases in the field of automobile, aerospace and structural applications because of its enhanced mechanical properties, light weight and good machinability characteristics. The present investigation is to optimize the drilling process parameters of magnesium alloy (AZ91E) hybrid nano composite consisting of chopped basalt fiber (9wt%) and SiCp (7.5wt%) fabricated by vacuum stirring technique. AZ91E hybrid nano composite is drilled by M-Tab vertical machining centre equipped with CNC under dry state (without coolant). The dry state drilling operation was performed by HSS tool with varied input parameters like drill diameter (6mm, 8mm, 10mm and 12mm), spindle speed (200rpm, 300rpm 400rpm 500rpm), feed rate (5mm/min, 10mm/min, 15 mm/min, 20 mm/min) with constant depth of cut (15mm).
Standard

Bolts and Screws, Nickel Alloy, UNS N07718, Tensile Strength 185 ksi, Stress Rupture Rated, Procurement Specification

2020-08-24
WIP
AS7467C
This procurement specification covers bolts and screws made from a corrosion and heat resistant, age hardenable nickel base alloy of the type identified under the Unified Numbering System as UNS N07718. The following specification designations and their properties are covered: AS7467 - 185 ksi minimum ultimate tensile strength at room temperature; 145 ksi minimum ultimate tensile strength at 1200 °F; 100 ksi stress rupture strength at 1200 °F AS7467-1 - 185 ksi minimum ultimate tensile strength at room temperature; 111 ksi minimum ultimate shear strength at room temperature
Standard

Bolts and Screws, Steel, Low Alloy Heat Treated, Roll Threaded

2020-08-24
WIP
AS7452C
This procurement specification covers aircraft quality bolts and screws made from a low alloy steel of the type identified under the Unified Numbering System as UNS G87400, and of a series of room temperature tensile strengths ranging from 125 000 to 185 000 psi.
Standard

Bolts and Screws, Nickel Alloy, UNS N07718, Tensile Strength 185 ksi, Fatigue Rated, Procurement Specification

2020-08-24
WIP
AS7466F

This procurement specification covers aircraft-quality bolts and screws made of corrosion and heat resistant, age hardenable nickel base alloy of the type identified under the Unified Numbering System as UNS N07718. The following specification designations and their properties are covered:

AS7466

  • 185 ksi minimum ultimate tensile strength at room temperature.
  • 155 ksi minimum ultimate tensile strength at 800 °F.>
  • 105 ksi tension to 10.5 ksi tension fatigue at room temperature.
  • AS7466-1

  • 185 ksi minimum ultimate tensile strength at room temperature.
  • 111 ksi minimum ultimate shear strength at room temperature.
  • Standard

    Bolts, Screws and Studs, Nickel Alloy, UNS N07718 Work-Strengthened, Tensile Strength 220 ksi Procurement Specification

    2020-08-03
    CURRENT
    AS5270A
    This procurement specification covers bolts, screws, and studs made from a work-strengthened corrosion and heat resistant, age hardenable nickel base alloy of the type identified under the Unified Numbering System as UNS N07718. The following properties are covered: 220 ksi minimum ultimate tensile strength at room temperature 180 ksi minimum ultimate tensile strength at 900 °F 114 ksi tension to 11.4 ksi tension fatigue at room temperature
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