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SIMULATION OF SOFTENING AND RUPTURE IN MULTILAYERED FUEL TANK MATERIAL

General Motors Technical Center India-Vijaya Kumar R L, Biswajit Tripathy, Jayaraj Radhakrishnan
  • Technical Paper
  • 2019-28-2557
To be published on 2019-11-21 by SAE International in United States
Research and/or Engineering Questions/Objective Plastic automotive fuel tanks made up of blow molded, multi-layered, high-density polyethylene (HDPE) material can take complex shapes with varying thickness. Accidental drop of fuel tank from a height during handling can lead to development of cracks. Damage can also occur due to an impact during a crash. This can be catastrophic due to flammability of the fuel. The objective of this work is to characterize and develop a failure model for the fuel tank material to simulate damage and enhance predictive capability of CAE for chassis and safety load cases. Methodology Different aspects were considered to develop a characterization and modelling strategy for the HDPE fuel tank. Material properties can be influenced by factors such as, service temperature, rate of deformation, state of stress etc. Hence, samples cut-out from different regions of the fuel tank were subjected to a variety of tests such as tensile test at different strain rates viz. 0.01/s, 0.1/s, 1/s, 10/s and 100/s, compression, shear, flexure and instrumented dart impact tests at different temperatures, -40°C, 23°C…
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Steel, Corrosion and Heat-Resistant, Welding Wire 15Cr - 25.5Ni - 1.3Mo - 2.2Ti - 0.006B - 0.30V

AMS F Corrosion Heat Resistant Alloys Committee
  • Aerospace Material Specification
  • AMS5804H
  • Current
Published 2019-11-12 by SAE International in United States
This specification covers a corrosion and heat-resistant steel in the form of welding wire.
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Aluminum Alloy, Extrusion 3.7Cu - 1.15Li - 0.5Zn - 0.45Ag - 0.4Mg - 0.3Mn - 0.1Zr (2055-T84) Solution Heat Treated, Stress Relieved by Stretching 2% to 5% and Aged

AMS D Nonferrous Alloys Committee
  • Aerospace Material Specification
  • AMS4257
  • Current
Published 2019-11-12 by SAE International in United States
This specification covers an aluminum alloy in the form of extruded bars, rods, and profiles.
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Steel, Corrosion and Heat Resistant, Welding Wire 9.0Mn - 20Cr - 6.2Ni - 0.20N

AMS F Corrosion Heat Resistant Alloys Committee
  • Aerospace Material Specification
  • AMS5818C
  • Current
Published 2019-11-12 by SAE International in United States
This specification covers a corrosion and heat resistant steel in the form of welding wire.
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Nickel-Iron Alloy, Corrosion and Heat-Resistant, Welding Wire 12.5Cr - 42.5Ni - 6.0Mo - 2.7Ti - 0.015B - 35Fe

AMS F Corrosion Heat Resistant Alloys Committee
  • Aerospace Material Specification
  • AMS5830C
  • Current
Published 2019-11-12 by SAE International in United States
This specification covers a corrosion and heat-resistant nickel-iron alloy in the form of welding wire.
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Coating, Titanium Nitride Physical Vapor Deposition

AMS B Finishes Processes and Fluids Committee
  • Aerospace Material Specification
  • AMS2444A
  • Current
Published 2019-11-04 by SAE International in United States
This specification covers the requirements for the application and properties of a titanium nitride coating on metal parts applied by physical vapor deposition (PVD).
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Analogy of Thermal Properties of Polyamide 6 Reinforced with Glass Fiber and Glass Beads through FDM Process

Sri Krishna College of Engg and Tech.-Soundararajan Ranganathan, Hari Nishok Rangasamy Suguna Thangaraj, Aravind Kumar Vasudevan, Dharshan Karthick Shanmugan
Published 2019-10-11 by SAE International in United States
The essential target of this examination is to compare the morphological and thermal properties of two different polyamide composite blends with inventive thermal properties. The polyamide-6 (PA6) reinforced with 10, 20 and 30 wt. % glass fiber (GF) and PA6 reinforced with 10, 20 and 30 wt. % glass beads (GB) are the two different polyamide composite blends extruded in form of wire by twin screw extrusion process. The experimental study illustrates to print the specimens by means of Fusion Deposition Modeling (FDM) based Three-Dimensional (3D) printer. The responses like morphology, Thermal Conductivity (TC) and Heat Distortion Temperature (HDT) of composites were observed. From the scanning electron microscope (SEM) analysis equal distribution of higher 30wt% GF and GB in the PA6 matrix was observed. The results compare the increasing thermal properties of the 3D printed specimen like TC and HDT with the enhancement of beads content during the investigation. The GB are crystalline material which improves the thermal properties of the PA6 matrix and the GF are dimensionally stable material that can provide high modulus…
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Development and Influence of Setting Process Variables in Single Point Incremental Sheet Metal Forming of AA 8011 Using Complex Proportional Assessment and ANOVA

SRM Institute of Science and Technology-Sundar Singh Sivam Sundarlingam Paramasivam, Durai Kumaran, Krishnaswamy Saravanan, Raj Rajendran, Harish Sriram
Tishk International University-Ganesh Babu Loganathan
Published 2019-10-11 by SAE International in United States
Single point Incremental forming (SPIF) is a metal forming process that has achieved impeccable quality since the early 1990s. ISF is a very limited twisting process in which an improved device that must be used after a particular direction travels on a metal sheet to form the desired shape. Process parameters such as axial feed (mm), feed (mm / min), tool diameter (mm) and depth (mm) at the interface between samples during SPIF greatly affect the quality of the cone. Maximum thinning (mm), cone height (mm), wall angle (mm), formation time (minutes), etc. The purpose of this study was to study these parameters by improving the cone mass formed by VMC. For a detailed study of these parameters, experiments were performed using the orthogonal array L9. Output parameters such as mechanical quality effects were analysed using COPRAS (Complex Proportional Assessment of alternatives) and ANOVA.
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Die Design Parameter Optimization for Steering Intermediate Tube Using Taguchi Method

Rane NSK Steering Systems Pvt Ltd.-Mohanraj Ramamoorthi, Chaitanya Gandhi, Bharathkumar Krishnadoss, Arunkumar Nagarajan
Published 2019-10-11 by SAE International in United States
The increasing demand for lower cost and higher reliability of product of Indian OEM’s, one of the approach is using cheaper raw material considering design for X. In current steering intermediate tube, the development of replacing the imported material of STKM11A by local material of same grade has been done. The microstructure comparison shows there is variation in grain size and Mechanical properties of local and imported material and thus affects the formability of material. Increasing in mechanical properties such as hardness and tensile strength of material leads to challenge in actual forming as it affects the die life and its performance. In this paper, Non-linear explicit Axial cold forming process of Intermediate tube has been simulated through Finite Element Analysis Tool for both the local and imported material with optimization of die parameters. Dimensional requirement was one of the important parameter to correlate between the Design and Forming simulation. The parameter identified by past experience were Rough die opening angle, Mandrel forming angle, co-efficient of friction, Lobe width and Angle. Through Taguchi method, effect…
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Manufacturing Process for Aluminum Alloys

  • Magazine Article
  • TBMG-35274
Published 2019-10-01 by Tech Briefs Media Group in United States

An advanced manufacturing process was developed to produce nano-structured rods and tubes directly from high-performance aluminum alloy powder in a single step. Using a Solid Phase Processing approach, researchers eliminated several steps that are required during conventional extrusion processing of aluminum alloy powders and achieved a significant increase in product ductility (how far a material can stretch before it breaks).