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MITIGATION FOR EDGE CORROSION PROTECTION FOR AUTOMOTIVE BODIES

Automotive Manufacturer-Jayanthan Balasubramanian
Mahindra Engineering-Rahul Lalwani
  • Technical Paper
  • 2019-28-2561
To be published on 2019-11-21 by SAE International in United States
TITLE: MITIGATION FOR EDGE CORROSION PROTECTION FOR AUTOMOTIVE BODIES. Keyword: Edge corrosion, Edge protection, Rust on edges, Corrosion mitigation. Objective: A major challenge to automotive industry is to protect the vehicle from corrosion in varying environment with respect to different service conditions. One of the main types of corrosion that affects aesthetic look is edge corrosion on sheet metal. Mostly edge is acting as starting point of corrosion due to unprotected metal exposed to environment. A special attention to be given to exposed edges to protect from rust formation. Methodology: To mitigate corrosion in visible area, various solution proposed in manufacturing process, material usage, sealer application, BIW design. Samples were prepared as per design of experiments with respect to manufacturing process condition and subjected for testing. Results: Proposed solutions were validated in manufacturing process line and reports are discussed. Improvements observed in controlled lab testing were furnished with observations and recommendations. Limitation of this study: On high volume passenger and commercial segment, corrosion mitigations are linked with high cost impact where high-end corrosion protection like…
 

A Mathematical Approach to Determine Die Wear during Forging Process and Validation by Experimental Technique

Dr P K Ajeet Babu-Ajeet Babu P K
  • Technical Paper
  • 2019-28-2563
To be published on 2019-11-21 by SAE International in United States
The automotive industry is constantly trying to develop cost effective, high strength and lightweight components to meet the emission and safety norms while remaining competitive in the market. Forging process plays an important role to produce most of the structural components in a vehicle. Precision forging technology is used to produce components with little or no flash leading to elimination of machining process after forging. The load acting on the dies during net or near net forging is very high and leads to wear in the die. In order to have a good die it is important that die wear which is an inevitable phenomenon in a bulk metal forming processes is predicted mathematically. In this study a review on the vast number of studies done in the area of wear and various predictive models is carried out. The various models available for abrasive wear such as Archard, Felder-Montagut and IFUM model and for adhesive wear such as Holms model has been studied and implemented in commercial FE Code by developing FORTRAN subroutine and wear…
 
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Isolation and Corrosion Protection of Dissimilar Materials, Carbon Composite Structure Repair

AMS G9 Aerospace Sealing Committee
  • Aerospace Standard
  • ARP4118B
  • Current
Published 2019-07-09 by SAE International in United States
This SAE Aerospace Recommended Practice (ARP) provides methods and guidelines for isolating dissimilar repair patch materials from carbon fiber reinforced plastic (herein also referred to as carbon composite) structure during a repair operation.
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MOUNTING HARDWARE, CUSHION CLAMP, METAL FOR CABLE HARNESS TYING AND SUPPORT, TYPE V, CLASS 1

AE-8C2 Terminating Devices and Tooling Committee
  • Aerospace Standard
  • AS23190/4D
  • Current
Published 2019-07-03 by SAE International in United States
No Abstract Available.
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The Rodney Dangerfield of Automated-Driving Sensors

Autonomous Vehicle Engineering: July 2019

Bradley Berman
  • Magazine Article
  • 19AVEP07_06
Published 2019-07-01 by SAE International in United States

Radar and lidar get all the attention, but Inertial Measurement Units are the backbone of sensor fusion. Suppliers are scrambling to make IMUs more accurate-and much less expensive.

The emerging era of highly-automated driving comes courtesy of much-vaunted sensor technology-spinning lasers, penetrating radar, sonar blips. But the sensor that gets the least respect in the technology stack could be the lynchpin for the mass roll-out of self-driving vehicles: the inertial measurement unit (IMU).

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TERMINATION, SOLDER STYLE, INSULATED, HEAT-SHRINKABLE, ENVIRONMENT RESISTANT WITH MULTIPLE OPENING SEALANT, 150 °C AND 200 °C

AE-8C2 Terminating Devices and Tooling Committee
  • Aerospace Standard
  • AS83519/4
  • Current
Published 2019-06-13 by SAE International in United States
No Abstract Available.
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Etching of Fluoropolymer Insulations

AE-8A Elec Wiring and Fiber Optic Interconnect Sys Install
  • Aerospace Standard
  • ARP6167
  • Current
Published 2019-06-11 by SAE International in United States
This SAE Aerospace Recommended Practice (ARP) describes the etching of fluoropolymer electrical wire insulations to ensure that all facets of the process from the chemistry to the processing, to the storage and handling are well defined.
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Equivalent Material Properties of Multi-Layer, Lightweight, High-Performance Damping Material and Its Performance in Applications

3M Company-Taewook Yoo, Ronald Gerdes, Seungkyu Lee, Thomas Herdtle
3M Deutschland GmbH-Georg Eichhorn
Published 2019-06-05 by SAE International in United States
In this study, we investigated two aspects of a multi-layer, lightweight damping treatment. The first aspect studied was an equivalent material property estimate for a simplified finite element (FE) model. The simplified model is needed for computational efficiency, i.e. so that Tier 1 and OEM users can represent this complex, multi-layer treatment as a single, isotropic solid layer plus an aluminum constraining layer. Therefore, the use of this simplified FE model allows the multilayer treatment to be included in large body-in-white structural models. An equivalent material property was identified by first representing three unique layers (two adhesive layers plus a connecting standoff layer) by a single row of isotropic solid elements, then an optimization tool was used to determine the “best fit” for two properties including Young’s modulus and material loss factor. Equivalent properties were validated for various substrate thickness and coverage areas heights by comparison to center-driven long bar test results.Secondly, the effect of damping treatment size was studied using the previously identified equivalent material properties. This was a damper placement study to determine…
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Joining Gun Bonds Metal and Plastic in Seconds

  • Magazine Article
  • TBMG-34612
Published 2019-06-01 by Tech Briefs Media Group in United States

The connection of plastics and metals poses a challenge due to the different physical properties of the two materials. All conventional joining options, such as bonds using adhesives or rivets, have their disadvantages — adhesives need time to harden, which delays further processing, and plastics can be easily damaged during riveting. Furthermore, both adhesive bonding and riveting require additional materials that increase production costs.

 

Sealing Compound Aircraft Firewall, Silicone

AMS G9 Aerospace Sealing Committee
  • Aerospace Material Specification
  • AMS3374F
  • Current
Published 2019-05-31 by SAE International in United States
This specification covers six types of silicone sealing compounds curing to elastomeric materials.
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