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Fatigue Evaluation of Flow Drill Screw Joints Using the Equilibrium-Based Structural Stress Method

Engineering Mechanics Corp. of Columbus-Jeong Hong, Gery Wilkowski
  • Technical Paper
  • 2020-01-0189
To be published on 2020-04-14 by SAE International in United States
According to the increasing demands for light-weight design in the automotive industry, the use of thinner and lighter materials such as aluminum alloys for automotive parts has led to significant weight reduction. The joining of these materials has required development of new technologies in joining/fastening rather than welding. Flow drill screwing is one of the latest technologies created to fasten sheet metal panels.This paper discusses results of an evaluation of fatigue characteristics of flow drill screw (FDS) joints based on experimental data and observations from the literature. It was observed that the important fatigue-related geometric parameters of FDS joints were the gap between sheets and the extruded (or bulged) zone during screwing. Major failure modes were observed such as sheet failures where cracks grow from the inner surface of the sheet and around the extruded zone.In this paper, the fatigue evaluation procedure for FDS joints using the mesh-insensitive equilibrium-based structural stress (ESS) method was used. The ESS-based simplified modeling procedure was used for the fatigue-evaluation procedure for FDS joints. The effectiveness and applicability of the…
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Advancements in Thermoplastic Optical Materials for Automotive Lighting Systems

Arkema Inc.-Altuglas International-Brian Cromer, Laura Thoma, Noah Macy, Charles Rissel
  • Technical Paper
  • 2020-01-0634
To be published on 2020-04-14 by SAE International in United States
Described are strategies to maximize the performance and efficiency of long path length acrylic optical elements through material selection and manufacturing optimization. Recent LED lamp designs include functional optical elements such as light pipes and dispersion optics that channel LED light through long optical path lengths (LOPL), 5-80 cm in length. Typically, these elements are manufactured from thermoplastic optical materials such as PMMA or PC through injection molding. However, conventional thermoplastic optical materials are not suitable for LOPL application due to insufficient luminous transmission and high absorption coefficients, resulting in inadequate lamp function and poor efficiency. Furthermore, the effects of molding conditions on LOPL performance are poorly understood. Recent advancements in acrylic technology produced optimized materials for LOPL signature lighting optics: Plexiglas® HT121-LPL® and V825T-LPL® resins. Compared to conventional acrylic resins, these optimized resins increase luminous transmission 95%-101% in a 60 cm light pipe and also improve spectral transmission uniformity. Additionally, optimization of injection molding parameters including screw speed, dwell time, injection speed, and barrel temperature further increase luminous transmission 3.0%-8.2%.
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SHIELD FOR USE WITH AS90362 EXTERNAL POWER RECEPTACLES

AE-8C1 Connectors Committee
  • Aerospace Standard
  • AS17845A
  • Current
Published 2020-03-02 by SAE International in United States
No Abstract Available.
This content contains downloadable datasets
Annotation ability available
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Nuts, Self-Locking, Steel, Corrosion and Heat Resistant High Strength, All Metal 1200 °F Use, UNJ Thread Form

E-25 General Standards for Aerospace and Propulsion Systems
  • Aerospace Standard
  • AS7251C
  • Current
Published 2020-02-03 by SAE International in United States
This document covers all metal, self-locking wrenching nuts, plate nuts, shank nuts, and gang channel nuts made from a corrosion and heat resistant steel of the type identified under the Unified Numbering System as UNS S66286 and of 160 ksi tensile strength at room temperature, with maximum test temperature of parts at 1200 °F.
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ACCESSORY, F ADAPTER, ROTATABLE, CONNECTOR, ELECTRICAL, CIRCULAR, HIGH DENSITY, QUICK DISCONNECT, ENVIRONMENT RESISTING, TYPE 1, (SERIES 1 OR 2)

AE-8C1 Connectors Committee
  • Aerospace Standard
  • AS81511/13
  • Current
Published 2019-12-26 by SAE International in United States
No Abstract Available.
This content contains downloadable datasets
Annotation ability available
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ACCESSORY, ADAPTER, STRAIGHT, CONNECTOR, ELECTRICAL, CIRCULAR, HIGH DENSITY, QUICK DISCONNECT, ENVIRONMENT RESISTING

AE-8C1 Connectors Committee
  • Aerospace Standard
  • AS81511/14
  • Current
Published 2019-12-26 by SAE International in United States
No Abstract Available.
This content contains downloadable datasets
Annotation ability available
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CONNECTOR ACCESSORIES, ELECTRICAL, BACKSHELL, ENVIRONMENTAL, CABLE SEALING, STRAIGHT, GROUNDING (WITHOUT STRAIN RELIEF), CATEGORY 1C (FOR AS50151 SOLDER TYPE, V THREAD OF AS310XX CLASSES A, B, C, OR K CONNECTORS, AS95234 CONNECTORS)

AE-8C1 Connectors Committee
  • Aerospace Standard
  • AS85049/1B
  • Current
Published 2019-12-19 by SAE International in United States
No Abstract Available.
This content contains downloadable datasets
Annotation ability available
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CONNECTOR ACCESSORIES, ELECTRICAL, BACKSHELL, ENVIRONMENTAL, CABLE SEALING, STRAIGHT, CATEGORY 1C (FOR AS50151 SOLDER TYPE, V THREAD OF AS310XX CLASSES A, B, C, OR K CONNECTORS, AS95234 CONNECTORS)

AE-8C1 Connectors Committee
  • Aerospace Standard
  • AS85049/2B
  • Current
Published 2019-12-19 by SAE International in United States
No Abstract Available.
This content contains downloadable datasets
Annotation ability available
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INSERT, SCREW THREAD, SELF-LOCKING LOCKED IN, KEY LOCKED, EXTRA HEAVY DUTY, SELF-BROACHING KEYS, UNS S66286

E-25 General Standards for Aerospace and Propulsion Systems
  • Aerospace Standard
  • AS3546B
  • Current
Published 2019-11-21 by SAE International in United States
No Abstract Available.
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Annotation ability available
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CONNECTOR, RECEPTACLE, EXTERNAL ELECTRIC POWER, AIRCRAFT, 270 VDC, 90 KW

AE-8C1 Connectors Committee
  • Aerospace Standard
  • AS81790/1
  • Current
Published 2019-11-15 by SAE International in United States
No Abstract Available.
This content contains downloadable datasets
Annotation ability available