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Fatigue Life

Home » Topics » Design » Fatigue Life
  • High cycle fatigue test rig
    June 27, 2022
    By Johannes Lövenich

    Design and Simulation of a Back-to-Back Test Rig for Ultra High Cycle Fatigue Testing of Gears Under Fully Reversed Load

    Aircraft engines can be made more efficient by integrating planetary gears. In such an application, the planetary gears experience very high load cycles under fully reversed bending loads. Pulsator test rigs, which nowadays offer the possibility to perform UHCF investigations, can only be used for purely pulsating loading of gears. Therefore, for the investigation of the UHCF tooth root load carrying capacity under fully reversed bending load, a back-to-back test rig is required. Back-to-back test rigs usually have speeds of n = 3,000 rpm, which makes investigations in the UHCF range take a very long time. Therefore, a high-speed back-to-back test rig was developed.

  • May 1, 2018

    Prediction of Dynamic Factors for Helical Gears in a High-Speed Multibody Gearbox System

    Accurate prediction of gear dynamic factors (also known as Kv factors) is necessary to be able to predict the fatigue life of gears. Standards-based calculations of gear dynamic factors have some limitations. In this paper we use a multibody dynamic model, with all 6 degrees of freedom (DOF) of a high-speed gearbox to calculate gear dynamic factors. The findings from this paper will help engineers to understand numerous factors that influence the prediction of dynamic factors and will help them to design more reliable gears.
  • May 1, 2014

    Industry News

    The complete Industry News section from the May 2014 issue of Gear Technology.
Read More
  • August 1, 2009

    Effects of Axle Deflection and Tooth Flank Modification on Hypoid Gear Stress Distribution and Contact Fatigue Life

  • January 1, 1993

    Our Readers Discuss Gear Rattle, Gear Books, and Gear Tech

  • January 1, 1990

    Surface Fatigue Life on CBN and Vitreous Ground Carburized and Hardened AISA 9310 Spur Gears

  • January 1, 1986

    The Process of Gear Shaving

  • August 1, 1984

    Maximum Surface Temperature of the Thermoplastic Gear in a Non-Lubricated Plastic-Steel Gear Pair

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Blog Posts

  • February 22, 2021
    By Matthew Jaster

    Fatigue Strength and Service Calculation of Gears

  • October 23, 2018
    By Charles D. Schultz

    Appropriate Improvements

  • December 14, 2017
    By Charles D. Schultz

    Engineering Safety (Part Two)

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Authors

  • Charles schultz
    Charles D. Schultz
  • Matthew jaster
    Matthew Jaster
  • Jens brimmers
    Jens Brimmers
  • Christian brecher
    Prof. D... Christian Brecher
  • Johannes lövenich
    Johannes Lövenich
  • Trippe, moritz
    Moritz Trippe
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