Essays about: "Palmgren-Miner rule"

Found 4 essays containing the words Palmgren-Miner rule.

  1. 1. Effect of dwell (hold) time on high temperature fatigue crack growth of AM components

    University essay from KTH/Lättkonstruktioner, marina system, flyg- och rymdteknik, rörelsemekanik

    Author : Hemanth Venkatesan; [2023]
    Keywords : Dwell time; creep; fatigue; IN718; LPBF; hold time; sustained loading; Uppehållstid; krypning; utmattning; IN718; LPBF; hålltid; ihållande belastning;

    Abstract : GKN Aerospace AB, Sweden (GAS) is one of the leading companies taking up the charge in manufacturing components using Additive Manufacturing(ed) (AM) techniques in the aerospace sector. They are a hub of engineering and they are a supplier of engine and engine components to the world’s leading aero-engine manufacturers, and airframes to civil and military aircraft manufacturers. READ MORE

  3. 2. Transient and Spectral Fatigue Analysis for Random Base Excitation

    University essay from

    Author : Albin Bäckstrand; Prithviraj Madhava Acharya; [2019-09-16T10:43:03Z 2019-09-16T10:43:03Z 2019 2019]
    Keywords : Spectral fatigue analysis; transient fatigue analysis; power spectral density PSD ; transfer function; base excitation; Dirlik s empirical formula; equivalent von Mises stress EVMS ; rainflow count; Wang and Brown s method; Dang Van equivalent stress; Palmgren-Miner rule;

    Abstract : This thesis work gives an insight on how to estimate the fatigue damage using transient and spectral fatigue analysis for both uniaxial and multiaxial stress states in case of random vibration base excitation. The transient method involves a rainflow count algorithm that counts the number of cycles causing the fatigue damage, while the spectral method is based on probabilistic assumptions from which an expected value of fatigue damage can be estimated. READ MORE

  4. 3. DETERMINATION OF THE STRESSES PRESENT IN A HY-VO CHAIN SPROCKET USING MULTIBODY SIMULATION AND FINITE ELEMENT ANALYSIS

    University essay from Lunds universitet/Mekanik

    Author : Henrik Larsson; [2018]
    Keywords : Hy-Vo; chain; sprocket; simulation; ADAMS; fatigue; Technology and Engineering;

    Abstract : In this master thesis, a new way of approaching the dynamic loads on a Hy-Vo chain sprocket was investigated and analyzed. Though the approach was not new on the market, it was new to BorgWarner, whose calculations on the matter to this date have been based on approximations. READ MORE

  5. 4. The effect of increasing train lengths on the fatigue lifespan of a bridge.

    University essay from KTH/Bro- och stålbyggnad

    Author : Franck Monballiu; Wouter Schils; [2016]
    Keywords : Finite element model updating; sensitivity analysis; objective function; dynamic analysis; Banafjäl bridge; fatigue lifetime; high-speed bridge;

    Abstract : More and more pressure is exerted on railway infrastructure due to an increasing transportation demand and population density. Instead of expanding the net, a possible solution could lie in the enlargement of the capacity by operating longer trains rather than more short ones. READ MORE