A stochastic damage accumulation model for crack initiation in high-cycle fatigue

2000 ◽  
Vol 23 (5) ◽  
pp. 375-380 ◽  
Author(s):  
Ihara ◽  
Tanaka
Keyword(s):  
Crack Initiation ◽  
Damage Accumulation ◽  
High Cycle Fatigue ◽  
Cycle Fatigue ◽  
Accumulation Model ◽  
Damage Accumulation Model ◽  
Stochastic Damage

scholarly journals A General Damage Accumulation Model for Multiaxial, Proportional High Cycle Fatigue Loadings With Sines, Crossland and Dang Van Criteria

2019 ◽  
Vol 86 (12) ◽  
Author(s):  
Akbar Ghazavizadeh ◽  
Fodil Meraghni ◽  
Laurent Peltier ◽  
Nadine Bourgeois
Keyword(s):  
Differential Equation ◽  
Damage Accumulation ◽  
High Cycle Fatigue ◽  
Multiaxial Fatigue ◽  
Model Parameters ◽  
Cycle Fatigue ◽  
Damage Functions ◽  
Identification Scheme ◽  
Accumulation Model ◽  
Damage Accumulation Model

Abstract In this paper, a key differential equation is proposed to formulate fatigue damage evolution in metallic alloys under multiaxial, multiblock, proportional loadings in high cycle fatigue (HCF) and very high cycle fatigue (VHCF) regimes. This differential equation possesses two main components: one is a stress function to accommodate the adopted fatigue criterion and the other one is a characteristic damage function that serves to capture the HCF response of alloys. Two distinct characteristic damage functions with three different multiaxial fatigue criteria, namely Sines, Crossland, and Dang Van criteria, are examined to develop six (out of many possible) variants of the presented damage accumulation model. As a validation measure, Chaboche’s HCF damage model is retrieved as a specific case of the developed formalism. For model parameters identification, an ad hoc two-level identification scheme is designed and numerically verified. It is demonstrated that endurance limit, which is determined from fully reversed HCF tests (i.e., R = −1), can be identified from fatigue tests with positive stress ratio (R > 0), thus making our development quite suitable for specimens prone to buckling under compression. Another salient feature of the devised identification scheme is its capability in extracting model parameters from noisy data.

Low Cycle Fatigue and Crack Grow in Powder Nickel Alloy under Turbine Disk Wave Form Loading: Validation of Damage Accumulation Model

2013 ◽  
Vol 467 ◽  
pp. 312-316 ◽  
Author(s):  
M. Nikhamkin ◽  
A. Ilinykh
Keyword(s):  
Crack Initiation ◽  
Damage Accumulation ◽  
Low Cycle Fatigue ◽  
Fatigue Crack Initiation ◽  
Wave Form ◽  
Cycle Fatigue ◽  
Accumulation Model ◽  
Cyclic Durability ◽  
Durability Prediction ◽  
Damage Accumulation Model

Experimental verification of the damage accumulation model of low cycle fatigue crack initiation and growth is executed. Loading wave form typical for discs of gas turbine engines is studied. Linear damage accumulation model is found to give acceptable accuracy for crack initiation and growth in powder nickel alloys. This model is acceptable for disc cyclic durability prediction.

A NEW SIMPLE DAMAGE ACCUMULATION MODEL FOR PREDICTING OF AN ASPHALT CONCRETE CYCLIC STRENGTH

2018 ◽  
Vol 431 (5) ◽  
pp. 38-47
Author(s):  
A. I. Iskakbayev ◽  
◽  
Bagdat Teltayev ◽  
Rossi C. Oliviero ◽  
K. Estayev ◽  
...  
Keyword(s):  
Asphalt Concrete ◽  
Damage Accumulation ◽  
Cyclic Strength ◽  
Accumulation Model ◽  
Damage Accumulation Model
Sign in / Sign up

Export Citation Format

Share Document