scholarly journals Correction: Practical implementation of the double linear damage rule and damage curve approach for treating cumulative fatigue damage

1981 ◽  
Vol 17 (4) ◽  
pp. R35-R42 ◽  
Author(s):  
S. S. Manson ◽  
G. R. Halford
Keyword(s):  
Fatigue Damage ◽  
Practical Implementation ◽  
Cumulative Fatigue Damage ◽  
Damage Rule

Nonlinear Cumulative Fatigue Damage Model

2011 ◽  
Vol 328-330 ◽  
pp. 1440-1444
Author(s):  
Hua Zou ◽  
Qiang Li ◽  
Shou Guang Sun
Keyword(s):  
Mathematical Model ◽  
Aluminum Alloy ◽  
Fatigue Life ◽  
Fatigue Damage ◽  
Welded Joint ◽  
Damage Model ◽  
Reasonable Explanation ◽  
Curve Method ◽  
Cumulative Fatigue Damage ◽  
Damage Rule

Cumulative fatigue damage is an important consideration in determining the fatigue life of structures. A cumulative linear damage rule cannot provide a reasonable explanation for cumulative fatigue damage, but a damage curve method based on nonlinear cumulative fatigue damage model can give a reasonable explanation. In this paper, a specific mathematical model is put forward, which is based on the damage curve method. In the model, miner formula is modified properly and an exponent formula is give out to fit the damage accumulate. According to a two-step fatigue test of aluminum–alloy welded joint, the comparison between the calculated results and the testing results is less than 5%. It shows that the model is reasonable and accuracy.

scholarly journals A New Cumulative Fatigue Damage Rule Based on Dynamic Residual S-N Curve and Material Memory Concept

Metals ◽  
2018 ◽  
Vol 8 (6) ◽  
pp. 456 ◽  
Author(s):  
Zhaochun Peng ◽  
Hong-Zhong Huang ◽  
Jie Zhou ◽  
Yan-Feng Li
Keyword(s):  
Fatigue Damage ◽  
Rule Based ◽  
Cumulative Fatigue Damage ◽  
Damage Rule

scholarly journals Parametric probabilistic approach for cumulative fatigue damage using double linear damage rule considering limited data

2019 ◽  
Vol 127 ◽  
pp. 246-258 ◽  
Author(s):  
João Paulo Dias ◽  
Stephen Ekwaro-Osire ◽  
Americo Cunha ◽  
Shweta Dabetwar ◽  
Abraham Nispel ◽  
...  
Keyword(s):  
Fatigue Damage ◽  
Probabilistic Approach ◽  
Limited Data ◽  
Cumulative Fatigue Damage ◽  
Damage Rule

Nonlinear Fatigue Damage Accumulation Under Random Loading

1996 ◽  
Vol 118 (2) ◽  
pp. 168-173 ◽  
Author(s):  
W. Q. Zhu ◽  
M. X. Jiang
Keyword(s):  
Fatigue Damage ◽  
Damage Accumulation ◽  
Stochastic Theory ◽  
Reliability Function ◽  
Random Loading ◽  
Fatigue Damage Accumulation ◽  
Probability Densities ◽  
Cumulative Fatigue Damage ◽  
Analytical Expressions ◽  
Damage Rule

The analytical expressions for the probability densities of the cumulative fatigue damage and fatigue life and for the reliability function are obtained for a mechanical or structural component subject to stationary random stress process on the basis of a stochastic theory of fatigue damage accumulation proposed by the first author and his co-worker and the Morrow’s nonlinear damage rule. The comparison between the results from Morrow’s and Palmgren-Miner’s damage rules for the case when the stress is a narrow-band stationary Gaussian process with zero mean is made and some important conclusions are drawn.

Pipeline Plain Dent Fatigue: A Comparison of Assessment Methodologies

2014 ◽  
Author(s):  
Sérgio B. Cunha ◽  
Ilson P. Pasqualino ◽  
Bianca C. Pinheiro
Keyword(s):  
Fatigue Test ◽  
Fatigue Damage ◽  
Fatigue Tests ◽  
Full Scale ◽  
Assessment Methodology ◽  
Test Results ◽  
Different Shapes ◽  
Cumulative Fatigue Damage ◽  
X80 Steels ◽  
Damage Rule

A collection of results of fatigue tests undertaken on full scale pipeline specimens containing unconstrained plain dents is presented. A total of 61 test results are reported, comprising dents of different shapes and depths, introduced in pipe sections with nominal diameters of 12″ and 24″, D/t ratios varying from 18.6 to 77.2 and made of API 5L X42, X46, X52, X60, X70 and X80 steels. The fatigue test results are used to compare five plain dent fatigue assessment methodologies. The assessment methodologies most widely used in the industry, namely, API 1156 and EPRG, are evaluated; each one of these has two different versions, evaluated independently. A dent assessment methodology previously proposed by the authors is also is included in the study. The classic Palmgren-Miner’s cumulative fatigue damage rule is employed in order to correlate the results, since all tests were carried out with two different pressure cycles. Only two of the evaluated methodologies presented a correlation with the fatigue tests that justifies recommending their application in the industry.

Fatigue damage analysis in an automobile stabilizer bar

2002 ◽  
Vol 216 (11) ◽  
pp. 865-871 ◽  
Author(s):  
E S Palma ◽  
E S dos Santos
Keyword(s):  
Fatigue Damage ◽  
Analytical Techniques ◽  
Front Suspension ◽  
Road Surfaces ◽  
Local Stresses ◽  
Fatigue Damage Analysis ◽  
Damage Theory ◽  
Cumulative Fatigue Damage ◽  
Critical Regions ◽  
Damage Rule

An analysis of fatigue damage in a stabilizer bar in the front suspension (McPherson) of a passenger car was performed. A cumulative fatigue damage theory (linear damage rule) together with experimental and analytical techniques of stress analysis are used to determine the fatigue damage imposed on the stabilizer bar, under both laboratory and actual conditions. Finite element models of the stabilizer bars were used to determine the local stresses at critical regions. These stresses were then measured in the laboratory, by using strain gauges bonded on the material. The assessments of fatigue damage of the stabilizer bar under actual conditions were performed with a component mounted on a vehicle, which was driven over different road surfaces and at different velocities. The results of both experiment types are correlated and discussed.

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