Random vibration fatigue life estimation of lower suspension arm of a Sedan car

2016 ◽  
pp. 333-338
Author(s):  
Pinank Patel ◽  
Vivek Patel ◽  
S Khandare
Keyword(s):  
Fatigue Life ◽  
Random Vibration ◽  
Life Estimation ◽  
Fatigue Life Estimation ◽  
Vibration Fatigue

Application of Power Spectral Density Method to Fatigue Life Estimation of the Axle Structure

2014 ◽  
Vol 487 ◽  
pp. 272-275
Author(s):  
Rui Feng Guo ◽  
Peng Li Wang
Keyword(s):  
Fatigue Life ◽  
Spectral Density ◽  
Density Function ◽  
Power Spectral Density ◽  
Random Vibration ◽  
Spectral Density Function ◽  
Power Spectral Density Function ◽  
Life Estimation ◽  
Power Spectral ◽  
Fatigue Life Estimation

Based on the random vibration theory, fatigue strength theory and Miner cumulative damage theory, the formulas for estimation of fatigue life which can be coped with narrowband and broadband random vibration was derived by the peak distribution function. The power spectral density function of axle structure is deduced after the power spectral density of standard road and the vibration model of wheel had studying. Combined the power spectral density function with broadband random vibration fatigue life estimation formula, the fatigue life of axle structure was obtained. This method is simple and has a strong engineering practicality.

Fatigue Life Estimation Using Frequency Domain Technique and Probabilistic Linear Cumulative Damage Model

2020 ◽  
Author(s):  
Vagner Pascualinotto Junior ◽  
Diego Felipe Sarzosa Burgos
Keyword(s):  
Fatigue Life ◽  
Frequency Domain ◽  
Structural Component ◽  
Random Vibration ◽  
Fatigue Behavior ◽  
Pressure Vessels ◽  
Nuclear Industry ◽  
Material Behavior ◽  
Life Estimation ◽  
Fatigue Life Estimation

Abstract Engineering critical structures, such as pressure vessels and pipelines, are designed to withstand a variety of in-service loading specific to their intended application. Random vibration excitation is observed in most of the structural component applications in the offshore, aerospace, and nuclear industry. Likewise, fatigue life estimation for such components is fundamental to verify the design robustness assuring structural integrity throughout service. The linear damage accumulation model (Palmgren-Miner rule) is still largely used for damage assessment on fatigue estimations, even though, its limitations are well-known. The fact that fatigue behavior of materials exposed to cyclic loading is a random phenomenon at any scale of description, at a specimen scale, for example, fatigue initiation sites, inclusions, defects, and trans-granular crack propagation are hardly predicted, indicates that a probabilistic characterization of the material behavior is needed. In this work, the methodology was applied to a Titanium alloy structural component. Low alloyed titanium alloys have no tendency to corrosion cracking in high-temperature high-pressure water containing impurities of chloride and oxygen found in a steam generator of nuclear power plants. The inherent uncertainties of the fatigue life and fatigue strength of the material are characterized using the random fatigue limit (RFL) statistic method. Furthermore, a frequency domain technique is used to determine the response power spectrum density (PSD) function of a structural component subjected to a random vibration profile excitation. The fatigue life of the component is then estimated through a probabilistic linear damage cumulative model.

scholarly journals Fatigue life estimation under multi-axial random loading in light poles

2015 ◽  
Vol 37 ◽  
pp. 183
Author(s):  
Kazem Reza Kashyzadeh
Keyword(s):  
Fatigue Life ◽  
Random Vibration ◽  
Equivalent Stress ◽  
Loading Conditions ◽  
Random Loading ◽  
Life Estimation ◽  
Fatigue Life Estimation ◽  
Light Pole ◽  
Variable Wind ◽  
Random Vibration Analysis

In the present paper, fatigue life of light poles under multi-axial random loading based on the variable wind direction and speed has been studied. To achieve these purposes, light pole is simulated with all loading conditions in ABAQUS Software. To consider to the three storm days as the critical loading conditions, Random vibration analysis has been performed to obtain stress histories and equivalent stress. Finally, Calculate fatigue life of light pole by using Dirlik Theory.

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