In situ and experimental analysis of longitudinal load on carbody fatigue life using nonlinear damage accumulation

Sharma, Satish C.; Sharma, Rakesh Chandmal; Lee, Jaesun

doi:10.1177/10567895211046043

Cited by 31 publications

(6 citation statements)

References 40 publications

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“…Remarkably, in contrast to the upper left portion of the micrograph, this portion of the microstructure exhibits a discontinuous distribution of the β-phase. The literature indicates that the beginning of the AZ91D alloy's corrosion processes is intimately associated with the β-phase morphology [29,30]. When dispersed uniformly throughout the α-Mg matrix, it functions as a dissolution inhibitor.…”

Section: Corrosion and Erosion Performance 41 Corrosion Performance O...mentioning

confidence: 99%

A contrastive characterization of pure Mg and AZ91D alloy based on the testing of mechanical, corrosion, wear, and erosion properties

Rallabandi,

Srinivas,

Palli

et al. 2024

Eng. Res. Express

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Magnesium alloy of grade AZ91D is utilized for a variety of applications in aircraft design and frames, as well as vehicle engine radiators, bumpers, and suspension components to reduce the weight of automobiles. This research compared the mechanical, corrosion, wear, and erosion resistance of pure Mg to that of AZ91 alloy. The corrosion media was NaCl, NaOH, and MgSO4, and the weight loss method was utilised to evaluate corrosion. The pin-on-disc configuration was utilized to assess the dry sliding wear mechanism of the Pure Mg and AZ91D alloy. Pure monolithic Mg and AZ91D magnesium alloy have a low resistance to wear as a result of an increase in contact temperature brought about by a shift of operational conditions. Erosive wear is caused when solid particles in a liquid or air jet strike a surface. Significantly influencing the erosive wear are particle velocity, impact angle, and erodent particle size. In this work, the erosive wear of AZ91D was studied using an Air jet erosion tester. SiO2 was used as the eroding material, and the flow rate of the eroding material and air was 5gm/min. The erosive factor experiments are designed using Taguchi orthogonal array (L16). The erosive factor response is erosion rate and primarily regulated by three factors as angle (30°, 45°, 60°, and 90°), time (5 and 10 min) and, contact pressure (1 and 2bar). The results of the experiments showed that the rate of wear increased with increasing pressure, and that the angle of impact of the jet at 60° caused the most wear of any of the tested angles. Analysis of variance (ANOVA) shows that time is the most important factor in determining erosive rate for AZ91D. SEM is used to investigate the structure and morphology of worn-out materials, and its findings are then confirmed.

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Section: Corrosion and Erosion Performance 41 Corrosion Performance O...mentioning

confidence: 99%

A contrastive characterization of pure Mg and AZ91D alloy based on the testing of mechanical, corrosion, wear, and erosion properties

Rallabandi,

Srinivas,

Palli

et al. 2024

Eng. Res. Express

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“…Kong et al 22 predicted fatigue life of coil springs based on the Coffin–Manson, Morrow, and Smith–Watson–Topper strain–life models by developing the hybrid multi‐layer perceptron artificial neural network. Sharma et al 23 obtained the car‐body damage by a nonlinear model combined with the modified Chaboche with Cauchy MF model damage accumulation theory. Shangguan et al 24 proposed a fatigue strength assessment of the welded joints of a head car body model in view of multiaxial stress criteria and cumulative fatigue damage under variable cyclic loads.…”

Section: Introductionmentioning

confidence: 99%

Aerodynamic fatigue evaluation of the equipment cabin of high‐speed trains based on sub‐zone loading method

Xiao,

Liang,

Sun

et al. 2024

Fatigue Fract Eng Mat Struct

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The equipment cabins of high‐speed trains encountered alternating pressure loads during operation. A fatigue evaluation methodology based on sub‐zone aerodynamic loading was proposed. Theoretical model was given between pressure load at each zone and the accompanying six structural stress components. Stress recovery matrix was formulated by finite element analysis (FEA) in sub‐zone loading cases to relate the stress to the measured pressure loads. Vehicle test gathered the pressure time‐history data of cabin sub‐zones at the head car in different ambient conditions, from which the two‐dimensional stress spectrum was derived by rain‐flow counting. The fatigue damage of welds was then assessed utilizing the Miner's and Corten Dolan's rules, yielding maximum equivalent damages of 0.72 and 0.23, respectively. The structural fatigue damage under high environmental wind conditions was 1–3 times greater than in calm weather. Nonetheless, the fatigue damage incurred by the metal matrix was significantly lower, demonstrating a substantial safety margin.

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“…To solve the deficiency of LDR, many researchers have worked on NLDR (Sharma et al., 2022; Zhu et al., 2022), which considers that the relationship between fatigue damage and loading cycle ratio is not linear. Manson and Halford (1981) proposed the M-H model under complex loading conditions.…”

Section: Introductionmentioning

confidence: 99%

Combined high and low cycle fatigue life prediction model based on damage curve method considering loading interaction effect

Hou

Wang

Guo

et al. 2022

International Journal of Damage Mechanics

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Through analyzing the characteristics of the Miner’s rule and the Manson-Halford (M-H) model, a nonlinear fatigue damage accumulation model is established based on the damage curve method under combined high and low cycle fatigue loading. In this model, an interaction factor related to the maximum stress and high cycle stress range is proposed to consider the loading interaction effect. Furthermore, the proposed model does not require any additional material parameters except for the S-N curve parameters. The experimental data of five materials, including TC11 alloy, 2024-T3 aluminum alloy, 45 steel, LY12-CZ aluminum alloy, and GH4033 Ni-based alloy, are introduced to verify the proposed model. Compared with the Miner’s rule and the M-H model, most of the prediction results by the proposed model are within the life factor range of 2, implying the established model has higher prediction accuracy.

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In situ and experimental analysis of longitudinal load on carbody fatigue life using nonlinear damage accumulation

Cited by 31 publications

References 40 publications

A contrastive characterization of pure Mg and AZ91D alloy based on the testing of mechanical, corrosion, wear, and erosion properties

A contrastive characterization of pure Mg and AZ91D alloy based on the testing of mechanical, corrosion, wear, and erosion properties

Aerodynamic fatigue evaluation of the equipment cabin of high‐speed trains based on sub‐zone loading method

Combined high and low cycle fatigue life prediction model based on damage curve method considering loading interaction effect

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