Fatigue damage analysis in an automobile stabilizer bar

Palma, Ernani Sales; Santos, Edvaldo S. dos

doi:10.1243/095440702321031414

Cited by 17 publications

(7 citation statements)

References 5 publications

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“…Based on the analysis of Table 5, the accuracy of the finite element simulation can be confirmed. Indeed, the average discrepancy of the simulated and testing stress outputs is limited to about 14 MPa, which is in agreement with the few similar works that could be retrieved from literature [27,28]. In addition, the stresses registered and calculated are always below the permissible stress condition reported in Equation (1) (89 MPa), confirming the reliability of the dimensioning condition with respect to the actual component behaviour.…”

Section: Road Simulator Testingsupporting

confidence: 89%

Correlation between Numerical and Experimental Structural Resistance of a Safety Relevant Aluminum Automotive Component

Cecchel

Ferrario²,

Mega³

et al. 2019

Metals

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Accurate implementation of weight reduction for the development of innovative safety-relevant components, such as suspension assemblies, requires a careful evaluation of the structural resistance. The validation of these critical parts usually employs Finite Element Analysis (FEA) during the design phase and laboratory tests on prototypes during later stages. However, the results of these established methods have rarely been numerically compared. The present paper introduces a method for comparing FEA and testing, based on the elaboration of micro-strains acquired with strain gauges positioned in specific regions. The model was applied to the real case study of an innovative lightweight cross beam. FEA simulations and bench tests under different conditions that were representative of the operating environments were carried out. Two different relevant configurations of fatigue bench tests were considered. Then, the data obtained from testing were numerically elaborated in order to compare them with the analytical results. Real data from in-field measurements were used. The cross beam endured at the elevate mission loads reproduced at the bench test. The FEA and testing results were aligned. The correlation method was proven to be reliable, since it made it possible not only to numerically evaluate the testing output, but also to validate the calculation tools, and it could be extended to similar applications in future.

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Section: Road Simulator Testingsupporting

confidence: 89%

Correlation between Numerical and Experimental Structural Resistance of a Safety Relevant Aluminum Automotive Component

Cecchel

Ferrario²,

Mega³

et al. 2019

Metals

View full text Add to dashboard Cite

show abstract

“…Hence, fatigue analysis is a main concern during automotive suspension design. In automotive industry, durability analysis of components is usually conducted through simulations before experimental verification [1]. During the fatigue simulation and analyses, the geometry, material properties, and loadings are the main key inputs to the fatigue life predictions [2].…”

Section: Introductionmentioning

confidence: 99%

Determining optimal suspension system parameters for spring fatigue life using design of experiment

Kong

Abdullah

Schramm

et al. 2019

Mechanics & Industry

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This paper presents the optimization of spring fatigue life associated with suspension system parameters using the design of experiment approach. The effects of suspension parameters on spring fatigue life were analyzed because this process can improve spring fatigue life from a distinct perspective. A quarter car model simulation was performed to obtain the force time histories for fatigue life prediction where the suspension parameters were adjusted. Multiple input regression and interaction plots were conducted to identify the interaction between these parameters. A full factorial experiment was performed to determine the optimal suspension settings that would maximize the spring fatigue life. For the regression, a high R 2 value of 0.9078 was obtained, indicating good fitting. The established regression showed normality and homoscedasticity for consistent prediction outcome. Reducing the spring stiffness and sprung mass while enhancing the damping coefficient is therefore suggested to enhance fatigue life.

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“…Palma and Santos 7 analysed a stabilizer bar in the front (McPherson) suspension of a passenger car. They integrated a cumulative fatigue damage theory with experimental and analytical techniques of stress analysis to determine the fatigue damage imposed on the stabilizer bar.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the locations of fatigue failure in a commercial vehicle cab using the virtual iteration method

Wang

2016

Proceedings of the Institution of Mechanical Engineers, Part D:

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In this paper, fatigue damage analysis and structural improvement of a commercial vehicle cab were carried out, in which a simulation technique and durability road tests were combined. A full-scale finite element model of the cab was established and then validated by means of physical testing and analysis of its stiffness and its modal performance. The loading spectra, in accordance with the durability road test, were obtained by adopting the virtual iteration method. With the established finite element model, the stress distributions in the cab under unit excitation were determined. The obtained stress distributions were then used to assess the total fatigue life of the cab by employing the strain-life (e-N) method; thus, the critical regions were determined. The results showed that some components near the pillars and mounts are easy to damage because of the stress concentrations. It was also demonstrated that the predicted regions are reliable, which was verified by comparison with the physical durability road tests. Finally, structural improvements in the critical structures were made; the fatigue life assessment of the improved cab showed an obvious improvement in its durability performance. KeywordsAssessment of fatigue failure locations, finite element analysis, virtual iteration, commercial vehicle cab, structural improvement Date

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Fatigue damage analysis in an automobile stabilizer bar

Cited by 17 publications

References 5 publications

Correlation between Numerical and Experimental Structural Resistance of a Safety Relevant Aluminum Automotive Component

Correlation between Numerical and Experimental Structural Resistance of a Safety Relevant Aluminum Automotive Component

Determining optimal suspension system parameters for spring fatigue life using design of experiment

Assessment of the locations of fatigue failure in a commercial vehicle cab using the virtual iteration method

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