Fatigue life prediction of mechanical structures under stochastic loading

Leitner, Bohuš; Figuli, Lucia

doi:10.1051/matecconf/201815702024

Cited by 21 publications

(13 citation statements)

References 6 publications

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“…Therefore, the chassis including the frame is loaded with dynamic loads. Their characteristics, such amplitude and frequency are stochastic and they will cause different loads in comparison with performed static analyses [5,20,21]. Hence, future research in this field should be focused on obtaining input data, which will simulate more realistic loading of the frame structure.…”

Section: Fig 2 a Three-dimensional Model Of The Analysed Framementioning

confidence: 99%

Strength analysis of an off-road lorry frame

Dižo¹,

Blatnický²,

Dróździel³

et al. 2021

SJSUT.ST

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The lorry frame is the main carrying part of a lorry, composed of several components. These components are connected by joints into one structural unit and it forms the lorry chassis. The contribution of this article is focused on the strength analyses of a backbone frame, which is used on an off-road lorry chassis. Strength analyses are carried out utilising the finite element method. This article presents a created three-dimensional model of the frame and definition of boundary conditions (loads, the definition of degrees of freedom) needed for simulation computations. Results of the numerical calculations are the main parts of this article. Attention is mainly centred on the distribution of stresses of the frame under defined loads and its deformations.

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Section: Fig 2 a Three-dimensional Model Of The Analysed Framementioning

confidence: 99%

Strength analysis of an off-road lorry frame

Dižo¹,

Blatnický²,

Dróździel³

et al. 2021

SJSUT.ST

View full text Add to dashboard Cite

show abstract

“…For a specified model and planning values for the model parameters, it is possible to use a computer to simulate ALT experiments to see the kind of data that will be obtained and to visualize the variability from trial to trial. Such simulations provide an assessment of sampling uncertainty that will result from using a limited number of test specimens [9].…”

Section: -2-statistical Test Planningmentioning

confidence: 99%

Lifetime Test of Tracked Vehicle Torsion Bars using Monte Carlo Method

Furch

Nguyen²

2020

Emerg Sci J

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The article deals with the service life of torsion bars in tracked vehicles. The aim of the article is to show the suitability of accelerated tests and modelling for determining the service life of torsion bars, which takes many years in real operation. The design of a test bench for accelerated tests is presented together with limiting conditions, which were afterwards verified. Subsequently, a virtual model of the torsion bar of a tracked vehicle was created with the help of finite elements. Dynamic modelling was performed by MSC Adams software with a module using finite elements. Furthermore, the article shows the possibility of using the Monte Carlo method to determine the service life of torsion bars of tracked vehicles. The Monte Carlo utility of Accelerated Life Testing Analysis (ALTA) software is used to obtain failure data at specified test stress levels. Using the Monte Carlo simulation, one data set is generated containing values that are arranged in dependence on the specific lifetime distribution of the Weibull distribution. Finally, a comparison of the experiment with the calculated values is performed. The results obtained can be used to compile an accelerated test plan. This modelling design saves a lot of money and time to determine the life of the torsion bar in tracked vehicles.

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Section: Statistical Test Planningmentioning

confidence: 99%

Accelerated testing of track vehicle torsion bar

Furch

Nguyen²,

Stodola

2020

MATEC Web Conf.

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The suspension system of track vehicles is often equipped with torsion bars. The torsion bar is a key element of the vehicle's suspension system. The service life of torsion bars depends primarily on the quality of the material used, the diameter of the torsion bars and the method of attachment and placement. In order to obtain the characteristics of the torsion bar, an experimental test stand was created on which accelerated tests were performed. Furthermore, a virtual model of torsion bar operation was created. The torsion bar was modelled using finite elements (FE part). Dynamic simulation was performed using MSC Adams software. Finally, the values measured in the accelerated tests and the results of simulations were compared. Comparing the values found, it was proved that this difference is not significant. This virtual model can be used to investigate the service life of torsion bars and to predict their service life.

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Fatigue life prediction of mechanical structures under stochastic loading

Cited by 21 publications

References 6 publications

Strength analysis of an off-road lorry frame

Strength analysis of an off-road lorry frame

Lifetime Test of Tracked Vehicle Torsion Bars using Monte Carlo Method

Accelerated testing of track vehicle torsion bar

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