Analysis of torsion bar failure occurring during the pre-strained manufacturing for heavy off-road tracked vehicles

To improve the flexibility performance of tracked vehicles, lots of jobs has been done in the refit of driveline. Therefore, tough risks are transferred to the strength and fatigue life of suspension device. Through analyzing the effect of driveline refit to the performance of suspension device, a scheme that enhancing the stiffness of the torsion bar is proposed. By using the MSC.Patran/Nastran software, the model of suspension device is constructed, via the simulation of the stress state and fatigue strength that is loaded on the main suspension parts at the static equilibrium position and the maximum stroke position of equilibrium elbow, and performance testing on actual roads, this scheme is considered to be reliable.

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Torsion-bar spring and damping systems of tracked vehicles

Journal of Terramechanics ◽

10.1016/0022-4898(85)90016-3 ◽

1985 ◽

Vol 22 (4) ◽

pp. 195-203 ◽

Cited By ~ 4

Author(s):

G.H. Hohl

Keyword(s):

Tracked Vehicles ◽

Torsion Bar ◽

Damping Systems

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Lifetime Test of Tracked Vehicle Torsion Bars using Monte Carlo Method

Emerging Science Journal ◽

10.28991/esj-2020-01238 ◽

2020 ◽

Vol 4 (5) ◽

pp. 376-389

Author(s):

Jan Furch ◽

Quy Hung Nguyen

Keyword(s):

Monte Carlo ◽

Monte Carlo Method ◽

Finite Elements ◽

Service Life ◽

Dynamic Modelling ◽

Accelerated Tests ◽

Tracked Vehicle ◽

Data Set ◽

Tracked Vehicles ◽

Torsion Bar

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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