Professional paper

https://doi.org/10.21278/TOF.42108

Reliability Estimation of Towed Grader Attachment Using Finite Element Analysis and Point Estimation

Dorin-Ion Dumitrascu ; Transilvania University of Brasov, Department of Automotive and Transport Engineering, Brasov, Romania
Cristin Olimpiu Morariu ; Transilvania University of Brasov, Department of ManufacturingEngineering, Brasov, Romania
Adela-Eliza Dumitrascu orcid.org/0000-0002-0272-9845 ; Transilvania University of Brasov, Department of ManufacturingEngineering, Brasov, Romania
Doina Valentina Ciobanu ; Transilvania University of Brasov, Faculty of Wood Engineering, Brasov, Romania

Abstract

The paper presents an analysis of the reliability of front blade, rear blade and frame of the towed grader as well as experimental validation of the results obtained from the finite element analysis. The analyzed prototype was designed for maintenance and repair of forest roads and equipped with two types of blades for cleaning and levelling the ground surface. Lifetimes of towed grader attachments can be estimated with high accuracy using three-parameter Weibull distribution. The values of the location parameter γ were determined by using the maximum values of the correlation coefficient, while the method of maximum likelihood was used for the point estimation of the parameters. Because higher values of the shape parameter had been obtained, the point estimation and estimation with confidence intervals of components lifetimes were performed. The analysis of the results indicates that the used assumptions may not fully take the complex stresses encountered in use into account.

Keywords

towed grader; reliability estimation; finite element analysis (FEA); Weibull distribution; confidence interval

Hrčak ID:

198193

URI

https://hrcak.srce.hr/198193

Publication date:

9.4.2018.

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