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Titre du document / Document title

Stability and Failure Analysis of Steering Tie-rod

Auteur(s) / Author(s)

JIANG GONGFENG (1) ; ZHANG YILIANG (1) ; XU XUEDONG (2) ; DING DAWEI (2) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100124, CHINE
(2) Institute of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing 100124, CHINE

Résumé / Abstract

A new car in operation of only 8,000 km, because of malfunction, resulting in lost control and rammed into the edge of the road, and then the basic vehicle scrapped. According to the investigation of the site, it was found that the tie-rod of the car had been broken. For the subjective analysis of the accident and identifying the true causes of rupture of the tie-rod, a series of studies, from the angle of theory to experiment on the bended broken tie-rod, were conducted. The mechanical model was established; the stability of the defective tie-rod was simulated based on ANSYS software. Meanwhile, the process of the accident was simulated considering the effect of destabilization of different vehicle speed and direction of the impact. Simultaneously, macro graphic test, chemical composition analysis, microstructure analysis and SEM analysis of the fracture were implemented. The results showed that: 1) the toughness of the tie-rod is at a normal level, but there is some previous flaws. One quarter of the fracture surface has been cracked before the accident. However, there is no relationship between the flaw and this incident. The direct cause is the dynamic instability leading to the large deformation of impact loading. 2) The declining safety factor of the tie-rod greatly due to the previous flaws; the result of numerical simulation shows that previous flaw is the vital factor of structure instability, on the basis of the comparison of critical loads of the accident tie-rod and normal. The critical load can decrease by 51.3% when the initial defect increases 19.54% on the cross-sectional area, which meets the Theory of Koiter.

Revue / Journal Title

Proceedings of SPIE, the International Society for Optical Engineering    ISSN  0277-786X   CODEN PSISDG 

Source / Source

Congrès
ICEM 2008 :   ( International Conference on Experimental Mechanics 2008 )  ( 8-11 November 2008, Nanjing, China )
International Conference on Experimental Mechanics, Nanjing Shi , CHINE (2008)
2009  , vol. 7375 (2)[Note(s) : 2 vol., ] (10 ref.) ISBN 978-0-8194-7651-7 ; 0-8194-7651-X ;  Illustration : Illustration ;

Langue / Language

Anglais

Editeur / Publisher

Society of Photo-Optical Instrumentation Engineers, Bellingham, WA, ETATS-UNIS  (1981) (Revue)
SPIE, Bellingham, Wash., ETATS-UNIS  (2009) (Monographie)

Mots-clés anglais / English Keywords

Safety factor

;

Fractography

;

Scanning electron microscopy

;

Experimental study

;

Modeling

;

Microstructure

;

Chemical composition

;

Chemical analysis

;

Accident

;

Motor car

;

Tie rod

;

Mechanical shock

;

High strain

;

Dynamic stability

;

Surface crack

;

Fracture surface

;

Fracture toughness

;

Vehicle direction

;

Defect

;

Rupture

;

Mots-clés français / French Keywords

Facteur sécurité

;

Fractographie

;

Microscopie électronique balayage

;

Etude expérimentale

;

Modélisation

;

Microstructure

;

Composition chimique

;

Analyse chimique

;

Accident

;

Automobile

;

Tirant structure

;

Choc mécanique

;

Grande déformation

;

Stabilité dynamique

;

Fissure superficielle

;

Surface rupture

;

Ténacité

;

Direction véhicule

;

Défaut

;

Rupture

;

Mots-clés espagnols / Spanish Keywords

Factor seguridad

;

Fractografía

;

Microscopía electrónica barrido

;

Estudio experimental

;

Modelización

;

Microestructura

;

Composición química

;

Análisis químico

;

Accidente

;

Automóvil

;

Tirante

;

Choque mecánico

;

Gran deformación

;

Estabilidad dinámica

;

Fisura superficial

;

Superficie ruptura

;

Tenacidad

;

Dirección vehículo

;

Defecto

;

Ruptura

;

Localisation / Location

INIST-CNRS, Cote INIST : 21760, 35400017298804.1170

Nº notice refdoc (ud4) : 22179699



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