FATIGUE LIFE EVALUATION OF SUSPENSION KNUCKLE USING MULTIBODY SIMULATION TECHNIQUE

Suspension is part of automotive systems, providing both vehicle control and passenger comfort. The knuckle is an important part within the suspension system, constantly encountering the cyclic loads subjecting it to fatigue failure. This paper presents an evaluation of the fatigue characteristics o...

Full description

Bibliographic Details
Main Authors: A.G.A. Rahman, M.M. Rahman, M. Kamal
Format: Article
Language:English
Published: Universiti Malaysia Pahang 2012-12-01
Series:Journal of Mechanical Engineering and Sciences
Subjects:
Online Access:http://jmes.ump.edu.my/images/Volume%203/8_Kamal%20et%20al.pdf
id doaj-882b8ce941fd4bd99ba3a26efd16e1f0
record_format Article
spelling doaj-882b8ce941fd4bd99ba3a26efd16e1f02020-11-25T01:27:41ZengUniversiti Malaysia PahangJournal of Mechanical Engineering and Sciences2289-46592231-83802012-12-013291300FATIGUE LIFE EVALUATION OF SUSPENSION KNUCKLE USING MULTIBODY SIMULATION TECHNIQUEA.G.A. RahmanM.M. RahmanM. KamalSuspension is part of automotive systems, providing both vehicle control and passenger comfort. The knuckle is an important part within the suspension system, constantly encountering the cyclic loads subjecting it to fatigue failure. This paper presents an evaluation of the fatigue characteristics of a knuckle using multibody simulation (MBS) techniques. Load time history extracted from the MBS is used for stress analysis. An actual road profile of road bumps was used as the input to MBS. The stress fluctuations for fatigue simulations are considered with the road profile. The strain-life method is utilized to assess the fatigue life. The instantaneous stress distributions and maximum principal stress are used for fatigue life predictions. Mesh sensitivity analysis has been performed. The results show that the steering link in the knuckle is found to be the most susceptible region for fatigue failure. The number of times the knuckle can manage a road bump at 40 km/hr is determined to be approximately 371 times with a 50% certainty of survival. The proposed method of using the loading time history extracted from MBS simulation for fatigue life estimation is found to be very promising for the accurate evaluation of the performance of suspension system components.http://jmes.ump.edu.my/images/Volume%203/8_Kamal%20et%20al.pdfFatiguemultibody simulationsuspension systemknucklestrain-life methodmaximum principal stress.
collection DOAJ
language English
format Article
sources DOAJ
author A.G.A. Rahman
M.M. Rahman
M. Kamal
spellingShingle A.G.A. Rahman
M.M. Rahman
M. Kamal
FATIGUE LIFE EVALUATION OF SUSPENSION KNUCKLE USING MULTIBODY SIMULATION TECHNIQUE
Journal of Mechanical Engineering and Sciences
Fatigue
multibody simulation
suspension system
knuckle
strain-life method
maximum principal stress.
author_facet A.G.A. Rahman
M.M. Rahman
M. Kamal
author_sort A.G.A. Rahman
title FATIGUE LIFE EVALUATION OF SUSPENSION KNUCKLE USING MULTIBODY SIMULATION TECHNIQUE
title_short FATIGUE LIFE EVALUATION OF SUSPENSION KNUCKLE USING MULTIBODY SIMULATION TECHNIQUE
title_full FATIGUE LIFE EVALUATION OF SUSPENSION KNUCKLE USING MULTIBODY SIMULATION TECHNIQUE
title_fullStr FATIGUE LIFE EVALUATION OF SUSPENSION KNUCKLE USING MULTIBODY SIMULATION TECHNIQUE
title_full_unstemmed FATIGUE LIFE EVALUATION OF SUSPENSION KNUCKLE USING MULTIBODY SIMULATION TECHNIQUE
title_sort fatigue life evaluation of suspension knuckle using multibody simulation technique
publisher Universiti Malaysia Pahang
series Journal of Mechanical Engineering and Sciences
issn 2289-4659
2231-8380
publishDate 2012-12-01
description Suspension is part of automotive systems, providing both vehicle control and passenger comfort. The knuckle is an important part within the suspension system, constantly encountering the cyclic loads subjecting it to fatigue failure. This paper presents an evaluation of the fatigue characteristics of a knuckle using multibody simulation (MBS) techniques. Load time history extracted from the MBS is used for stress analysis. An actual road profile of road bumps was used as the input to MBS. The stress fluctuations for fatigue simulations are considered with the road profile. The strain-life method is utilized to assess the fatigue life. The instantaneous stress distributions and maximum principal stress are used for fatigue life predictions. Mesh sensitivity analysis has been performed. The results show that the steering link in the knuckle is found to be the most susceptible region for fatigue failure. The number of times the knuckle can manage a road bump at 40 km/hr is determined to be approximately 371 times with a 50% certainty of survival. The proposed method of using the loading time history extracted from MBS simulation for fatigue life estimation is found to be very promising for the accurate evaluation of the performance of suspension system components.
topic Fatigue
multibody simulation
suspension system
knuckle
strain-life method
maximum principal stress.
url http://jmes.ump.edu.my/images/Volume%203/8_Kamal%20et%20al.pdf
work_keys_str_mv AT agarahman fatiguelifeevaluationofsuspensionknuckleusingmultibodysimulationtechnique
AT mmrahman fatiguelifeevaluationofsuspensionknuckleusingmultibodysimulationtechnique
AT mkamal fatiguelifeevaluationofsuspensionknuckleusingmultibodysimulationtechnique
_version_ 1725103797975384064