Microstructural behaviour study and FEA-based fatigue simulation on parabolic leaf spring

F. N. Ahmad Refngah, Shahrum Abdullah, Azman Jalar @ Jalil, L. B. Chua

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

It is compulsory to have a good fatigue life to a component that is heavily subjected to cyclic loading. One of the good examples is parabolic spring, which is one of the components in suspension system for large vehicles. It serves to absorb, store and release back the damping energy due to road irregularity, bump and holes. These activities involve a lot of camber deflection that caused by the tension and compression loads. In reality, the loading that subjected to parabolic spring is variable amplitude loading, but most of the manufacturer used constant amplitude (CA) loading for the fatigue test. The objective of this paper is to relate the simulation result with the microstructure behaviour of the leaf spring that failed due to fatigue. A full scale fatigue test was carried out until that parabolic spring meet failure. In order to investigate the fatigue life, CA signal was generated based on an actual fatigue test on the parabolic spring, and it was then analysed using the FEA-based fatigue simulation. A microstructure study was then performed for both fracture and non-fracture area. From the FEA-based simulation, it gave the prediction on damage that occurred at the critical area and also the prediction on the lowest cycle with respect to the FEA model. In the actual fatigue test, the failure was occurred at the centre part of the spring, which is at bolt join of assembly hole. The microstructure analysis showed that the grain at the fracture area indicated some different from the non-fracture area in term of size, phase and precipitation of carbon.

Original languageEnglish
Title of host publicationKey Engineering Materials
Pages419-424
Number of pages6
Volume462-463
DOIs
Publication statusPublished - 2011
Event8th International Conference on Fracture and Strength of Solids 2010, FEOFS2010 - Kuala Lumpur
Duration: 7 Jun 20109 Jun 2010

Publication series

NameKey Engineering Materials
Volume462-463
ISSN (Print)10139826

Other

Other8th International Conference on Fracture and Strength of Solids 2010, FEOFS2010
CityKuala Lumpur
Period7/6/109/6/10

Fingerprint

Leaf springs
Fatigue of materials
Finite element method
Microstructure
Cambers
Bolts
Suspensions
Compaction
Carbon
Damping

Keywords

  • Fatigue
  • FEA
  • Microstructure
  • Parabolic spring steel

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Ahmad Refngah, F. N., Abdullah, S., Jalar @ Jalil, A., & Chua, L. B. (2011). Microstructural behaviour study and FEA-based fatigue simulation on parabolic leaf spring. In Key Engineering Materials (Vol. 462-463, pp. 419-424). (Key Engineering Materials; Vol. 462-463). https://doi.org/10.4028/www.scientific.net/KEM.462-463.419

Microstructural behaviour study and FEA-based fatigue simulation on parabolic leaf spring. / Ahmad Refngah, F. N.; Abdullah, Shahrum; Jalar @ Jalil, Azman; Chua, L. B.

Key Engineering Materials. Vol. 462-463 2011. p. 419-424 (Key Engineering Materials; Vol. 462-463).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ahmad Refngah, FN, Abdullah, S, Jalar @ Jalil, A & Chua, LB 2011, Microstructural behaviour study and FEA-based fatigue simulation on parabolic leaf spring. in Key Engineering Materials. vol. 462-463, Key Engineering Materials, vol. 462-463, pp. 419-424, 8th International Conference on Fracture and Strength of Solids 2010, FEOFS2010, Kuala Lumpur, 7/6/10. https://doi.org/10.4028/www.scientific.net/KEM.462-463.419
Ahmad Refngah FN, Abdullah S, Jalar @ Jalil A, Chua LB. Microstructural behaviour study and FEA-based fatigue simulation on parabolic leaf spring. In Key Engineering Materials. Vol. 462-463. 2011. p. 419-424. (Key Engineering Materials). https://doi.org/10.4028/www.scientific.net/KEM.462-463.419
Ahmad Refngah, F. N. ; Abdullah, Shahrum ; Jalar @ Jalil, Azman ; Chua, L. B. / Microstructural behaviour study and FEA-based fatigue simulation on parabolic leaf spring. Key Engineering Materials. Vol. 462-463 2011. pp. 419-424 (Key Engineering Materials).
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