Calculation of the fatigue life of a surface-hardened shaft by the finite-element method

Heikki Keinänen, Klaus Rahka

Research output: Book/ReportReport

Abstract

This report addresses the problems encountered in machine component design when the material properties vary in the load carrying cross-section and when purely elastic design is unsuitable that is when fatigue may be an imminent failure mechanism. The problem encountered is solved by an elasto-plastic finite-element calculation for the surface hardened cylindrical SAE shaft in bending, torsion and combined bending torsion. The effective plastic strains in the cross section of me shaft are calculated and the fatigue life of the shaft is predicted according to the local strain approach. The analysed shaft is surface hardened by induction heating, the hardness and other material properties thus varying between me core and the surface. The loading is bending or torsion. Only the monotonic first quarter cycle of me loading is calculated. The fatigue life is evaluated using the calculated effective plastic strain amplitude.
Original languageEnglish
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Number of pages27
ISBN (Print)951-38-4070-0
Publication statusPublished - 1992
MoE publication typeNot Eligible

Publication series

SeriesVTT Publications
Number92
ISSN1235-0621

Fingerprint

Torsional stress
Bending (forming)
Fatigue of materials
Finite element method
Plastic deformation
Materials properties
Bending (deformation)
Induction heating
Machine components
Hardness
Plastics

Keywords

  • shafts (machine elements)
  • surface hardening
  • fatigue
  • failure
  • fatigue life
  • predictions
  • finite element analysis
  • bending
  • torsion
  • strains

Cite this

Keinänen, H., & Rahka, K. (1992). Calculation of the fatigue life of a surface-hardened shaft by the finite-element method. Espoo: VTT Technical Research Centre of Finland. VTT Publications, No. 92
Keinänen, Heikki ; Rahka, Klaus. / Calculation of the fatigue life of a surface-hardened shaft by the finite-element method. Espoo : VTT Technical Research Centre of Finland, 1992. 27 p. (VTT Publications; No. 92).
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abstract = "This report addresses the problems encountered in machine component design when the material properties vary in the load carrying cross-section and when purely elastic design is unsuitable that is when fatigue may be an imminent failure mechanism. The problem encountered is solved by an elasto-plastic finite-element calculation for the surface hardened cylindrical SAE shaft in bending, torsion and combined bending torsion. The effective plastic strains in the cross section of me shaft are calculated and the fatigue life of the shaft is predicted according to the local strain approach. The analysed shaft is surface hardened by induction heating, the hardness and other material properties thus varying between me core and the surface. The loading is bending or torsion. Only the monotonic first quarter cycle of me loading is calculated. The fatigue life is evaluated using the calculated effective plastic strain amplitude.",
keywords = "shafts (machine elements), surface hardening, fatigue, failure, fatigue life, predictions, finite element analysis, bending, torsion, strains",
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Keinänen, H & Rahka, K 1992, Calculation of the fatigue life of a surface-hardened shaft by the finite-element method. VTT Publications, no. 92, VTT Technical Research Centre of Finland, Espoo.

Calculation of the fatigue life of a surface-hardened shaft by the finite-element method. / Keinänen, Heikki; Rahka, Klaus.

Espoo : VTT Technical Research Centre of Finland, 1992. 27 p. (VTT Publications; No. 92).

Research output: Book/ReportReport

TY - BOOK

T1 - Calculation of the fatigue life of a surface-hardened shaft by the finite-element method

AU - Keinänen, Heikki

AU - Rahka, Klaus

N1 - Project code: MET00041

PY - 1992

Y1 - 1992

N2 - This report addresses the problems encountered in machine component design when the material properties vary in the load carrying cross-section and when purely elastic design is unsuitable that is when fatigue may be an imminent failure mechanism. The problem encountered is solved by an elasto-plastic finite-element calculation for the surface hardened cylindrical SAE shaft in bending, torsion and combined bending torsion. The effective plastic strains in the cross section of me shaft are calculated and the fatigue life of the shaft is predicted according to the local strain approach. The analysed shaft is surface hardened by induction heating, the hardness and other material properties thus varying between me core and the surface. The loading is bending or torsion. Only the monotonic first quarter cycle of me loading is calculated. The fatigue life is evaluated using the calculated effective plastic strain amplitude.

AB - This report addresses the problems encountered in machine component design when the material properties vary in the load carrying cross-section and when purely elastic design is unsuitable that is when fatigue may be an imminent failure mechanism. The problem encountered is solved by an elasto-plastic finite-element calculation for the surface hardened cylindrical SAE shaft in bending, torsion and combined bending torsion. The effective plastic strains in the cross section of me shaft are calculated and the fatigue life of the shaft is predicted according to the local strain approach. The analysed shaft is surface hardened by induction heating, the hardness and other material properties thus varying between me core and the surface. The loading is bending or torsion. Only the monotonic first quarter cycle of me loading is calculated. The fatigue life is evaluated using the calculated effective plastic strain amplitude.

KW - shafts (machine elements)

KW - surface hardening

KW - fatigue

KW - failure

KW - fatigue life

KW - predictions

KW - finite element analysis

KW - bending

KW - torsion

KW - strains

M3 - Report

SN - 951-38-4070-0

T3 - VTT Publications

BT - Calculation of the fatigue life of a surface-hardened shaft by the finite-element method

PB - VTT Technical Research Centre of Finland

CY - Espoo

ER -

Keinänen H, Rahka K. Calculation of the fatigue life of a surface-hardened shaft by the finite-element method. Espoo: VTT Technical Research Centre of Finland, 1992. 27 p. (VTT Publications; No. 92).