A New Fatigue Testing Machine for Investigating the Behavior of Small Shear-Mode Fatigue Cracks

M. Endo, S. Okazaki, Hisao Matsunaga, S. Moriyama, K. Munaoka, K. Yanase

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The investigation of the behavior of small shear-mode fatigue cracks in the high-cycle fatigue regime is essential to understand the mechanism of rolling-contact fatigue failures, such as flaking in bearings and shelling in rails, from the fracture mechanics point of view. The stable growth of a shear-mode fatigue crack was achieved by applying static compression to a specimen in a cyclic torsion fatigue test. This loading condition is usually obtained by a combined tension-torsion testing machine with a servo-hydraulic control system. In this study, a new testing machine was developed and found to be superior to the servo-hydraulic testing machine in terms of price, operation/maintenance costs, operating speed, and installation volume. For substantiation and demonstration purposes, a shear-mode fatigue crack growth test with a bearing steel was also carried out using both the new and the conventional servo-hydraulic testing machines. The experiments revealed that under the same loading conditions, nonpropagating shear-mode cracks of similar size and geometry could be obtained by the respective testing machines. Thus, it was concluded that the new testing machine has equivalent capabilities to the servo-hydraulic testing machine in performing shear-mode fatigue crack growth tests.

Original languageEnglish
Pages (from-to)1065-1073
Number of pages9
JournalExperimental Techniques
Volume40
Issue number3
DOIs
Publication statusPublished - Jun 1 2016

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Fatigue testing
Testing
Bearings (structural)
Hydraulics
Fatigue of materials
Fatigue crack propagation
Torsion testing
Tensile testing
Operating costs
Fracture mechanics
Torsional stress
Rails
Fatigue cracks
Compaction
Demonstrations
Cracks
Control systems
Geometry
Steel
Experiments

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering

Cite this

A New Fatigue Testing Machine for Investigating the Behavior of Small Shear-Mode Fatigue Cracks. / Endo, M.; Okazaki, S.; Matsunaga, Hisao; Moriyama, S.; Munaoka, K.; Yanase, K.

In: Experimental Techniques, Vol. 40, No. 3, 01.06.2016, p. 1065-1073.

Research output: Contribution to journalArticle

Endo, M. ; Okazaki, S. ; Matsunaga, Hisao ; Moriyama, S. ; Munaoka, K. ; Yanase, K. / A New Fatigue Testing Machine for Investigating the Behavior of Small Shear-Mode Fatigue Cracks. In: Experimental Techniques. 2016 ; Vol. 40, No. 3. pp. 1065-1073.
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