RESEARCH PAPER
Low Cycle Fatigue of Steel in Strain Controled Cyclic Bending
1
Faculty of Mechanical Engineering, Department of Mechanics and Machine Design, Opole University of Technology, ul. Mikołajczyka 5, 45-271 Opole, Poland
Submission date: 2015-04-05
Acceptance date: 2016-02-25
Online publication date: 2016-03-07
Publication date: 2016-03-01
Acta Mechanica et Automatica 2016;10(1):62-65
KEYWORDS
ABSTRACT
The paper presents a comparison of the fatigue life curves based on test of 15Mo3 steel under cyclic, pendulum bending and tension-compression. These studies were analyzed in terms of a large and small number of cycles where strain amplitude is dependent on the fatigue life. It has been shown that commonly used Manson-Coffin-Basquin model cannot be used for tests under cyclic bending due to the impossibility of separating elastic and plastic strains. For this purpose, some well-known models of Langer and Kandil and one new model of authors, where strain amplitude is dependent on the number of cycles, were proposed. Comparing the results of bending with tension-compression it was shown that for smaller strain amplitudes the fatigue life for both test methods were similar, for higher strain amplitudes fatigue life for bending tests was greater than for tension-compression.
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| ISSN: | 1898-4088 |
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