Cyclic Tests of Smooth and Notched Specimens Subjected to Bending and Torsion Taking into Account the Effect of Mean Stress

The paper contains the results of fatigue tests of smooth and notched specimens made of 10HNAP (S355J2G1W) subjected to proportional cyclic loading with use of mean values stress. The results obtained for specimens under bending, torsion and one combination of bending with torsion for four mean valu...

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Main Authors:	Roland Pawliczek, Dariusz Rozumek
Format:	Article
Language:	English
Published:	MDPI AG 2020-05-01
Series:	Materials
Subjects:	mean stress fatigue life multiaxial stress bending torsion
Online Access:	https://www.mdpi.com/1996-1944/13/9/2141

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spelling	doaj-4332b6e7b37946178f53b2fdfcc1b17f2020-11-25T03:26:44ZengMDPI AGMaterials1996-19442020-05-01132141214110.3390/ma13092141Cyclic Tests of Smooth and Notched Specimens Subjected to Bending and Torsion Taking into Account the Effect of Mean StressRoland Pawliczek0Dariusz Rozumek1Department of Mechanics and Machine Design, Opole University of Technology, 45-271 Opole, PolandDepartment of Mechanics and Machine Design, Opole University of Technology, 45-271 Opole, PolandThe paper contains the results of fatigue tests of smooth and notched specimens made of 10HNAP (S355J2G1W) subjected to proportional cyclic loading with use of mean values stress. The results obtained for specimens under bending, torsion and one combination of bending with torsion for four mean values have been compared. The experimental data have been collected in the tables and shown in the figures with use of various σ<sub>a</sub>(τ<sub>a</sub>)-N fatigue characteristics for which parameters of the regression equations have been determined. The influence of average values on the allowable stress amplitudes and amplitude of moments at the level close to the fatigue limit depending on the angle α determining loading combination and the average stress is also shown. The greatest effect of the notch on fatigue life compared to smooth specimens is observed at symmetrical loads. At unsymmetrical loads with non-zero mean stress, this effect clearly weakens or disappears.https://www.mdpi.com/1996-1944/13/9/2141mean stressfatigue lifemultiaxial stressbendingtorsion
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Roland Pawliczek Dariusz Rozumek
spellingShingle	Roland Pawliczek Dariusz Rozumek Cyclic Tests of Smooth and Notched Specimens Subjected to Bending and Torsion Taking into Account the Effect of Mean Stress Materials mean stress fatigue life multiaxial stress bending torsion
author_facet	Roland Pawliczek Dariusz Rozumek
author_sort	Roland Pawliczek
title	Cyclic Tests of Smooth and Notched Specimens Subjected to Bending and Torsion Taking into Account the Effect of Mean Stress
title_short	Cyclic Tests of Smooth and Notched Specimens Subjected to Bending and Torsion Taking into Account the Effect of Mean Stress
title_full	Cyclic Tests of Smooth and Notched Specimens Subjected to Bending and Torsion Taking into Account the Effect of Mean Stress
title_fullStr	Cyclic Tests of Smooth and Notched Specimens Subjected to Bending and Torsion Taking into Account the Effect of Mean Stress
title_full_unstemmed	Cyclic Tests of Smooth and Notched Specimens Subjected to Bending and Torsion Taking into Account the Effect of Mean Stress
title_sort	cyclic tests of smooth and notched specimens subjected to bending and torsion taking into account the effect of mean stress
publisher	MDPI AG
series	Materials
issn	1996-1944
publishDate	2020-05-01
description	The paper contains the results of fatigue tests of smooth and notched specimens made of 10HNAP (S355J2G1W) subjected to proportional cyclic loading with use of mean values stress. The results obtained for specimens under bending, torsion and one combination of bending with torsion for four mean values have been compared. The experimental data have been collected in the tables and shown in the figures with use of various σ<sub>a</sub>(τ<sub>a</sub>)-N fatigue characteristics for which parameters of the regression equations have been determined. The influence of average values on the allowable stress amplitudes and amplitude of moments at the level close to the fatigue limit depending on the angle α determining loading combination and the average stress is also shown. The greatest effect of the notch on fatigue life compared to smooth specimens is observed at symmetrical loads. At unsymmetrical loads with non-zero mean stress, this effect clearly weakens or disappears.
topic	mean stress fatigue life multiaxial stress bending torsion
url	https://www.mdpi.com/1996-1944/13/9/2141
work_keys_str_mv	AT rolandpawliczek cyclictestsofsmoothandnotchedspecimenssubjectedtobendingandtorsiontakingintoaccounttheeffectofmeanstress AT dariuszrozumek cyclictestsofsmoothandnotchedspecimenssubjectedtobendingandtorsiontakingintoaccounttheeffectofmeanstress
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Cyclic Tests of Smooth and Notched Specimens Subjected to Bending and Torsion Taking into Account the Effect of Mean Stress

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