The performance of selected multiaxial criteria under tension/torsion loading conditions. (June 2020)

• Record Type: Journal Article
• Authors: Chmelko, Vladimír; Margetin, Matúš
• Is Part Of: International journal of fatigue. Volume 135(2020)
• Publication Date: 2020-06
• Subjects: Fatigue -- Multiaxial criteria -- Tension/torsion loading -- Experimental results; Materials -- Fatigue -- Periodicals; Materials -- Fatigue; Periodicals; 620.1122
• DOI: 10.1016/j.ijfatigue.2020.105532
• Languages: English
• ISSNs: 0142-1123

Abstract

Highlights: Experimental results of tension/torsional cyclic tests of two steels. Unusual fatigue properties of steel C55 (σc-1 /τc-1 ratio close to or less than 1). The definition of the critical plane as the maximum shear stress plane may not be sufficient. Taking into account failure mode in existing multiaxial criterion may extend their applicability. Abstract: Dependencies σa = f(Nf ) and τa = f(Nf ) were experimentally obtained for two steels with different material properties. Specimens of these materials were exposed to multiple tensile and torsional proportional stress combinations. In the present paper, the experimentally obtained fatigue lifetime values are compared with fatigue lifetime estimations calculated by means of selected criteria, namely those of Findley, McDiarmid, Dang Van, Carpinteri-Spagnoli, and Margetin-Ďurka-Chmelko. The results for steel with a high ratio of Rm/Re are different from the results of the second material. The analysis of the results shows the need to take into account the failure mode in the multiaxial fatigue criteria.