Ratcheting of 316L stainless steel thin wire under tension-torsion loading

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Ratcheting of 316L stainless steel thin wire under tension-torsion loading

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Fu, Sichao / Yu, Dunji / Chen, Xu

A series of cyclic tension-torsion tests under symmetric shear strain and asymmetric axial stress control in various loading paths are conducted on 100 ?m-diameter 316L steel wires applying a micro tensiontorsion fatigue testing apparatus. The ratcheting strain of the thin wire increases with increasing axial mean stress and decreases in a sequence of linear, rhombic and circular paths. The macro-scale based cyclic plastic constitutive models with kinematic hardening rules of the Ohno-Wang (OW) and the Chen-Jiao-Kim (C-J-K) are evaluated for the thin wire. Comparing with the O-W, the C-J-K predicts more accurately under high axial stress. While the loading path effects on ratcheting for wire specimens are basically simulated, the macro-based models tend to under-estimate the effect of phase difference between axial and torsional loadings and the ratcheting evolution in the initial 50 cycles.

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Title :

Ratcheting of 316L stainless steel thin wire under tension-torsion loading

Contributors:

Fu, Sichao (author) / Yu, Dunji (author) / Chen, Xu (author)

Publication date :

2016-10-03

Remarks:

Frattura ed Integrità Strutturale; Vol. 10 No. 38 (2016): October 2016; Pages 141-147 ; Frattura ed Integrità Strutturale; V. 10 N. 38 (2016): October 2016; Pages 141-147 ; 1971-8993

Type of media :

Article (Journal)

Type of material :

Electronic Resource

Language :

English

Keywords :

Thin wire , Tension-torsion , Ratcheting , 316L stainless steel

Classification :

DDC:

621 / 629