Numerical methods for stress intensity factor ΔK calculations of fretting cracked interface

Numerical methods for stress intensity factor ΔK calculations of fretting cracked interface Plain fretting experiments generate cracks under partial slip conditions. The maximum projected crack length (bp) related to the fretting crack achieved after a certain number of cycles is measured and the corresponding stress intensity factor range ΔK is computed.This work compares several methods for computing ΔK: a classic approach using McEwen's distribution, an indirect method using FE simulation and weight functions (decoupled approach), and complete FE simulations using Rice's integrals (coupled approach). The decoupled approach is faster than the coupled one and gives conservative results for long cracks whereas for shorter cracks and for a better approximation, the coupled approach is more relevant.The present study is limited to plain fretting cylinder (Ti-6Al-4V)/flat (Al-7050-T7451) configuration in partial slip. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Tribology International Elsevier

Numerical methods for stress intensity factor ΔK calculations of fretting cracked interface

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Publisher
Elsevier
Copyright
Copyright © 2017 Elsevier Ltd
ISSN
0301-679X
eISSN
1879-2464
D.O.I.
10.1016/j.triboint.2017.10.029
Publisher site
See Article on Publisher Site

Abstract

Plain fretting experiments generate cracks under partial slip conditions. The maximum projected crack length (bp) related to the fretting crack achieved after a certain number of cycles is measured and the corresponding stress intensity factor range ΔK is computed.This work compares several methods for computing ΔK: a classic approach using McEwen's distribution, an indirect method using FE simulation and weight functions (decoupled approach), and complete FE simulations using Rice's integrals (coupled approach). The decoupled approach is faster than the coupled one and gives conservative results for long cracks whereas for shorter cracks and for a better approximation, the coupled approach is more relevant.The present study is limited to plain fretting cylinder (Ti-6Al-4V)/flat (Al-7050-T7451) configuration in partial slip.

Journal

Tribology InternationalElsevier

Published: Mar 1, 2018

References

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