Deakin University
Browse

File(s) under permanent embargo

Effect of mean stress on multiaxial ratcheting life: a simplified life prediction model based on average equivalent stress amplitude

Version 2 2024-06-03, 12:33
Version 1 2015-09-07, 12:22
journal contribution
posted on 2024-06-03, 12:33 authored by SK Paul, Tim HilditchTim Hilditch
This article proposes a model to predict uniaxial and multiaxial ratcheting life by addressing the three primary parameters that influence failure life: fatigue damage, ratcheting damage and the multiaxial loading path. These three factors are addressed in the present model by (a) the stress amplitude for fatigue damage, (b) mean stress-dependent Goodman equation for ratcheting damage and (c) an inherent weight factor based on average equivalent stress to account for the multiaxial loading. The proposed model requires only two material constants which can be easily determined from uniaxial symmetric stress-controlled fatigue tests. Experimental ratcheting life data collected from the literature for 1025 and 42CrMo steel under multiaxial proportional and nonproportional constant amplitude loading ratcheting with triangular sinusoidal and trapezoidal waveform (i.e. linear, rhombic, circular, elliptical and square stress paths) have shown good agreement with the proposed model.

History

Journal

Journal of strain analysis for engineering design

Volume

50

Pagination

366-372

Location

Thousand Oaks, Calif.

ISSN

0309-3247

eISSN

2041-3130

Language

eng

Publication classification

C Journal article, C1 Refereed article in a scholarly journal

Copyright notice

2015, SAGE Publications

Issue

6

Publisher

SAGE Publications