The University of Southampton
University of Southampton Institutional Repository

Fatigue-life predictions including the effects of hold time and multiaxial loads on crack-coalescence behaviour

Fatigue-life predictions including the effects of hold time and multiaxial loads on crack-coalescence behaviour
Fatigue-life predictions including the effects of hold time and multiaxial loads on crack-coalescence behaviour
Two aspects of crack-coalescence behavior are reported. The first concerns a regime frequently referred to in the literature as creep-fatigue interactions but which in this paper is essentially a time-dependent, fatigue-failure process. The second relates to crack coalescence under a wide range of different multiaxial stress-strain states. In the framework of the first approach, a fatigue-crack growth model is derived based on experimental observations during high-temperature, high-strain, reversed-bend, hold-time tests on AISI 316 stainless steel. Essential features of these tests are the compressive and the tensile 60-min hold periods on different surfaces, which induce, respectively, transgranular-short and intergranular-long cracks. The latter, more damaging cracks involve the coalescence of numerous short cracks to form a dominant Stage II crack that leads to failure. Then, in the framework of the second approach, the crack-coalescence model is advanced to predict the fatigue lifetimes for multiaxial, variable amplitude, proportional loading of a medium carbon steel commonly used to manufacture engineering components. It is shown that under high strain fatigue conditions the models used for the calculations of lifetime must necessarily involve crack-coalescence behavior if unsafe lifetime predictions are to be avoided
0039-2316
502-516
Brown, M.W.
390a5a4a-bd65-4dc2-b5f3-a6411839a014
Gao, N.
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Miller, K. J.
d417e456-3b18-4998-9b5d-d508fd223b9c
Brown, M.W.
390a5a4a-bd65-4dc2-b5f3-a6411839a014
Gao, N.
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Miller, K. J.
d417e456-3b18-4998-9b5d-d508fd223b9c

Brown, M.W., Gao, N. and Miller, K. J. (2000) Fatigue-life predictions including the effects of hold time and multiaxial loads on crack-coalescence behaviour. Strength of Materials, 32 (6), 502-516. (doi:10.1023/A:1005200314976).

Record type: Article

Abstract

Two aspects of crack-coalescence behavior are reported. The first concerns a regime frequently referred to in the literature as creep-fatigue interactions but which in this paper is essentially a time-dependent, fatigue-failure process. The second relates to crack coalescence under a wide range of different multiaxial stress-strain states. In the framework of the first approach, a fatigue-crack growth model is derived based on experimental observations during high-temperature, high-strain, reversed-bend, hold-time tests on AISI 316 stainless steel. Essential features of these tests are the compressive and the tensile 60-min hold periods on different surfaces, which induce, respectively, transgranular-short and intergranular-long cracks. The latter, more damaging cracks involve the coalescence of numerous short cracks to form a dominant Stage II crack that leads to failure. Then, in the framework of the second approach, the crack-coalescence model is advanced to predict the fatigue lifetimes for multiaxial, variable amplitude, proportional loading of a medium carbon steel commonly used to manufacture engineering components. It is shown that under high strain fatigue conditions the models used for the calculations of lifetime must necessarily involve crack-coalescence behavior if unsafe lifetime predictions are to be avoided

Full text not available from this repository.

More information

Published date: 2000

Identifiers

Local EPrints ID: 22943
URI: http://eprints.soton.ac.uk/id/eprint/22943
ISSN: 0039-2316
PURE UUID: f9435911-162e-4e6b-a272-038c75520500

Catalogue record

Date deposited: 06 Feb 2007
Last modified: 15 Jul 2019 19:21

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×