Skip to content

Measurement of elastic follow-up for combined applied and residual stresses

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Original languageEnglish
Title of host publicationAmerican Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
Volume5
DOIs
DatePublished - 2013
EventASME 2013 Pressure Vessels and Piping Conference, PVP 2013 - Paris, France
Duration: 14 Jul 201318 Jul 2013

Conference

ConferenceASME 2013 Pressure Vessels and Piping Conference, PVP 2013
CountryFrance
CityParis
Period14/07/1318/07/13

Abstract

Tensile residual stress can reduce the load carrying capability of a structure. However, residual stresses may be redistributed during the life of a component by, for example, permanent deformation. This paper explains an experiment carried out to understand how applied and residual stresses interact and to seek a method of measuring elastic follow-up during the interaction. A friction stir welded aluminium alloy plate was subjected to a series of incrementally increasing load and unload cycles, whilst simultaneously measuring residual stresses and deformation. In-situ loading of the specimen during the residual stress measurements allowed the relaxation of the residual stress to be quantified. The elastic follow-up has been estimated and measured by considering both the structural stiffnesses of the specimen and the relaxation of the residual stress. It was found that global yielding, which can result in no net change of incompatibility, has to be considered when calculating elastic follow-up. An estimation of the elastic follow-up factor based on the structural stiffnesses of the specimen was found to be non-conservative and an elastic follow-up factor of 2.9 was measured. That is three times as much plastic strain is required to relax the residual stress when compared to the fixed-displacement case.

    Research areas

  • Elastic follow-up, Experiment, Primary and secondary stress, Rate of relaxation of residual stress

Event

ASME 2013 Pressure Vessels and Piping Conference, PVP 2013

Duration14 Jul 201318 Jul 2013
CityParis
CountryFrance
SponsorsPressure Vessels and Piping Division (External organisation), Nondestructive Evaluation Engineering Division (External organisation)

Event: Conference

Documents

DOI

View research connections

Related faculties, schools or groups