Effect of experimental pre-stress and residual stress on modal behaviour

NAJ Lieven, PD Greening

Research output: Contribution to journalArticle (Academic Journal)

15 Citations (Scopus)

Abstract

Considerable research effort has been expended demonstrating the existence of variability in dynamic response characteristics of nominally identical structures. It is accepted that, however precisely the tolerances are defined for the finished product, the method by which these are achieved vary from one component to the next. It is inevitable that residual stresses within the component will arise and correspond to the severity of the manufacturing process. In addition, poorly defined tolerances will lead to lack of fit in redundant structures, causing geometry and stress-stiffening alterations due to the internal loads. The work presented in this paper considers the development of residual and prestresses in two simple structures under laboratory conditions. The residual stresses are introduced to the material through standard manufacturing processes. By the use of annealing the influences of the local stresses are identified. The source of variability due to the annealing process is compared with inconsistencies introduced by the measuring process. The second example considers the dynamic influence of introducing known loads within a redundant frame structure. The likely effects of imposed pre-stress and work hardening of structures during their working life are discussed.
Translated title of the contributionEffect of experimental pre-stress and residual stress on modal behaviour
Original languageEnglish
Pages (from-to)97 - 111
Number of pages16
JournalPhilosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
Volume359 (1778)
DOIs
Publication statusPublished - Jan 2001

Bibliographical note

Publisher: The Royal Society

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