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Volume 7, Issue 10 (November 2010)
The Influence of Elastic Follow-Up on the Integrity of Structures
(Received 5 September 2009; accepted 9 September 2010)
Published Online: 04 October 2010
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Based on the traditional definitions associated with creep strain accumulation in defect free components, a generalised definition for “elastic follow-up” factor, , is proposed that characterises the influence of a “nonlinear” event experienced locally within a structure, i.e., creep, plasticity, cracking, growth of an existing crack, or any combination of such events, on the response of the structure to the applied loading. A “crack affected zone” approach is then outlined for evaluation of this parameter in a defective component. The significance of quantifying elastic follow-up in relation to integrity assessment procedures and the challenges facing its practical implication to the codes is discussed. The approach is finally examined through its application to two example problems; a standard test geometry, centre cracked plate and an external circumferential cracked thick cylinder, i.e., a conventional structural component.
Mechanical Engineering Dept., Ferdowsi Univ. of Mashhad, Univ. Campus,
Smith, D. J.
Mechanical Engineering Dept., Queen's Building, Univ. of Bristol,
Stock #: JAI102703
Title The Influence of Elastic Follow-Up on the Integrity of Structures