Abstract
Design and residual life estimates of electrical power plant components operating in the creep range are generally based on stress-rupture data derived from simple, constant load, uniaxial tests. However, in service the majority of components are subject to complex stresses which vary with both position in the structure and time. Rigorous evaluation of these service situations would require complex computer analyses using finite element techniques, together with extensive multiaxial creep rate and rupture data. At present it is possible to establish the stress distributions for components that have a relatively simple geometry. Therefore the concept has been introduced of a representative rupture stress which is simply the stress that would rupture the multiaxially stressed component in the same time as a uniaxially stressed creep specimen. Since this can be established only empirically either full scale tests need to be carried out or the multiaxial creep deformation and rupture response of the particular material must be established.
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© 1986 Elsevier Applied Science Publishers Ltd
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Lonsdale, D., Flewitt, P.E.J. (1986). Multiaxial Creep Testing Using Uniaxially Loaded Specimens with a Superimposed Hydrostatic Pressure. In: Gooch, D.J., How, I.M. (eds) Techniques for Multiaxial Creep Testing. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-3415-3_13
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DOI: https://doi.org/10.1007/978-94-009-3415-3_13
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