A Comprehensive Creep Model

Abstract

/npsi/ctrl?lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?lang=fr Access and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur.Transactions of the ASME. Journal of Basic Engineering, 89, Series D, 3, pp. 496-502, 1967-07-01 A comprehensive creep model Harmathy, T. Z.

Development of a high temperature material model for grade s275jr steel

“…The difference between the authors' study and the latter is that the stressstrain curves from Kirby and Preston were determined by means of transient coupon tests heated at 10°C/min on the now-superseded steel Grade 43A with an ambient-temperature yield strength of approximately 267 MPa, which is close to the yield strength of the tested grade. Results from studies by Harmathy [16,19], and the corresponding creep model, Table 4. It can be seen that the studied alloy has a carbon content similar to the others, with the exception of Brnić's study [9] which used steel with a lower carbon content.…”

A unified rheological model for modelling steel behaviour in fire conditions

“…Harmathy's creep model [24] has proved sufficiently accurate in previous studies [21,22,23] In which T R is the temperature (K), R is the universal gas constant (J/molK), H is the creep activation energy (J/mol), Z is the Zener-Hollomon parameter (h -1 ),  cr,0 is a dimensionless creep parameter, t represents time and represents temperature-compensated time. In order to utilize the creep model, the material parameters Z, H/R and  cr,0 are borrowed from a research study conducted by Harmathy and Stanzak [25] for American steel Grade A36, whose yield strength is similar to Eurocode steel Grade S275.…”

Design to Cope with Fully Developed Fires

“…Based on a comprehensive model for the creep of metals at elevated temperatures [90,91], this author described a numerical technique for the calculation of the stress-deformation history and estimation of the point of structural failure of protected steel trusses and truss-like constructions [92]. The deflection and failure of protected steel beams in fire was later discussed by Thor [93.94] and this author [95].…”