Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4923395 | Journal of Constructional Steel Research | 2017 | 8 Pages |
Abstract
The paper presents test results for the mechanical and creep properties of the European steel grade S275JR at high temperatures. The objective of the research was to obtain a reliable estimate of creep strain development in the temperature range 400-600 °C, and to identify the critical thermo-mechanical parameters which activate the creep mechanism. Tests of mechanical properties at temperature levels up to 600 °C have shown good agreement with the reduction factors for yield strength and modulus of elasticity given in Eurocode 3 and other comparable studies. A critical temperature for creep development of approximately 400 °C was identified in the tests. The creep tests conducted have also shown that the creep strain rate starts to develop significantly at temperatures around 500 °C when coupons are exposed to a mid-range stress level equal to 60% of the stress at 0.2% strain. The temperature level of 600 °C is identified as the upper-bound temperature for creep development, since creep develops very rapidly, even at very low stress levels. Finally, the paper presents an analytical creep model suitable for implementation in Finite Element-based numerical models.
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Authors
Neno ToriÄ, Josip BrniÄ, Ivica Boko, Marino BrÄiÄ, Ian W. Burgess, Ivana Uzelac GlaviniÄ,