期刊
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
卷 51, 期 4, 页码 305-313出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijmecsci.2009.02.004
关键词
Single crystal plasticity; Tertiary creep; Damage modelling; Evolution strategy; Finite element technology
资金
- German Research Foundation (DFG) [1057/5-1]
This paper focuses on the modelling of primary, secondary and tertiary creep of nickel-base single crystal superalloys at high temperatures. In particular, we propose an extension of the Cailletaud single crystal plasticity model [Meric L, Poubanne P, Cailletaud G. Single crystal modeling for structural calculations: part 1-model presentation. Transactions of the ASME 1991;133:162-170] to include tertiary creep. This is achieved by introducing an additional evolution equation for a scalar damage variable per slip system. In addition, a methodology for the calibration of the material parameters of the model to fit the results from experiments has been implemented. The parameter identification rests upon a two-membered evolution strategy. The comparison with uniaxial and multiaxial test data shows a good agreement between model and experiment. The structural simulations have been performed by means of a special element technology which enables efficient and accurate finite element computations. (c) 2009 Elsevier Ltd. All rights reserved.
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