Comparative study on mechanical behavior of low temperature application materials for ships and offshore structures: Part II – Constitutive model
| Autor: | Min-Sung Chun, Chi-Seung Lee, Woong-Sup Park, Jae-Myung Lee, Myung-Hyun Kim |
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| Rok vydání: | 2011 |
| Předmět: |
Materials science
business.industry Mechanical Engineering Constitutive equation Alloy technology industry and agriculture chemistry.chemical_element Structural engineering Mechanics Atmospheric temperature range engineering.material Condensed Matter Physics Finite element method Nonlinear system Nickel chemistry Mechanics of Materials engineering Hardening (metallurgy) General Materials Science Austenitic stainless steel business |
| Zdroj: | Materials Science and Engineering: A. 528:7560-7569 |
| ISSN: | 0921-5093 |
| DOI: | 10.1016/j.msea.2011.06.040 |
| Popis: | Austenitic stainless steel (ASS), aluminum alloy, and nickel steel alloy are strong temperature- and strain-rate-dependent materials. They exhibit very complicated nonlinear behaviors during plastic deformation. While the typical characteristics of their nonlinear behaviors, including second hardening and strain-rate sensitivity, can be easily identified through experimental investigation, a useful numerical model is not available. The unavailability of such a model is because of the wide variance in the nonlinearities of the materials. In the present study, a unified constitutive model is proposed for representing the temperature- and strain-rate-dependent material nonlinearities in ASS and aluminum and nickel steel alloys. Based on the Bodner model, a strain-hardening function was developed for expressing second hardening as well as strain-rate sensitivity. To provide unified material parameters for the hardening exponent and strain-rate control, a new type of material parameter identification method is proposed. Based on the proposed constitutive model, in conjunction with both a damage model and the material parameters, a verification study is conducted. The experimental results of both Park et al. [1] and Tomita and Iwamoto [2] , which are valid within a temperature range of 80–345 K and a strain-rate range of 0.0005–500/s, are compared with the numerical results of this study. |
| Databáze: | OpenAIRE |
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