Multiaxial ratcheting modeling with incorporation of a yield surface distortion model
| Autor: | Ali Nayebi, H. Rokhgireh |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Imagination
Engineering Chemical substance Operations research business.industry Yield surface Mechanical Engineering media_common.quotation_subject 02 engineering and technology Mechanics 021001 nanoscience & nanotechnology Convexity Stress (mechanics) Nonlinear system 020303 mechanical engineering & transports 0203 mechanical engineering Distortion 0210 nano-technology business Triangular function media_common |
| Zdroj: | Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science. 231:979-994 |
| ISSN: | 2041-2983 0954-4062 |
| DOI: | 10.1177/0954406216634747 |
| Popis: | Correct determination of ratcheting strain is very important in cyclic loading. A new simple yield surface distortion model is presented and its effect on cyclic loading and ratcheting prediction is investigated in this research. Model of Baltov and Sawczuk was modified in order to be able to consider directional distortion of the yield surface. Movement of the yield surface center is modeled by Chaboche's nonlinear kinematic hardening model. Isotropic hardening was also considered. A triangular function is used and necessary cyclic plasticity relations are developed. Convexity of the proposed model is discussed and verified. Performance of the proposed model in ratcheting strain prediction is investigated in multiaxial non proportional loadings under different paths. Experimental results with stress, strain and combined stress-strain control paths are compared with the proposed model results. Incorporation of the yield surface distortion of this new model, predicts better ratcheting strain for different stress, strain and stress-strain paths. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|