A practical constitutive theory based on egg-shaped function in elasto-plastic modeling for soft clay
| Autor: | Jian-lin Yu, Jian-she Qin, Ri-qing Xu, Zhi-jian Qiu, Xiao-bo Zhan, Jia-qi Jiang |
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| Rok vydání: | 2020 |
| Předmět: |
Constitutive theory
State parameter Mathematical analysis Isotropy 0211 other engineering and technologies Metals and Alloys General Engineering Elasto plastic 02 engineering and technology Stress (mechanics) 020303 mechanical engineering & transports 0203 mechanical engineering Soft clay Hardening (metallurgy) 021101 geological & geomatics engineering Test data Mathematics |
| Zdroj: | Journal of Central South University. 27:2424-2439 |
| ISSN: | 2227-5223 2095-2899 |
| DOI: | 10.1007/s11771-020-4459-y |
| Popis: | An exploratory discussion is presented on the application of egg-shaped function in elasto-plastic constitutive analysis for soft clay. Two main tasks of the paper are: 1) to propose a complete yield criterion based on egg-shaped function and supplement its definition in the deviatoric section, and then a yield criterion suitable for 3D stress conditions is obtained; 2) to elaborate its numerical implementation based on the drained triaxial tests. During the above discussion, a non-associated flow rule is proposed, in which the stress-dilatancy relationship in most classical theory is replaced by a linear dependence between the stress state parameter η and the rotation angle η of the plastic potential surface. Thereafter, isotropic and kinematic hardening behavior is considered by employing the hardening parameter H, which can be expressed as the function of plastic work Wp. Finally, comparisons between numerical results and test data on Taizhou soft clay are made to verify the effectiveness of the proposed model. |
| Databáze: | OpenAIRE |
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