Development of a Novel Plastic Hardening Model Based on Random Tree Growth Method
| Autor: | Hyoung-Seo Son, Young-Gon Kim, Jin-Jae Kim, Young-Suk Kim |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Binary tree Astrophysics::High Energy Astrophysical Phenomena 020502 materials Metals and Alloys 02 engineering and technology 021001 nanoscience & nanotechnology Surfaces Coatings and Films Electronic Optical and Magnetic Materials 0205 materials engineering Modeling and Simulation Random tree Curve fitting Hardening (metallurgy) Applied mathematics 0210 nano-technology |
| Zdroj: | Korean Journal of Metals and Materials. 58:741-751 |
| ISSN: | 2288-8241 1738-8228 |
| Popis: | The flow functions for plastic deformation have been developed to describe the plastic behavior of sheet metals. In order to explain the plastic behavior of material in metal forming processes via finite element analyses, two basic input functions should be applied. One is the yield function that determines the yielding behavior. The other is flow function to describe the hardening property of sheet metal. To describe the hardening properties of sheet materials under quasi-static tension condition in a wide range of plastic straining, various different equations are known such as classical Swift, Voce, Holloman, combined Swift-Voce, and recently proposed Kim-Tuan equations, etc. Those hardening equations are based on metallurgical or phenomenological investigations, and however the application of each equation has some limitation. In this study, the random growth of the binary tree method is introduced to develop the reliable hardening equations of various sheet metals (i.e. DP980, Pure Ti, AA5052-O, STS304, Ti-Gr2, and Mg-AZ31B) with no knowledge of existing hardening equation types. To evaluate the proposed method, the proposed equations developed by new approach are compared with the Voce, Swift, and Kim-Tuan hardening equations for stress-strain curve and the plastic instability point. Consequently, the proposed approach was proven to be very efficient to find the reliable and accurate hardening equation for any kind of materials. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|