Seminar & Colloquium
[세미나: 4월 12일(금), 오전 10시] Prof. Park, Taejoon, The Ohio State University
Title
The crystal yield function in the rate-independent crystal plasticity model and its effect on the anisotropy evolution
Speaker
Prof. Park, Taejoon, The Ohio State University
* Education
- 2006. 2. BS., Materials Science and Engineering, Seoul National University
- 2013. 8. Ph.D., Materials Science and Engineering, Seoul National University
* Experience
- 2013 ~ 2015 Postdoctoral researcher, Michigan State University, East Lansing, Michigan, UnitedStates
- 2015 ~ 2017 Postdoctoral researcher, The Ohio State University, Columbus, Ohio, United States
- 2017 ~ 2023 Senior Research Associate-Engineer, The Ohio State University, Columbus, Ohio, United States
- 2023 ~ present Research Associate Professor, The Ohio State University, Columbus, Ohio, United States
| Date | Friday April 12th , 2024
| Time | 9:00 ~
| Venue | 온라인(https://snu-ac-kr.zoom.us/j/83682927259?pwd=NPxB2cVhXRNBJKjNvzt3U3nnbJiR45.1)
[Abstract]
In the typical crystal plasticity framework, the constitutive models for slip deformation are commonly described by the rate-dependent formulation, which helps to avoid the non-uniqueness of activated slip systems due to the interdependency of the slip systems. However, these rate-dependent models can be computationally expensive as these models impose numerically stiff and highly non-linear equations that need to be solved at every integration point. Alternatively, the rate-independent crystal plasticity model uses the crystal yield function to describe the slip deformation and plastic spin by the active slip systems without encountering the non-uniqueness problem.
In this seminar, the effect of nonlinearity between resolved shear stress and slip rate on the shape of the crystal yield function in the formulation of the rate-independent crystal plasticity will be investigated. In addition to the effects of the crystal plasticity model, the influence of the nonlinearity of the single crystal yield function on the evolution of anisotropy will be explored for various polycrystalline materials.
| Host | 이명규 교수(02-880-1711)