Constitutive Modeling of Metallic Material Considering the Effect of Grain Direction and Strain Rates for Structural FEM Application

14:00:00

16:00:00

Bandung

ITB

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This meeting is conducted to report some progress related to the research topic in the development of material constitutive model. By this meeting, the current information is flowed and shared between the MIT mentor, and ITB.

The current information of the research progress has been successfully shared. The grain direction effect has been inserted into current constitutive model as the target from the previous meeting using Hill's 48 anisotropy yield criteria and combined (isotropic-kinematic) hardening model. Some inputs for next stage of research work is arranged between the MIT mentor and ITB.

Implementation of the constitutive model that has been derived theoretically into numerical model is the next challenge. Besides, adding the strain rates effect into current constitutive model will be the other challenge. Some experimental works should be started to prepare as emphirical data and validation that will be used in the numerical model.

Making the subroutine code in Fortran programming language that linked to VUMAT ABAQUS. Simple loading cases will be the initial stage to test the code that has been established, like using one element test with axial loading, etc. After this stage, more complex cases can be gradually conducted, like cup drawing test. The anisotropy effect can be evaluated through half cup drawing test simulation.

Developing the subroutine code in VUMAT ABAQUS needs both teoretical and computational understanding. Some systematic test must be conducted to test the validaity of code that has been developed. Case complexity must be gradually increased to test the model. By this way, every stage can be evaluated comprehensively so that the validity of model can be guaranteed.

Numerical model using VUMAT ABAQUS for anisotrpy effect that has been developed will be tested using some cases with gradual complexity level. Besides, strain rates effect will start to insert in the model so that the effect of both anisotropy and strain rates can be evaluated. This process will be guided by the MIT mentor along with ITB and University of Oxford.

Virtual (Online)

 

 

 

Rizal Heri, Zaky Salman, Reza Fadhil, Rudi Qais, Dafa Noor