Finite Element Model for Plymouth Tub Processing Using Internal State Variables

Cho, H., Horstemeyer, M., Hammi, Y., & Francis, D.K. (2015). Finite Element Model for Plymouth Tub Processing Using Internal State Variables. Proceedings of the 3rd World Congress on Integrated Computational Materials Engineering (ICME). Colorado Springs, CO: John Wiley & Sons.

Abstract

The complete manufacturing process of cold drawn welded steel tubing was simulated using a history dependent internal state variable plasticity-damage model. In order to implement the history dependent model, the Internal State Variables (ISV) Plasticity-Damage (DMG) model that has been developed at Sandia National Labs and Mississippi State University was employed for a low carbon steel AISI 1010, which is the alloy used by the partnering tube manufacturing company. Even though the model is performed at the structural scale, the history variables (internal state variables) which are driven by microstructural changes—e.g., dislocation density and grain size—were tracked through the whole sequences, and the history model captured real thermal and mechanical behaviors of the target material. Once the internal state variables were extracted from the simulation, the model showed critical deformation histories that one could not notice with the naked eye, and must therefore be considered for future design of the tubing process.