119 Computational Simulation of Deformation Behavior of Microscopic Unit Cell Embedded Elliptic Martensite in TRIP Steel and Comparison of Micromechanics

2000 ◽  
Vol 005.1 (0) ◽  
pp. 37-38
Author(s):  
Hiroki TAKAHASHI ◽  
Takeshi IWAMOTO ◽  
Toshio TSUTA
Keyword(s):  
Trip Steel ◽  
Deformation Behavior ◽  
Computational Simulation ◽  
Unit Cell

A Computational Simulation of Martensitic Transformation in Polycrystal TRIP Steel by Crystal Plasticity FEM with Voronoi Tessellation

2019 ◽  
Vol 794 ◽  
pp. 71-77 ◽  
Author(s):  
Truong Duc Trinh ◽  
Takeshi Iwamoto
Keyword(s):  
Grain Size ◽  
Martensitic Transformation ◽  
Crystal Plasticity ◽  
Trip Steel ◽  
Deformation Behavior ◽  
Voronoi Tessellation ◽  
Computational Simulation ◽  
High Strength ◽  
Transformation Strain ◽  
Kinetics Modelling

TRIP steel shows excellent mechanical properties such as greatly high strength, ductility and toughness by means of the appropriate combination of the strain-induced martensitic transformation (SIMT) behavior and the deformation behavior of each phase at crystal scale. In the past, the effect of grain size in the austenite on the deformation behavior of TRIP steel is investigated by introducing the grain size into a generalized model for the kinetics of SIMT. In order to validate the size-dependent kinetics modelling, it is necessary to simulate the deformation and SIMT behavior of the polycrystalline for the different grain size at the crystal scale. This study focuses on an investigation of SIMT behavior in polycrystalline TRIP steel by finite element simulation. The constitutive formula for monocrystalline TRIP steel including transformation strain in each variant system derived on the basis of the continuum crystal plasticity theory is applied. For the polycrystalline model, Voronoi tessellation is employed. The deformation behavior with a patterning process of martensitic phase in two different numbers of grains with initial crystal orientations for describing the deformation-related length scale is simulated under plane strain condition with two planar slip systems by a cellular automata approach.

Mesoscopic Modeling of Deformation Behavior of Semi-Crystalline Polymer

2005 ◽  
Vol 297-300 ◽  
pp. 2915-2921
Author(s):  
M. Uchida ◽  
Yoshihiro Tomita
Keyword(s):  
Deformation Behavior ◽  
Tensile Deformation ◽  
Cell Model ◽  
Computational Simulation ◽  
Crystalline Polymer ◽  
Homogenization Method ◽  
Unit Cell ◽  
Semicrystalline Polymer ◽  
Amorphous Phases ◽  
Tension And Compression

In present study, we clarify the micro- to mesoscopic deformation behavior of semicrystalline polymer unit cell by using large deformation finite element homogenization method. Crystalline plasticity theory with penalty method for enforcing the inextensibility of chain direction and nonaffine molecular chain network theory were applied to the representation of the deformation behavior of crystalline and amorphous phases, respectively, in composite microstructure of semicrystalline polymer. The different directional tension and compression are applied to the 2- dimensional plane strain semi-crystalline unit cell model. A series of computational simulation clarified highly anisotropic deformation behavior of microstructure of semi-crystalline polymer, which is caused by rotation of chain direction and lamella interface, and manifests as a substantial hardening/softening. This anisotropy for tensile deformation is higher than that for compressive deformation.

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