Finite Element Crystal Plasticity Analysis on Slip Deformation in α-Ti Single Crystal with Ushaped Notch.

2018 ◽  
Vol 2018 (0) ◽  
pp. OS1424
Author(s):  
Yelm OKUYAMA ◽  
Masaki TANAKA ◽  
Tetsuya OHASHI
Keyword(s):  
Finite Element ◽  
Single Crystal ◽  
Crystal Plasticity ◽  
Slip Deformation

Forming Limit Analysis of Hexagonal Metal Considering Volume Fraction of Deformation Twinning

2019 ◽  
Vol 794 ◽  
pp. 226-231
Author(s):  
Tomoaki Koga ◽  
Yuichi Tadano
Keyword(s):  
Plastic Deformation ◽  
Finite Element ◽  
Crystal Plasticity ◽  
Limit Analysis ◽  
Volume Fraction ◽  
Deformation Twinning ◽  
Forming Limit ◽  
Strain Paths ◽  
Homogenization Scheme ◽  
Slip Deformation

In the plastic deformation of hexagonal metals, deformation twinning plays an important role as well as slip deformation. Therefore, a modelling of deformation twinning is essential in the crystal plasticity modeling. In this study, a model considering the volume fraction of deformation twinning is presented in the framework of crystal plasticity, and it is combined with a finite element-based homogenization scheme to represent the polycrystalline behavior. The presented model is adopted to a sheet necking formulation. Plastic flow behaviors under several strain paths are evaluated using the present framework, and the effect of volume fraction of deformation twinning on the formability of hexagonal metal is discussed.

Crystal Plasticity Finite Element Method for Cyclic Behavior of Single Crystal Nickel-Based Superalloy

2021 ◽  
Vol 12 (01) ◽  
pp. 2150002
Author(s):  
Xiaoyu Qin ◽  
Guomin Han ◽  
Shengxu Xia ◽  
Weijie Liu ◽  
De-Ye Lin
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Constitutive Model ◽  
Single Crystal ◽  
Crystal Plasticity ◽  
Constitutive Relationship ◽  
Cyclic Behavior ◽  
Crystal Plasticity Finite Element ◽  
Nickel Based Superalloy ◽  
Element Method

This paper reports the modeling and simulation of cyclic behavior of single crystal nickel-based superalloy by using the crystal plasticity finite element method. Material constitutive model based on the crystal plasticity theory is developed and is implemented in a parallel way as user subroutine modules embedded in the commercial Abaqus[Formula: see text] software. For simplicity in calibration and without loss of generality, the crystal plasticity constitutive relationship used in this work takes the form that only contains a few parameters. The parameters are optimized by using the Powell algorithm. We employ the calibrated constitutive model with the finite element solver on a cuboid and a blade to simulate cyclic and anisotropic properties of single crystal superalloy. Results show that the predicted stress–strain curves are in good agreement with the experimental measurements, and anisotropic results are presented in both elastic and plastic regions.

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