scholarly journals Evaluation of local stress state due to grain-boundary sliding during creep within a crystal plasticity finite element multi-scale framework

2021 ◽  
pp. 106715
Author(s):  
Markian P. Petkov ◽  
Elsiddig Elmukashfi ◽  
Edmund Tarleton ◽  
Alan C.F. Cocks
Keyword(s):  
Finite Element ◽  
Stress State ◽  
Grain Boundary ◽  
Crystal Plasticity ◽  
Local Stress ◽  
Grain Boundary Sliding ◽  
Crystal Plasticity Finite Element ◽  
Multi Scale ◽  
Local Stress State ◽  
Boundary Sliding

scholarly journals Incompatibility Stresses and Lattice Rotations Due to Grain Boundary Sliding in Heterogeneous Anisotropic Elasticity

2017 ◽  
Author(s):  
Thiebaud Richeton
Keyword(s):  
Finite Element ◽  
Grain Boundary ◽  
Triple Line ◽  
Grain Boundary Sliding ◽  
Boundary Plane ◽  
Lattice Rotation ◽  
Interface Plane ◽  
Grain Boundary Plane ◽  
Analytic Expressions ◽  
Boundary Sliding

Non-uniform grain boundary sliding can induce strain and rotation incompatibilities at perfectly planar interfaces. Explicit analytic expressions of stress and lattice rotation jumps are thus derived at a planar interface in the general framework of heterogeneous anisotropic thermo-elasticity with plasticity and grain boundary sliding. Both elastic fields are directly dependent on in-plane gradients of grain boundary sliding. It is also shown that grain boundary sliding is a mechanism that may relax incompatibility stresses of elastic, plastic and thermal origin although the latter are not resolved on the grain boundary plane. This relaxation may be a driving force for grain boundary sliding in addition to the traditionally considered local shears on the grain boundary plane. Moreover, the obtained analytic expressions are checked by different kinds of bicrystal shearing finite element simulations allowing grain boundary sliding and where a pinned line in the interface plane aims at representing the effect of a triple junction. A very good agreement is found between the analytic solutions and the finite element results. The performed simulations particularly emphasize the role of grain boundary sliding as a possible strong stress generator around the grain boundary close to the triple line because of the presence of pronounced gradients of sliding.

Multi-Scale Thermo-Crystal Plasticity Finite Element Evaluation of Recrystallization Texture

2016 ◽  
Vol 2016 (0) ◽  
pp. OS08-16
Author(s):  
Yuhei UEDA ◽  
Toshihiko YAMAGUCHI ◽  
Yoshihiro TOMITA ◽  
Yusuke MORITA ◽  
Eiji NAKAMACHI
Keyword(s):  
Finite Element ◽  
Crystal Plasticity ◽  
Recrystallization Texture ◽  
Crystal Plasticity Finite Element ◽  
Multi Scale

Modeling of TWIP Steel Tensile Behavior with Crystal Plasticity Finite Element Method

2014 ◽  
Vol 926-930 ◽  
pp. 162-165
Author(s):  
Yuan Yuan Wang ◽  
Xin Sun ◽  
Yan Dong Wang ◽  
Xiao Hua Hu ◽  
Hussein M. Zbib
Keyword(s):  
Finite Element ◽  
Stress Concentration ◽  
Crystal Plasticity ◽  
Twip Steel ◽  
Volume Fraction ◽  
Local Stress ◽  
Mechanical Twinning ◽  
Tensile Behavior ◽  
Deformation Condition ◽  
Crystal Plasticity Finite Element

We developed a plane-strain crystal plasticity finite element (CPFE) numerical model to predict the tensile behavior of twinning-induced plasticity (TWIP) steel with both slip and mechanical twinning as the main deformation modes. Our CPFE model may not only predict well the tensile stress versus strain (S-S) curve but also capture the variation in the volume fraction of twins with a reasonable accuracy. The nucleation of mechanical twin is obviously controlled by the stress concentration. At the same time, the growth of twin may either lead to a stress relaxation in the matrix or cause a local stress concentration around twin, which depends on the deformation condition.

Sign in / Sign up

Export Citation Format

Share Document