Stability and well-posedness of a rate-dependent strain-softening plasticity model

2010 ◽  
Vol 1 (3) ◽  
pp. 195 ◽  
Author(s):  
Q.H. Zuo ◽  
D.J. Alldredge
Keyword(s):  
Strain Softening ◽  
Well Posedness ◽  
Plasticity Model ◽  
Rate Dependent ◽  
Dependent Strain

In situ measurement of rate-dependent strain/stress evolution and mechanism exploration in graphene electrodes during electrochemical process

Carbon ◽  
2019 ◽  
Vol 144 ◽  
pp. 342-350 ◽  
Author(s):  
Haimei Xie ◽  
Haibin Song ◽  
Jian-gang Guo ◽  
Yilan Kang ◽  
Wei Yang ◽  
...  
Keyword(s):  
Electrochemical Process ◽  
In Situ Measurement ◽  
Stress Evolution ◽  
Rate Dependent ◽  
Dependent Strain ◽  
Strain Stress

An incremental-update formulation to simulate earing behaviour with crystal plasticity model

2011 ◽  
Vol 225 (8) ◽  
pp. 1774-1781 ◽  
Author(s):  
S Zhang ◽  
S Huang ◽  
D Li ◽  
Y Peng
Keyword(s):  
Crystal Plasticity ◽  
Deformation Behaviour ◽  
Az31 Alloy ◽  
Alloy Sheet ◽  
Plasticity Model ◽  
Explicit Finite Element ◽  
Rate Dependent ◽  
Crystal Plasticity Model ◽  
Finite Element Package ◽  
Incremental Update

To gain a better understanding about the influence of initial texture on deformation behaviour of sheet metals, an incremental-update formulation is adopted for implementing rate-dependent crystal plasticity model into the explicit finite element package, ABAQUS/Explicit. In this formulation, the configuration in the last increment serves as a reference frame, and the stress, grain orientation and hardening behaviour of crystal are updated at the end of each increment. Two user subroutines VUMAT are developed, respectively, for face-centred cubic and hexagonal close packed alloys due to different deformation mechanisms. Earing behaviours of aluminium sheet and AZ31 alloy sheet are simulated for model validation.

Analysis of Influences of Weak Joints and Confining Pressure on Rock Mass Strength by Numerical Simulation

2013 ◽  
Vol 438-439 ◽  
pp. 607-611 ◽  
Author(s):  
Da Hai Wang ◽  
Hao Ran Guo ◽  
Hui Zhao ◽  
Yan Wei Guo
Keyword(s):  
Numerical Simulation ◽  
Rock Mass ◽  
Plastic Zone ◽  
Influencing Factors ◽  
Rock Strength ◽  
Strain Softening ◽  
Confining Pressure ◽  
Plasticity Model ◽  
Rock Mass Strength

Principal influencing factors of the strength of rock mass with weak joints were studied in this paper. Dip angles of weak joints in addition with the confining pressure is studied based on strain-softening/hardening plasticity model. The broken mechanism from the perspective of plastic zone was analyzed. The strength of rock mass with weak joints is mainly under control of the joints occurrence, the joints dip and the rock strength, and great influenced by the confining pressure. A higher strength is obtained with a higher confining pressure, the broken mechanisms varies with different joints dips.

Bifurcation Analyses of Steel and Concrete with Rate-Dependent Properties Part One: Model Formulation and Verification

2002 ◽  
Vol 4 (4) ◽  
pp. 217-224
Author(s):  
Yuxing Liu ◽  
Luming Shen ◽  
Zhen Chen
Keyword(s):  
Damage Model ◽  
Three Dimensional ◽  
Plain Concrete ◽  
Environmental Engineering ◽  
Material Failure ◽  
Plasticity Model ◽  
Model Formulation ◽  
University Of Missouri ◽  
Rate Dependent ◽  
Elasto Plasticity

Department of Civil and Environmental Engineering, University of Missouri-Columbia, Columbia MO 65211–2200, U.S.A. The effects of strain rate on the mechanical properties of carbon steel and plain concrete are investigated through a rate-dependent elasto-plasticity model and rate-dependent elasto-damage model, respectively. Continuum tangent stiffness tensors are derived for both models so that bifurcation analyses can be performed to identify the onset of material failure. Three-dimensional constitutive model solvers are designed and the numerical results are compared with the experimental data to verify the proposed models.

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