scholarly journals Transient Network at Large Deformations: Elastic–Plastic Transition and Necking Instability

Polymers ◽  
2016 ◽  
Vol 8 (4) ◽  
pp. 108 ◽  
Author(s):  
Fanlong Meng ◽  
Eugene Terentjev
Keyword(s):  
Large Deformations ◽  
Elastic Plastic ◽  
Transient Network

scholarly journals A Solution of Rigid Perfectly Plastic Cylindrical Indentation in Plane Strain and Comparison to Elastic-Plastic Finite Element Predictions With Hardening

2017 ◽  
Vol 85 (2) ◽  
Author(s):  
Robert L. Jackson
Keyword(s):  
Plastic Deformation ◽  
Finite Element ◽  
Large Deformations ◽  
Contact Radius ◽  
Flat Surfaces ◽  
Elastic Plastic ◽  
Perfectly Plastic ◽  
Effective Yield ◽  
Line Theory ◽  
Steel Properties

The indentation of flat surfaces deforming in the plastic regime by various geometries has been well studied. However, there is relatively little work investigating cylinders indenting plastically deforming surfaces. This work presents a simple solution to a cylindrical rigid frictionless punch indenting a half-space considering only perfectly plastic deformation. This is achieved using an adjusted slip line theory. In addition, volume conservation, pileup and sink-in are neglected, but the model can be corrected to account for it. The results agree very well with elastic-plastic finite element predictions for an example using typical steel properties. The agreement does diminish for very large deformations but is still within 5% at a contact radius to cylinder radius ratio of 0.78. A method to account for strain hardening is also proposed by using an effective yield strength.

Nonlinear Plastic Modeling of Materials Based on the Generalized Strain Rate Tensor

2008 ◽  
Author(s):  
Kamyar Ghavam ◽  
Reza Naghdabadi
Keyword(s):  
Strain Rate ◽  
Simple Shear ◽  
Large Deformations ◽  
Kinematic Hardening ◽  
Flow Rule ◽  
Strain Rate Tensor ◽  
Governing Equations ◽  
Elastic Plastic ◽  
Shear Problem ◽  
Plastic Hardening

In this paper, a method for modeling of elastic-plastic hardening materials under large deformations is proposed. In this model the generalized strain rate tensor is used. Such a tensor is obtained on the basis of the method which was introduced by the authors. Based on the generalized strain rate tensor, a flow rule, a Prager-type kinematic hardening equation and a kinematic decomposition is proposed and the governing equations for such materials are obtained. As an application, the governing equations for the simple shear problem are solved and some results are compared with those in the literature.

Thermo-Elastic-Plastic Constitutive Model for Numerical Analysis of Metallic Structures under Local Impulsive Loadings

2014 ◽  
Vol 566 ◽  
pp. 493-498 ◽  
Author(s):  
Marina Chernobryvko ◽  
Leopold Kruszka ◽  
Yuorii Vorobiev
Keyword(s):  
Strain State ◽  
Dynamic Stress ◽  
Large Deformations ◽  
Dynamic Properties ◽  
Impulsive Loading ◽  
Metallic Structures ◽  
Plastic Deformations ◽  
Elastic Plastic ◽  
Properties Of Materials ◽  
Impulsive Loadings

The tasks of dynamic behavior of constructions’ elements under the impulsive loadings modeling are examined. Mathematical models are taken into account to calculate thermo-elastic-plastic deformations, dynamic properties of materials, large deformations and strains. Numerical calculations of the dynamic stress-strain state for steel constructions are conducted for a local impulsive loading.

An Improved Numerical Calculation Technique for Large Elastic-Plastic Transient Deformations of Thin Shells: Part 2—Evaluation and Applications

1971 ◽  
Vol 38 (2) ◽  
pp. 429-436 ◽  
Author(s):  
L. Morino ◽  
J. W. Leech ◽  
E. A. Witmer
Keyword(s):  
Numerical Calculation ◽  
Computational Efficiency ◽  
Large Deformations ◽  
Thin Shells ◽  
Theoretical Formulation ◽  
Elastic Plastic ◽  
Calculation Technique ◽  
Good Agreement

Based upon the theoretical formulation presented in Part 1 of this paper, improvements in accuracy and computational efficiency are realized. Comparisons of predictions with experimental transient large deformations and strains show good agreement.

scholarly journals Thermo elasto-plastic contact analysis for high temperature applications

2021 ◽  
pp. 276-276
Author(s):  
Samir Danouni ◽  
Abd Zamree ◽  
El-Hadj Abdellah ◽  
Saad Mat
Keyword(s):  
High Temperature ◽  
Contact Problem ◽  
Mechanical Model ◽  
Large Deformations ◽  
Numerical Models ◽  
Computational Results ◽  
Structural Components ◽  
Plastic Deformations ◽  
Elastic Plastic ◽  
Plane Plate

This study presents the development of a thermo-mechanical simulation model for an elastic-plastic contact problem between a half cylinder and a plane plate. The set of equations was solved using direct coupling method by Ansys mechanical. The results obtained from the present numerical model of the structural contact without heat transfer are compared with those of analytical, experimental and other numerical models. Then, the contact problem was solved using a coupled thermo-mechanical model. Computational results showed significant effects of thermal consideration in the elastic-plastic contact problem. Large deformations of structure due to high temperature are predicted using the thermo-mechanical model with elastic-plastic deformations. This model is useful to predict deformations on the structural components due to contact at high temperature situation.

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