scholarly journals Influence of the strain dependent material behaviour under plane strain on the yield locus modelling

2021 ◽  
Vol 1157 (1) ◽  
pp. 012062
Author(s):  
M Lenzen ◽  
M Merklein
Keyword(s):  
Plane Strain ◽  
Yield Locus ◽  
Material Behaviour ◽  
Strain Dependent

A Method to Determine the Plane-Strain Yield Locus for Ductile Crystals

1996 ◽  
Vol 63 (2) ◽  
pp. 327-330
Author(s):  
R. R. Nikolic
Keyword(s):  
Linear Programming ◽  
Limit Theorem ◽  
Lower Bound ◽  
Plane Strain ◽  
Yield Surface ◽  
Yield Locus ◽  
New Method ◽  
Stress Space ◽  
Theory Of Plasticity ◽  
Optimization Routine

This paper presents a new method for determining the plane-strain yield surfaces based on the application of the lower bound limit theorem of the theory of plasticity. The method is very simple and by use of linear programming optimization routine the points of the yield surface in the stress space are generated automatically.

The Use of Notched Beams to Establish a Multiaxial Stress-Fracture Criterion for Beryllium

1982 ◽  
Vol 104 (3) ◽  
pp. 200-206 ◽  
Author(s):  
R. A. Mayville ◽  
I. Finnie
Keyword(s):  
Plane Strain ◽  
Stress Fracture ◽  
Fracture Criterion ◽  
Maximum Tensile Stress ◽  
Test Results ◽  
The Past ◽  
Notched Specimens ◽  
Four Point Bending ◽  
Strain Fracture ◽  
Strain Dependent

Fracture of beryllium under biaxial states of stress has been studied in the past using thin-walled tubes loaded by combinations of axial load, torsion, and internal pressure. In the present investigation to obtain a triaxial state of stress, notched beams of beryllium with varying dimensions were tested in plane strain four-point bending. The conditions necessary to ensure plane strain are discussed in detail and plane strain finite element analyses are used to determine the stresses and strains at fracture in the notched specimens. Based on the test results a strain dependent, maximum tensile stress fracture criterion is proposed for parts without macroscopic cracks. In addition, the plane strain fracture toughness of beryllium is estimated from the notched bar tests using the RKR model.

Mouse paternal-RNAs initiate pattern of metabolic disorders in a strain dependent manner

2016 ◽  
Author(s):  
Guzide Satir Basaran ◽  
Yagut Akbarova ◽  
Kezban Korkmaz ◽  
Kursad Unluhizarci ◽  
Francois Cuzin ◽  
...  
Keyword(s):  
Metabolic Disorders ◽  
Dependent Manner ◽  
Strain Dependent

Atomistic Simulation Study of Controlled Nanostructure Patterning

2003 ◽  
Vol 775 ◽  
Author(s):  
Byeongchan Lee ◽  
Kyeongjae Cho
Keyword(s):  
Diffusion Barrier ◽  
Atomistic Simulation ◽  
Degrees Of Freedom ◽  
Embedded Atom Method ◽  
Surface Kinetics ◽  
Bulk Properties ◽  
Embedded Atom ◽  
Kinetics Of ◽  
Dissociation Barrier ◽  
Strain Dependent

AbstractWe investigate the surface kinetics of Pt using the extended embedded-atom method, an extension of the embedded-atom method with additional degrees of freedom to include the nonbulk data from lower-coordinated systems as well as the bulk properties. The surface energies of the clean Pt (111) and Pt (100) surfaces are found to be 0.13 eV and 0.147 eV respectively, in excellent agreement with experiment. The Pt on Pt (111) adatom diffusion barrier is found to be 0.38 eV and predicted to be strongly strain-dependent, indicating that, in the compressive domain, adatoms are unstable and the diffusion barrier is lower; the nucleation occurs in the tensile domain. In addition, the dissociation barrier from the dimer configuration is found to be 0.82 eV. Therefore, we expect that atoms, once coalesced, are unlikely to dissociate into single adatoms. This essentially tells that by changing the applied strain, we can control the patterning of nanostructures on the metal surface.

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