Dynamic elastic‐plastic properties of single‐crystal pentaerythritol tetranitrate

1976 ◽  
Vol 47 (3) ◽  
pp. 976-982 ◽  
Author(s):  
P. M. Halleck ◽  
Jerry Wackerle
Keyword(s):  
Single Crystal ◽  
Pentaerythritol Tetranitrate ◽  
Plastic Properties ◽  
Elastic Plastic

Elastic-plastic behaviour of polycrystalline metals and composites

1970 ◽  
Vol 319 (1537) ◽  
pp. 247-272 ◽  
Keyword(s):  
Tensile Stress ◽  
Single Crystal ◽  
Elastic Anisotropy ◽  
Stress Strain ◽  
Plastic Properties ◽  
Cubic Crystals ◽  
Elastic Plastic ◽  
Polycrystalline Metals ◽  
Strain Behaviour ◽  
Self Consistent

Stress-strain behaviour of polycrystals and composites is explored with self-consistent models based on the elastic-plastic properties of the single crystal constituents. Based on Hill’s (1965 a ) model, tensile stress-strain curves and the associated yield surfaces are calculated for polycrystals and composites comprised of face-centred cubic crystals. Single crystal elastic anisotropy and strain hardening are taken into account. Stress-strain behaviour at a corner of the yield surface is determined with the model proposed by Kröner (1961) and Budiansky & Wu (1962).

scholarly journals Finite Pure Plane Strain Bending of Inhomogeneous Anisotropic Sheets

Symmetry ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 145
Author(s):  
Sergei Alexandrov ◽  
Elena Lyamina ◽  
Yeong-Maw Hwang
Keyword(s):  
Plane Strain ◽  
Yield Criterion ◽  
Large Strains ◽  
Rigid Plastic ◽  
Plastic Properties ◽  
Elastic Plastic ◽  
Starting Point ◽  
The Difference ◽  
Inside Radius ◽  
Elastic Unloading

The present paper concerns the general solution for finite plane strain pure bending of incompressible, orthotropic sheets. In contrast to available solutions, the new solution is valid for inhomogeneous distributions of plastic properties. The solution is semi-analytic. A numerical treatment is only necessary for solving transcendent equations and evaluating ordinary integrals. The solution’s starting point is a transformation between Eulerian and Lagrangian coordinates that is valid for a wide class of constitutive equations. The symmetric distribution relative to the center line of the sheet is separately treated where it is advantageous. It is shown that this type of symmetry simplifies the solution. Hill’s quadratic yield criterion is adopted. Both elastic/plastic and rigid/plastic solutions are derived. Elastic unloading is also considered, and it is shown that reverse plastic yielding occurs at a relatively large inside radius. An illustrative example uses real experimental data. The distribution of plastic properties is symmetric in this example. It is shown that the difference between the elastic/plastic and rigid/plastic solutions is negligible, except at the very beginning of the process. However, the rigid/plastic solution is much simpler and, therefore, can be recommended for practical use at large strains, including calculating the residual stresses.

Determining Elastic-Plastic Properties of Al6061-T6 from Micro-Indentation Technique

2013 ◽  
Vol 592-593 ◽  
pp. 610-613
Author(s):  
Sina Amiri ◽  
Nora Lecis ◽  
Andrea Manes ◽  
Davide Mombelli ◽  
Marco Giglio
Keyword(s):  
Manufacturing Process ◽  
Optimization Procedure ◽  
Test System ◽  
Standard Test ◽  
Material Behavior ◽  
Plastic Properties ◽  
Representative Strain ◽  
Elastic Plastic ◽  
Dimensionless Analysis ◽  
Micro Indentation

Different approaches have been proposed in order to determine the material behavior of ductile materials. Since, the mechanical properties of a mechanical component are modified during manufacturing process due to plastic deformation, heat treatment and etc, a non-destructive indentation experimental procedure addressed to predict the elastic-plastic properties of material after manufacturing process is of interest. This is especially true for small size components where it is complex to extract specimens to test on standard test system. Based on dimensionless analysis and the concept of a representative strain, different approaches have been proposed to determine the material properties of power law materials by using indentation process. In this work, the Johnson-Cook (JC) constitutive model of the aluminum alloy Al6061-T6 is characterized by means of a well-defined optimization procedure based on micro-indentation testing and high fidelity finite element models and an optimization procedure but without the concept of dimensionless analysis and a representative strain. This methodology allows determining a set of JC constants for Al6061-T6. The obtained results have good agreement with parameters calibrated by means of universal standard tests and reverse engineering approach.

Evaluation of elastic, elastic-plastic properties of thin Pt wire by mechanical bending test

2010 ◽  
Vol 103 (2) ◽  
pp. 493-496 ◽  
Author(s):  
S. K. Deb Nath ◽  
Hironori Tohmyoh ◽  
M. A. Salam Akanda
Keyword(s):  
Bending Test ◽  
Plastic Properties ◽  
Elastic Plastic ◽  
Mechanical Bending

Influence of alloying systems on the properties of single crystal nickel-based superalloys

2021 ◽  
Vol 112 (10) ◽  
pp. 794-799
Author(s):  
Alexander Glotka ◽  
Vadim Ol’shanetskii
Keyword(s):  
Single Crystal ◽  
Regression Models ◽  
Strength Properties ◽  
Term Limits ◽  
Alloying Elements ◽  
Structure Stability ◽  
Plastic Properties ◽  
Crystal Lattices ◽  
Predictive Regression ◽  
First Time

Abstract The purpose of the investigation was to obtain the predictive regression models that help correct the calculation of the mechanical properties of single crystal nickel-based superalloys without conducting prior experiments. The paper considers the influence of alloying elements on their tendency to form phases in foundry nickel-based superalloys. Using the elements influence on the phase formation, the coefficient Kc’ of the ratio of alloying elements for this class of alloys was set for the first time. We have revealed the short correlation of the ratio Kc’ with the dimensional misfit of γ and γ’ crystal lattices. Also, a high probability to predict the misfit for multicomponent nickel systems is shown, which significantly affected the strength properties. The regression models of correlation dependencies on the dimensional γ/γ’- misfit were offered to predict the short-term and long-term limits of the strength of alloys. We determined the operating temperature at which the misfit value should decrease to zero. The structure stability should increase because of the structural stresses minimizing. This has a positive effect on strength and plastic properties.

The influence of the Sc3+ dopant on the transmittance of (Y, Er)3Al5O12 ceramics

2021 ◽  
Author(s):  
Elena Dobretsova ◽  
Vadim Zhmykhov ◽  
Sergey Kuznetsov ◽  
Irina Chikulina ◽  
Marina Nikova ◽  
...  
Keyword(s):  
Optical Transmittance ◽  
Plastic Properties ◽  
Elastic Plastic

The substitution of Al3+ with the larger Sc3+ in the Er:YSAG structure leads to improved elastic–plastic properties. The optical transmittance of the ceramics is affected strongly by including Sc3+ and is increased to up to 60% at about 1.5 μm.

scholarly journals Gradient Elastic–Plastic Properties of Expanded Austenite Layer in 316L Stainless Steel

2018 ◽  
Vol 31 (8) ◽  
pp. 831-841 ◽  
Author(s):  
Yong Jiang ◽  
Yang Li ◽  
Yun-Fei Jia ◽  
Xian-Cheng Zhang ◽  
Jian-Ming Gong
Keyword(s):  
Stainless Steel ◽  
316L Stainless Steel ◽  
Plastic Properties ◽  
Elastic Plastic ◽  
Expanded Austenite
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