scholarly journals Identifying the stress–strain curve of materials by microimpact testing. Application on pure copper, pure iron, and aluminum alloy 6061-T651

2015 ◽  
Vol 30 (14) ◽  
pp. 2222-2230 ◽  
Author(s):  
Halim Al Baida ◽  
Cécile Langlade ◽  
Guillaume Kermouche ◽  
Ricardo Rafael Ambriz
Keyword(s):  
Aluminum Alloy ◽  
Pure Iron ◽  
Pure Copper ◽  
Strain Curve ◽  
Stress Strain Curve ◽  
Stress Strain ◽  
Aluminum Alloy 6061 ◽  
Image Position ◽  
Alloy 6061

Abstract

Stress-strain curve measurements of aluminum alloy and carbon steel by unconstrained-type high-pressure torsion testing

2017 ◽  
Vol 122 ◽  
pp. 226-235 ◽  
Author(s):  
Yasuhiro Yogo ◽  
Masatoshi Sawamura ◽  
Noritoshi Iwata ◽  
Nobuki Yukawa
Keyword(s):  
High Pressure ◽  
Aluminum Alloy ◽  
Carbon Steel ◽  
High Pressure Torsion ◽  
Strain Curve ◽  
Stress Strain Curve ◽  
Stress Strain ◽  
Torsion Testing

scholarly journals A stress-strain curve for the atomic lattice of mild steel in compression

1942 ◽  
Vol 181 (984) ◽  
pp. 72-83 ◽  
Keyword(s):  
Mild Steel ◽  
Yield Point ◽  
Applied Stress ◽  
Pure Iron ◽  
Lattice Strain ◽  
Strain Curve ◽  
Partial Recovery ◽  
Stress Strain Curve ◽  
Stress Strain ◽  
Atomic Lattice

A stress-strain curve has been obtained for the atomic lattice of mild steel subjected to compression. A set of atomic planes is selected of which the spacing is practically perpendicular to the direction of the stress, and the change in spacing is measured as the magnitude of the applied stress is systematically varied. The behaviour of the lattice is compared with the corresponding stress-strain relation for the external dimensions in the compression test, and also with the lattice stress-strain curve previously obtained for the same material when subjected to tensile stress. Other experiments are described on the behaviour of the lattice of pure iron in compression. It had been previously shown that at the external yield in tension, the atomic spacing exhibited an abrupt change which remained indefinitely on removal of the stress; the effect was interpreted as a lattice yield point. The present work establishes that the lattice possesses a yield point also in compression, again marking the onset of a permanent lattice strain. The direction of this strain, however, is opposite to that found in tension, and the magnitude increases systematically with the applied stress. The experiments on the pure iron show that under extreme deformation the permanent lattice strain tends to a limit and that with continued deformation partial recovery from the strain may occur. The results suggest that the mechanics of the metallic lattice involve the principle that, after the lattice yield point, in a given direction the lattice systematically assumes a permanent strain in such a sense as to oppose the elastic strain induced by the applied stress.

Stress-Strain Behavior of an Aluminum Alloy Under Transient Strain-Rates

2011 ◽  
Vol 133 (4) ◽  
Author(s):  
Y. W. Kwon ◽  
Y. Esmaeili ◽  
C. M. Park
Keyword(s):  
Aluminum Alloy ◽  
Strain Rate ◽  
Fracture Strain ◽  
Strain Curve ◽  
Strain Rates ◽  
Stress Strain Curve ◽  
Stress Strain ◽  
Single Strain ◽  
Transient Strain ◽  
Strain Rate Loading

Because most structures are subjected to transient strain-rate loading, an experimental study was conducted to investigate the stress-strain behaviors of an aluminum alloy undergoing varying strain-rate loading. To this end, uniaxial tensile loading was applied to coupons of dog-bone shape such that each coupon underwent two or three different strain-rates, i.e., one rate after another. As a basis, a series of single-strain-rate tests was also conducted with strain-rates of 0.1–10.0 s−1. When the material experienced multistrain-rate loading, the stress-strain curves were significantly different from any single-strain-rate stress-strain curve. The strain-rate history affected the stress-strain curves under multistrain-rate loading. As a result, some simple averaging of single-strain-rate curves did not predict the actual multistrain-rate stress-strain curve properly. Furthermore, the fracture strain under multistrain-rate loading was significantly different from that under any single-strain-rate case. Depending on the applied strain-rates and their sequences, the former was much greater or less than the latter. A technique was proposed based on the residual plastic strain and plastic energy density in order to predict the fracture strain under multistrain-rate loading. The predicted fracture strains generally agreed well with the experimental data. Another observation that was made was that the unloading stress-strain curve was not affected by the previous strain-rate history.

Estimation of Texture-dependent Stress－Strain Curve and r-value of Aluminum Alloy Sheet Using Deep Learning

2020 ◽  
Vol 61 (709) ◽  
pp. 48-55
Author(s):  
Kohta KOENUMA ◽  
Akinori YAMANAKA ◽  
Ikumu WATANABE ◽  
Toshihiko KUWABARA
Keyword(s):  
Aluminum Alloy ◽  
Deep Learning ◽  
Strain Curve ◽  
Alloy Sheet ◽  
Aluminum Alloy Sheet ◽  
Stress Strain Curve ◽  
Stress Strain

scholarly journals Estimation of Texture-Dependent Stress-Strain Curve and r-Value of Aluminum Alloy Sheet Using Deep Learning

2020 ◽  
Vol 61 (12) ◽  
pp. 2276-2283 ◽  
Author(s):  
Kohta Koenuma ◽  
Akinori Yamanaka ◽  
Ikumu Watanabe ◽  
Toshihiko Kuwabara
Keyword(s):  
Aluminum Alloy ◽  
Deep Learning ◽  
Strain Curve ◽  
Alloy Sheet ◽  
Aluminum Alloy Sheet ◽  
Stress Strain Curve ◽  
Stress Strain

The Research of Aluminum Alloy Honeycomb Sandwich Panel Mechanical Properties in Out-Plane Compression Test

2012 ◽  
Vol 450-451 ◽  
pp. 252-256
Author(s):  
Jin Ping Hu
Keyword(s):  
Aluminum Alloy ◽  
Sandwich Panel ◽  
Split Hopkinson Pressure Bar ◽  
Deformation Behaviour ◽  
Strain Curve ◽  
Average Stress ◽  
Stress Strain Curve ◽  
Stress Strain ◽  
Honeycomb Sandwich ◽  
Aluminum Alloy Honeycomb

This paper first studied aluminum alloy honeycomb sandwich panel in out- plane static compress test.Through analyzing deformation characteristics, the loads-displacement relationship was obtained and are described by the average stress-strain curve. Secondly, using the Split Hopkinson Pressure Bar device of impact test, deformation behaviour，dynamic average stress-strain curve data and so on were got under different loading rates, thus learned impact dynamics characteristics of that.

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