Comparison of constitutive relationships of tubular materials based on incremental theory and total strain theory

The elastic-plasticity of the titanium alloy material has certain effect on the stability of the milling system. When the material is incompressible, the curve and the simple tensile curve are the same, and the material’s curve and the one-way shear’s curve are also the same. This may be called single curve theory. This paper is, under simple loading conditions, gets the data in the titanium alloy’s tensile experiment and torsion experiment. It studies the constitutive relation in the state of the multidimensional stress and the strain, by the material data obtained in the simple tensile experiment and torsion experiment according to the single curve theory. In the simple loading condition, it obtains the data of the titanium alloy’s tensile experiment and torsion experiment, and then gets the titanium alloy’s incremental constitutive relation, and by integration, it gets the constitutive relation of the titanium alloy’s total strain theory.

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Identification of plastic stress-strain parameters by global digital image correlation, the virtual fields method and the total strain theory

Mechanical Engineering Journal ◽

10.1299/mej.16-00106 ◽

2016 ◽

Vol 3 (6) ◽

pp. 16-00106-16-00106

Author(s):

Shun HAMADA ◽

Keita JINNO ◽

Shuichi ARIKAWA ◽

Satoru YONEYAMA

Keyword(s):

Digital Image Correlation ◽

Digital Image ◽

Strain Theory ◽

Image Correlation ◽

Total Strain ◽

Virtual Fields Method ◽

Stress Strain ◽

Plastic Stress

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2-D Springback Analysis for Stretch-Bending Processes Based on Total Strain Theory

10.4271/950691 ◽

1995 ◽

Cited By ~ 7

Author(s):

Toshihiko Kuwabara ◽

Susumu Takahashi ◽

Kohji Akiyama ◽

Yohsuke Miyashita

Keyword(s):

Strain Theory ◽

Total Strain ◽

Stretch Bending

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Total Strain Theory and Path-Dependence of Concrete

Journal of the Engineering Mechanics Division ◽

10.1061/jmcea3.0002657 ◽

1980 ◽

Vol 106 (6) ◽

pp. 1151-1173

Author(s):

Zdeněk P. Bažant ◽

Tatsuya Tsubaki

Keyword(s):

Path Dependence ◽

Strain Theory ◽

Total Strain

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Approximate estimation of strain-hardening creep deformation

Journal of Strain Analysis ◽

10.1243/03093247v034297 ◽

1968 ◽

Vol 3 (4) ◽

pp. 297-303 ◽

Cited By ~ 3

Author(s):

D L Marriott

Keyword(s):

Exact Solution ◽

Strain Hardening ◽

Approximate Calculation ◽

Strain Theory ◽

Total Strain ◽

Superposition Method ◽

Numerical Examples ◽

Approximate Estimation ◽

The Difference ◽

Creep Deformations

It is demonstrated that creep deformations of a structure based on strain-hardening behaviour are bounded by time-hardening and total-strain solutions. The bounds are not exact, but it is shown that any error is small compared with the difference between the exact solution and the approximate solution when the superposition method (1)∗ is used. As this difference is itself small compared with overall deflections (2) (3), the error due to assuming the strain-hardening solution to be bounded is negligible. It is also shown that strain hardening is asymptotic to the total-strain solution as time increases. A relatively rapid method is suggested for the approximate calculation of deflections, based on an approximate method devised previously (3) for total-strain theory. Numerical examples verify that total-strain theory is a better approximation to strain hardening than is time hardening, especially for large times.

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Testing the Strain Theory of Suicide – The Moderating Role of Social Support

Crisis ◽

10.1027/0227-5910/a000604 ◽

2020 ◽

Vol 41 (2) ◽

pp. 82-88 ◽

Cited By ~ 1

Author(s):

Bob Lew ◽

Ksenia Chistopolskaya ◽

Yanzheng Liu ◽

Mansor Abu Talib ◽

Olga Mitina ◽

...

Keyword(s):

Social Support ◽

Suicidal Behavior ◽

Online Survey ◽

Perceived Social Support ◽

Strain Theory ◽

Cross Sectional Survey ◽

Cross Sectional ◽

Psychological Strains ◽

Moderating Role

Abstract. Background: According to the strain theory of suicide, strains, resulting from conﬂicting and competing pressures in an individual's life, are hypothesized to precede suicide. But social support is an important factor that can mitigate strains and lessen their input in suicidal behavior. Aims: This study was designed to assess the moderating role of social support in the relation between strain and suicidality. Methods: A sample of 1,051 employees were recruited in Beijing, the capital of China, through an online survey. Moderation analysis was performed using SPSS PROCESS Macro. Social support was measured with the Multidimensional Scale of Perceived Social Support, and strains were assessed with the Psychological Strains Scale. Results: Psychological strains are a good predictor of suicidality, and social support, a basic need for each human being, moderates and decreases the effects of psychological strains on suicidality. Limitations: The cross-sectional survey limited the extent to which conclusions about causal relationships can be drawn. Furthermore, the results may not be generalized to the whole of China because of its diversity. Conclusion: Social support has a tendency to mitigate the effects of psychological strains on suicidality.

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Effect of Pre-Tension on the Springback Behavior of the Yellow Brass

Engineering and Technology Journal ◽

10.30684/etj.v38i4a.96 ◽

2020 ◽

Vol 38 (4A) ◽

pp. 552-560

Author(s):

Anwar H. Zabon ◽

Aseel H. Abed

Keyword(s):

Rolling Direction ◽

Total Strain ◽

Deformation Velocity ◽

Constant Deformation ◽

Springback Behavior ◽

Product Study

Springback forecasting of sheet formation is constantly remarkable problem in the métier, due to their influence the great in the definitive shape of the product. Study presents effects of pretension in tow rolling direction (0, 45 degree) on the springback behavior of the (Brass 65-35) sheet under V-die bending by an experimental. The pretension ranges from five different pretensions levels starting from 11% to 55% from total strain in each rolling direction by increment of 11%. used in punching that was performed at a constant deformation velocity of (5 mm/min) then bent on a 90° V-shaped die for the springback evaluation. The results from experiment indicate that the springback increase with pretension ratio and the springback in 45 degree is higher in rolling direction.

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