scholarly journals THE INVESTIGATION OF THE INITIAL STRESS-STRAIN STATE INFLUENCE ON MECHANICAL PROPERTIES OF VISCOELASTIC BODIES

2019 ◽  
Keyword(s):  
Mechanical Properties ◽  
Initial Stress ◽  
Strain State ◽  
Stress Strain ◽  
Stress Strain State ◽  
Viscoelastic Bodies

scholarly journals Studying the effect of elastic-plastic strain and hydrogen sulphide on the magnetic behaviour of pipe steels as applied to their testing

2018 ◽  
Vol 145 ◽  
pp. 05003
Author(s):  
Anna Povolotskaya ◽  
Eduard Gorkunov ◽  
Sergey Zadvorkin ◽  
Igor Veselov
Keyword(s):  
Plastic Strain ◽  
Initial Stress ◽  
Elastic Deformation ◽  
Hydrogen Sulphide ◽  
Strain State ◽  
Pipe Steel ◽  
Magnetic Behaviour ◽  
Pipe Steels ◽  
Stress Strain ◽  
Stress Strain State

The paper reports results of magnetic measurements made on samples of the 12GB pipe steel (strength group X42SS) designed for producing pipes to be used in media with high hydrogen sulphide content, both in the initial state and after exposure to hydrogen sulphide, for 96, 192 and 384 hours under uniaxial elastic-plastic tension. At the stage of elastic deformation there is a unique correlation between the coercive force measured on a minor hysteresis loop in weak fields and tensile stress, which enables this parameter to be used for the evaluation of elastic stresses in pipes made of the 12 GB pipe steel under different conditions, including a hydrogen sulphide containing medium. The effect of the value of preliminary plastic strain, viewed as the initial stress-strain state, on the magnetic behaviour of X70 pipe steels under elastic tension and compression is studied. Plastic strain history affects the magnetic behaviour of the material during subsequent elastic deformation since plastic strain induces various residual stresses, and this necessitates taking into account the initial stress-strain state of products when developing magnetic techniques for the determination of their stress-strain parameters during operation.

Crack Resistance of the Self-Stressed Members Reinforced with FRP Bars

2018 ◽  
Vol 272 ◽  
pp. 244-249 ◽  
Author(s):  
Volha Semianiuk ◽  
Viktar V. Tur
Keyword(s):  
Initial Stress ◽  
Static Loading ◽  
Strain State ◽  
Crack Opening ◽  
The Self ◽  
Stress Strain ◽  
Diagram Method ◽  
Stress Strain State ◽  
Expansion Stage ◽  
Frp Bars

Fiber reinforced polymer (FRP) bars are widely used in building structures, especially that are exposed to the aggressive environment influence and other special conditions. Nevertheless, due to the low FRP (e.g. glass, basalt, aramid fibers reinforced polymers) bars modulus of elasticity, exceeding crack opening width, as well as deflections can be observed. FRP bars pretensioning is considered as an effective method of its structural performance increasing. Physico-chemical method of the FRP bars pretensioning based on the self-stressing concrete utilizing is an alternative to the mechanical method and in its turn doesn’t need for special devices and anchorage systems as well as qualified personnel. Assessment of the initial stress-strain state obtained during self-stressing concrete expansion stage in the reinforced self-stressed members is presented. Diagram method of the self-stressing parameters verification based on the static loading tests results is presented. Comparison of the initial stress-strain state obtained during concrete expansion stage and predicted by the proposed model, as well as assessment of its influence on the behavior at the static loading stage in cases of the self-stressed reinforced with FRP bars members and traditionally reinforced with steel bars self-stressed members was performed.

Bending Process Simulation of a Flat Workpiece with Various Cross-Sectional Mechanical Properties with PAM-STAMP 2G

2016 ◽  
Vol 685 ◽  
pp. 133-136 ◽  
Author(s):  
Fedor Grechnikov ◽  
Yurii Gorshkov ◽  
Yaroslav Erisov
Keyword(s):  
Mechanical Properties ◽  
Heat Affected Zone ◽  
Process Simulation ◽  
Laser Cutting ◽  
Strain State ◽  
Stress Strain ◽  
Cross Sectional ◽  
Stress Strain State ◽  
Bending Process

We have simulated an aluminum workpiece tool bending process with and without consideration of the heat affected zone after laser cutting with PAM-STAMP 2G. To describe the heat affected zone we have used a customized software option for calculating welded materials and dissimilar ones. We have also provided an analysis of the stress-strain state with a different scale of mechanical properties of the material on its “edge” and in the center of the workpiece.

Effect of initial stress/strain state on order-disorder transformation of FePt thin films

2009 ◽  
Vol 94 (23) ◽  
pp. 232505 ◽  
Author(s):  
S. N. Hsiao ◽  
F. T. Yuan ◽  
H. W. Chang ◽  
H. W. Huang ◽  
S. K. Chen ◽  
...  
Keyword(s):  
Thin Films ◽  
Initial Stress ◽  
Strain State ◽  
Stress Strain ◽  
Stress Strain State ◽  
Fept Thin Films

Effect of initial stress/strain state on the L10 phase formation of FePt in FePt/Au/FePt trilayers

2019 ◽  
Vol 10 (8) ◽  
pp. 2775-2780 ◽  
Author(s):  
P. V. Makushko ◽  
M. Yu. Verbytska ◽  
M. N. Shamis ◽  
T. I. Verbytska ◽  
G. Beddies ◽  
...  
Keyword(s):  
Initial Stress ◽  
Phase Formation ◽  
Strain State ◽  
Stress Strain ◽  
Stress Strain State

scholarly journals Effect of initial stress/strain state on formation of (001) preferred orientation inL10FePt thin films

2011 ◽  
Vol 109 (7) ◽  
pp. 07A737 ◽  
Author(s):  
J. K. Mei ◽  
F. T. Yuan ◽  
W. M. Liao ◽  
Y. D. Yao ◽  
H. M. Lin ◽  
...  
Keyword(s):  
Thin Films ◽  
Initial Stress ◽  
Strain State ◽  
Preferred Orientation ◽  
Stress Strain ◽  
Stress Strain State

scholarly journals About One of the Approaches for the Research of the Stress-Strain State of a Flange Connection with a Seal Made of an Alloy with Shape Memory

2022 ◽  
Author(s):  
A. Boikov
Keyword(s):  
Mechanical Properties ◽  
Shape Memory ◽  
Contact Zone ◽  
Axial Compression ◽  
Strain State ◽  
Physical And Mechanical Properties ◽  
Stress Strain ◽  
Flange Connection ◽  
Stress Strain State ◽  
Alternative Approach

Abstract. Design features of a flange connection with a seal made of an alloy with shape memory and the most commonly used methods of researching of the stress-strain state of such connections are estimated. Alternative approach for stress-strain state analysis is proposed, it is based on modeling of the contact zone of the sealing surfaces by means of an equivalent gap between the layers, the value of which changes during axial compression of the multilayer ring and goes into tension. Formulas for determining of contact stresses at the border of layers, which take into consideration the variable physical and mechanical properties of the materials of each layer are presented.

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