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

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

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.

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 Initial stress-strain state of the Yugo-Zapadnaya mine lower horizons (the Darasunsky deposit)

2019 ◽  
Vol 42 (3) ◽  
pp. 324-335
Author(s):  
Arkady Avdeev ◽  
◽  
Elena Sosnovskaya ◽  
Alexander Bolotnev ◽  
◽  
...  
Keyword(s):  
Initial Stress ◽  
Strain State ◽  
Stress Strain ◽  
Stress Strain State

scholarly journals The Effect of Residual Stresses on the Strain Evolution during Welding of Thin-Walled Tubes

2011 ◽  
Vol 473 ◽  
pp. 298-303 ◽  
Author(s):  
Maarten De Strycker ◽  
Wim Van Paepegem ◽  
Luc Schueremans ◽  
Dimitri Debruyne
Keyword(s):  
Residual Stresses ◽  
Production Process ◽  
Initial Stress ◽  
Strain State ◽  
Thermal Strain ◽  
Welding Process ◽  
Experimental Setup ◽  
Stress Strain ◽  
Strain Evolution ◽  
Stress Strain State

In many applications, negative effects of residual stresses in the material stemming from the production process, are regularly encountered. These residual stresses in cold-rolled steel tubes are mainly due to two mechanisms: (i) the rolling of the flat plate into a circular cross-section and (ii) afterwards closing this section with a weld bead. This research focuses on the residual stresses due to the welding process. In an experimental setup abstraction is made of the real production process of the tube. A finite element model is built of this experimental setup. Validation of the welding simulations is done by comparing the strain evolution in both the experiment and the simulation. In this validation process, sometimes a discrepancy between the measured strain evolution and the one obtained from the numerical analysis is seen. In this contribution it is numerically investigated how initial residual stresses affect the thermal strain evolution in the tube during the welding process. This is done in two ways: firstly an initial stress field in hoop direction, based on the spring back of the tube when cut is taken as the reference state and secondly the stress/strain state after the first weld is used in stead of the virgin material state. The conclusion for both assumptions is that the strain evolution during the welding is affected by the initial stress/strain state of the material.

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