{"id":4715,"date":"2021-03-12T14:23:15","date_gmt":"2021-03-12T12:23:15","guid":{"rendered":"http:\/\/journals.khnu.km.ua\/vestnik\/?p=4715"},"modified":"2021-03-16T12:42:55","modified_gmt":"2021-03-16T10:42:55","slug":"%d0%be%d1%81%d0%bd%d0%be%d0%b2%d0%bd%d1%96-%d0%b7%d0%b0%d0%ba%d0%be%d0%bd%d0%be%d0%bc%d1%96%d1%80%d0%bd%d0%be%d1%81%d1%82%d1%96-%d0%b2%d0%bf%d0%bb%d0%b8%d0%b2%d1%83-%d0%bf%d0%b0%d1%80%d0%b0%d0%bc","status":"publish","type":"post","link":"https:\/\/journals.khnu.km.ua\/vestnik\/?p=4715","title":{"rendered":"\u041e\u0441\u043d\u043e\u0432\u043d\u0456 \u0437\u0430\u043a\u043e\u043d\u043e\u043c\u0456\u0440\u043d\u043e\u0441\u0442\u0456 \u0432\u043f\u043b\u0438\u0432\u0443 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u0456\u0432 \u0446\u0438\u043a\u043b\u0456\u0447\u043d\u043e\u0433\u043e \u043d\u0430\u0432\u0430\u043d\u0442\u0430\u0436\u0435\u043d\u043d\u044f \u043d\u0430 \u043c\u043e\u0434\u0443\u043b\u044c \u043f\u0440\u0443\u0436\u043d\u043e\u0441\u0442\u0456 \u0430\u0443\u0441\u0442\u0435\u043d\u0456\u0442\u0443 \u0441\u043f\u043b\u0430\u0432\u0456\u0432 \u0456\u0437 \u043f\u0430\u043c\u2019\u044f\u0442\u0442\u044e \u0444\u043e\u0440\u043c\u0438"},"content":{"rendered":"

<\/p>\n

\u041e\u0421\u041d\u041e\u0412\u041d\u0406 \u0417\u0410\u041a\u041e\u041d\u041e\u041c\u0406\u0420\u041d\u041e\u0421\u0422\u0406 \u0412\u041f\u041b\u0418\u0412\u0423 \u041f\u0410\u0420\u0410\u041c\u0415\u0422\u0420\u0406\u0412 \u0426\u0418\u041a\u041b\u0406\u0427\u041d\u041e\u0413\u041e \u041d\u0410\u0412\u0410\u041d\u0422\u0410\u0416\u0415\u041d\u041d\u042f \u041d\u0410 \u041c\u041e\u0414\u0423\u041b\u042c \u041f\u0420\u0423\u0416\u041d\u041e\u0421\u0422\u0406 \u0410\u0423\u0421\u0422\u0415\u041d\u0406\u0422\u0423 \u0421\u041f\u041b\u0410\u0412\u0406\u0412 \u0406\u0417 \u041f\u0410\u041c\u2019\u042f\u0422\u0422\u042e \u0424\u041e\u0420\u041c\u0418<\/p>\n

MAIN REGULARITIES OF INFLUENCE OF CYCLICIC LOADING PARAMETERS ON THE MODULE OF ELASTICITY AUSTENITE OF SHAPE MEMORY ALLOYS<\/p>\n

\"\"<\/a> \u0421\u0442\u043e\u0440\u0456\u043d\u043a\u0438: 131-135. \u041d\u043e\u043c\u0435\u0440: \u21165, 2020 (289)<\/strong>
\n\u0410\u0432\u0442\u043e\u0440\u0438:<\/strong>
\n\u0412.\u041f. \u042f\u0421\u041d\u0406\u0419
\n\u0422\u0435\u0440\u043d\u043e\u043f\u0456\u043b\u044c\u0441\u044c\u043a\u0438\u0439 \u043d\u0430\u0446\u0456\u043e\u043d\u0430\u043b\u044c\u043d\u0438\u0439 \u0442\u0435\u0445\u043d\u0456\u0447\u043d\u0438\u0439 \u0443\u043d\u0456\u0432\u0435\u0440\u0441\u0438\u0442\u0435\u0442 \u0456\u043c\u0435\u043d\u0456 \u0406\u0432\u0430\u043d\u0430 \u041f\u0443\u043b\u044e\u044f
\nV. IASNII
\nTernopil Ivan Puluj National Technical University
\nDOI:<\/strong> https:\/\/www.doi.org\/10.31891\/2307-5732-2020-289-5-131-135<\/a>
\n\u0420\u0435\u0446\u0435\u043d\u0437\u0456\u044f\/Peer review :<\/strong> 09.11.2020 \u0440.
\n\u041d\u0430\u0434\u0440\u0443\u043a\u043e\u0432\u0430\u043d\u0430\/Printed :<\/strong> 27.11.2020 \u0440.<\/p>\n

\u0410\u043d\u043e\u0442\u0430\u0446\u0456\u044f \u043c\u043e\u0432\u043e\u044e \u043e\u0440\u0438\u0433\u0456\u043d\u0430\u043b\u0443<\/strong><\/p>\n

\u0412 \u0434\u0430\u043d\u0456\u0439 \u0440\u043e\u0431\u043e\u0442\u0456 \u0434\u043e\u0441\u043b\u0456\u0434\u0436\u0435\u043d\u043e \u0432\u043f\u043b\u0438\u0432 \u0430\u0441\u0438\u043c\u0435\u0442\u0440\u0456\u0457 \u0446\u0438\u043a\u043b\u0443 \u043d\u0430\u0432\u0430\u043d\u0442\u0430\u0436\u0435\u043d\u043d\u044f \u043d\u0430 \u043c\u043e\u0434\u0443\u043b\u044c \u043f\u0440\u0443\u0436\u043d\u043e\u0441\u0442\u0456 \u0430\u0443\u0441\u0442\u0435\u043d\u0456\u0442\u0443 \u043f\u0441\u0435\u0432\u0434\u043e\u043f\u0440\u0443\u0436\u043d\u043e\u0433\u043e NiTi \u0441\u043f\u043b\u0430\u0432\u0443 \u0437 \u043f\u0430\u043c\u2019\u044f\u0442\u0442\u044e \u0444\u043e\u0440\u043c\u0438 \u0456 \u0439\u043e\u0433\u043e \u0432\u0437\u0430\u0454\u043c\u043e\u0437\u0432\u2019\u044f\u0437\u043e\u043a \u0456\u0437 \u0437\u0430\u043b\u0438\u0448\u043a\u043e\u0432\u043e\u044e \u0434\u0435\u0444\u043e\u0440\u043c\u0430\u0446\u0456\u0454\u044e. \u0417\u0456 \u0437\u0431\u0456\u043b\u044c\u0448\u0435\u043d\u043d\u044f\u043c \u0440\u043e\u0437\u043c\u0430\u0445\u0443 \u043d\u0430\u043f\u0440\u0443\u0436\u0435\u043d\u044c \u0432\u0456\u0434 509 \u041c\u041f\u0430 \u0434\u043e 748 \u041c\u041f\u0430 \u043e\u0431\u043e\u0440\u043e\u0442\u043d\u0430 \u0434\u0435\u0444\u043e\u0440\u043c\u0430\u0446\u0456\u044f \u0443 \u043f\u0435\u0440\u0448\u043e\u043c\u0443 \u0446\u0438\u043a\u043b\u0456 \u0437\u0440\u043e\u0441\u0442\u0430\u0454 \u0437 3,7% \u0434\u043e 7,7%. \u0412\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u043e, \u0449\u043e \u0437\u0430 \u043e\u0434\u043d\u0430\u043a\u043e\u0432\u043e\u0433\u043e \u0435\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u043e\u0433\u043e \u043c\u043e\u0434\u0443\u043b\u044f \u043f\u0440\u0443\u0436\u043d\u043e\u0441\u0442\u0456 NiTi \u0441\u043f\u043b\u0430\u0432\u0443 \u0437\u0430\u043b\u0438\u0448\u043a\u043e\u0432\u0430 \u0434\u0435\u0444\u043e\u0440\u043c\u0430\u0446\u0456\u044f \u043f\u0440\u0438 \u0430\u0441\u0438\u043c\u0435\u0442\u0440\u0456\u0457 \u0446\u0438\u043a\u043b\u0443 \u043d\u0430\u0432\u0430\u043d\u0442\u0430\u0436\u0435\u043d\u043d\u044f 0,5 \u043f\u0440\u0438\u0431\u043b\u0438\u0437\u043d\u043e \u0443\u0434\u0432\u0456\u0447\u0456 \u043f\u0435\u0440\u0435\u0432\u0438\u0449\u0443\u0454 \u0437\u043d\u0430\u0447\u0435\u043d\u043d\u044f \u0437\u0430\u043b\u0438\u0448\u043a\u043e\u0432\u043e\u0457 \u0434\u0435\u0444\u043e\u0440\u043c\u0430\u0446\u0456\u0457 \u043f\u0440\u0438 \u0432\u0456\u0434\u043d\u0443\u043b\u044c\u043e\u0432\u043e\u043c\u0443 \u0446\u0438\u043a\u043b\u0456 \u043d\u0430\u0432\u0430\u043d\u0442\u0430\u0436\u0435\u043d\u043d\u044f.
\n\u041a\u043b\u044e\u0447\u043e\u0432\u0456 \u0441\u043b\u043e\u0432\u0430:<\/strong> \u043f\u0441\u0435\u0432\u0434\u043e\u043f\u0440\u0443\u0436\u043d\u0438\u0439 NiTi \u0441\u043f\u043b\u0430\u0432, \u0430\u0441\u0438\u043c\u0435\u0442\u0440\u0456\u044f \u0446\u0438\u043a\u043b\u0443 \u043d\u0430\u0432\u0430\u043d\u0442\u0430\u0436\u0435\u043d\u043d\u044f, \u043c\u043e\u0434\u0443\u043b\u044c \u043f\u0440\u0443\u0436\u043d\u043e\u0441\u0442\u0456.<\/p>\n

\u0420\u043e\u0437\u0448\u0438\u0440\u0435\u043d\u0430 \u0430\u043d\u043e\u0442\u0430\u0446\u0456\u044f \u0430\u043d\u0433\u043b\u0456\u0439\u0441\u044c\u043a\u043e\u044e \u043c\u043e\u0432\u043e\u044e<\/strong><\/p>\n

In this paper, there were investigated the regularities of the influence of the amplitude and stress ratio on the effective Young’s modulus of a pseudoelastic shape memory NiTi alloy and its relationship with other functional properties. Cylindrical specimens with a diameter of 4 mm and gage length of 12.5 mm, machined from rod that was 8 mm in diameter, were tested on servohydraulic testing machine STM-100 under uniaxial cyclic loading at temperature 0\u00b0\u0421 at stress ratio 0 and 0.5. Tests were carried out under displacement\u2013controlled mode at stress ratio 0 and at stress ratio 0.5 under stress\u2013controlled mode. With the increase in the loading cycles, the residual strain grows. An increase in the stress range from 509 to 605 MPa increases the residual strain that leads to the degradation of pseudoelasticity. However, with the further increase in the initial stress range to 740 MPa, the dependence of residual deformation on the number of loading cycles shifts below the same dependence for initial stress range 605 MPa. The indicated inversion from the general law could be due to the fact that the strain range at 740 MPa in the first cycle is 8.7% that exceeds the maximum strain under which the pseudoelastic effect is still visible. With an increase of the stress range from 509 MPa to 748 MPa, the reversible strain increases from 3.7% to 7.7% in the first cycle. Regardless of the stress range, for each stress ratio there were separate dependences of the effective Young’s modulus of NiTi alloy on the residual strain. With both stress ratios, there was observed a decrease in the current effective elasticity modulus with an increase of the residual strain. The increase of the stress ratio from 0 to 0.5 leads to the significant shift to the right. In particular, the residual strain at stress ratio equals to 0.5 is around two times larger the value of residual strain at stress ratio equals to 0 at the same effective elasticity modulus.
\nKeywords:<\/strong> pseudoelastic NiTi alloy, stress ratio, module of elasticity.<\/p>\n

References<\/strong><\/p>\n

    \n
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