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Nanoscience and Technology: An International Journal

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ISSN Print: 2572-4258

ISSN Online: 2572-4266

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 1.3 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 1.7 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.7 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00023 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.11 SJR: 0.244 SNIP: 0.521 CiteScore™:: 3.6 H-Index: 14

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NANOSTRUCTURAL MODEL OF SHAPE MEMORY ALLOY WITH RESISTANCE ASYMMETRY BEHAVIOR

Volume 9, Issue 2, 2018, pp. 165-181
DOI: 10.1615/NanoSciTechnolIntJ.2018026744
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ABSTRACT

The behavior of shape memory alloys (SMAs) depends substantially on the type of stress-strain state. For example, under active tension and compression of initially chaotic martensite, the martensitic inelasticity curves differ both in absolute values and in shape. A flat sloping section of the curve like on yield plateau is present under tension and is absent in the case of compression. A nonlinear model of polycrystalline SMA phase-structural deformation that takes into account the martensite nanostructure is proposed using the hypothesis of heterogeneous strain hardening of a representative volume and an analogue of the incremental plasticity theory with isotropic and translational hardening to describe the structural transformation. Two dimensionless parameters proportional to the ratio of deviator's third invariant to the cube of intensity of the inelastic strain tensor and active stress tensor are introduced to take into account the type of strain and stress state, respectively. The parameter of martensitic volume isotropic hardening is lifetime maximum of the ratio of inelastic strain intensity to its limit value corresponding to the current strain state type. The material function of translational hardening depends on the full stress intensity and stress state type. The test modes of SMA loading to the determination of the functions used in the model are described. Special cases of SMA martensitic inelasticity in a homogeneous stress state and corresponding simplifications of the basic equations are considered. The first case relates to the proportional loading of a specimen, the second one relates to the axial tension–compression and torsion of a thin-walled cylindrical rod.

CITED BY
  1. Movchan A. A., Model for the Effect of the Phase Mechanism of Deformation on the Structural Mechanism in Shape Memory Alloys, Russian Metallurgy (Metally), 2020, 4, 2020. Crossref

  2. Movchan A. A., Kazarina S. A., Sil’chenko A. L., Cross Hardening of a Shape Memory Alloy during Compression, Russian Metallurgy (Metally), 2019, 10, 2019. Crossref

  3. Dumanskiy S A, Stability of Shape Memory Alloy rods under reverse phase transformation in case of initial tensile phase-structural strains, IOP Conference Series: Materials Science and Engineering, 934, 2020. Crossref

  4. Movchan A. A., Joint Model for the Phase-Structural Deformation of Shape Memory Alloys, Russian Metallurgy (Metally), 2021, 4, 2021. Crossref

  5. Dumanskiy S A, Stability analysis of a round cross-section rod from Shape Memory Alloys at reverse phase transition, IOP Conference Series: Materials Science and Engineering, 747, 1, 2020. Crossref

  6. Movchan A. A., Method of analytical inverting of nonlinear constitutive relations of the combined model of phase and structural deformation of shape memory alloys, INTERNATIONAL CONFERENCE OF COMPUTATIONAL METHODS IN SCIENCES AND ENGINEERING ICCMSE 2021, 2611, 2022. Crossref

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