Influence of Anisotropy on the Deformation of a Polymer Composite with Shape Memory

Аннин, Б. Д.; Karpov, E. V.; Larichkin, A. Yu.

doi:10.3103/s0025654420060035

Cited by 4 publications

(4 citation statements)

References 7 publications

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“…Schematic representation of dislocations in a composite coating Как видно из рисунка 1 в плоскости матрицы, в которой равномерно распределены частицы наполнителя (дисперсные включения), дислокация должна проходить между включениями, поскольку тем самым будут создаваться дислокационные петли, которые будут образовывать поле упругих напряжений, затрудняющих проход последующих дислокаций. Расстояние между дисперсными включениями L можно вычислить при контролируемым и / или упорядоченном их расположении в слоях покрытия матрицы [17] 1,91 , 1 1,91…”

Section: таблица 1 химический состав порошка пр-нх17ср4unclassified

“…Сложность теоретического описания и прогнозирования напряжения сдвига согласно теории Фишера-Харта-Прайя, а также теории Орована, в композитных покрытиях, заключается в оценке обоюдного влияния матрицы и наполнителя, но и с изменяющимися размерами наполнителя ввиду высоких температур в процессе его напыления, а также с неоднозначностью определения величины вектора Бюргерса b. Кроме того, при формировании композитного покрытия возможно возникновения агломератов (рисунок 2, a). Чтобы этого избежать, необходимо чтобы матричный материал с включениями наполнителя подвергались спеканию и деформированию в плазменной струе практически одновременно, тогда можно будет избежать агломерации наполнителя (рисунок 1, b) [17].…”

Section: таблица 1 химический состав порошка пр-нх17ср4unclassified

“…Следует отметить, что с помощью формулы (4) описывает напряжение сдвига композитного материала до образования в нем дислокационных петель. При этом, как отмечено в ряде работ [17][18][19], напряжения сдвига композитного покрытия согласно теории Орована практически в два раза расходятся с экспериментальными величинами, полученных в лабораторных условиях.…”

Section: таблица 1 химический состав порошка пр-нх17ср4unclassified

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Hardening of the plasma spraying coating dispersed additional phase of titanium carbide

Trifonov,

Penkov,

Derkanosova

et al. 2022

Vestn. Voronež. gos. univ. inž. tehnol.

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Today in Russia, one of the most important stages in the development of additive gas-thermal technologies is the optimal choice of materials. In particular, in the field of gas-thermal methods for applying composite coatings on the surface of machine parts, plasma spraying technology is advanced and promising from the point of view of economic benefits and import substitution. In this paper, the issue of obtaining a composite coating with an additional dispersed phase (titanium carbide) is considered. The results of theoretical and practical studies on the peculiarities of hardening of the composite coating under study are presented. Calculations of shear stress according to the theories of Fischer-Hart-Pry and Orovan are presented. According to the current GOST, the shear strength of the coating under study is determined. As a result of the work, the structure of the composite coating from the sprayed material 76.5% PR-NX17CP4+23.5% TiC was investigated, namely: the structure of the sprayed composite coating in optical and scanning electron microscopy is presented. The transverse section of the composite coating is also analyzed, and conclusions are drawn on the nature of its formation. Defects of the applied layer of composite coating in the form of cracks, local delaminations, large pores were not detected. The microplate is characterized by high density, uniformity of structure, low porosity, absence of cracks and high adhesion strength of the coating to the substrate. Recommendations have been made on the possible use of plasma spraying material (76.5% PR-NH17CR4+23.5% TiC), in particular when restoring worn surfaces of aircraft landing gear racks and steering gear drives of military and civil aviation. These recommendations are justified due to the high shear strength values of the composite coating under study.

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Section: таблица 1 химический состав порошка пр-нх17ср4unclassified

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Hardening of the plasma spraying coating dispersed additional phase of titanium carbide

Trifonov,

Penkov,

Derkanosova

et al. 2022

Vestn. Voronež. gos. univ. inž. tehnol.

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“…The test method provides a guideline for evaluating its mechanical performances. Annin et al [18] investigated the deformation and damage of the SMPC during the bending and torsion. Moreover, the fiber off-axis angle influences on the formation process was also revealed.…”

Section: Introductionmentioning

confidence: 99%

A Novel Microscopic Modeling Scheme for the Shape Memory Polymer Composites with respect to the Ambient Temperature

Liu

et al. 2022

International Journal of Aerospace Engineering

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This paper is aimed at studying the effective mechanical property of shape memory polymer composites (SMPC) reinforced with natural short fibers. To this end, a novel modeling scheme was presented. The SMPC was firstly equivalent to the composite laminates, and the natural short fibers are also subtly equivalent to the ellipsoidal inclusions distributed in the matrix materials periodically. Moreover, a represented volume element along laminate thickness can be easily chosen, and its elastic constants are accurately acquired by employing a proper microscopic mechanical model. Herein, the high-fidelity generalized method of cells, which represents a good ability in predicting the effective mechanical behaviors of composites, was used. On this basis, the classic laminate theory was improved to suitable for describing the elastic constants and failure strength the SMPC with respect to ambient temperature. Numerical results show a good consistency to the experimental data. Moreover, a higher ambient temperature tends to sharply decrease their final failure strength. It is also revealed that the presented modeling method shows a great potential in calculating the effectively mechanical property of the natural short fiber-reinforced composites.

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Bending shape memory properties and multi-scale viscoelastic behaviors of knitted-fabric reinforced polymer composites

Huang,

Ren,

Liu

et al. 2024

Composites Science and Technology

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Influence of Anisotropy on the Deformation of a Polymer Composite with Shape Memory

Cited by 4 publications

References 7 publications

Hardening of the plasma spraying coating dispersed additional phase of titanium carbide

Hardening of the plasma spraying coating dispersed additional phase of titanium carbide

A Novel Microscopic Modeling Scheme for the Shape Memory Polymer Composites with respect to the Ambient Temperature

Bending shape memory properties and multi-scale viscoelastic behaviors of knitted-fabric reinforced polymer composites

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