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VIBRATION ANALYSIS OF AN AXIALLY MOVING MULTISCALE COMPOSITE PLATE SUBJECTED TO THERMAL LOADING
Last modified: 2017-11-07
Abstract
Axially moving flat composite objects at high speeds, can be found in many differing technical applications. These include paper webs during production, processing and printing, textile webs during production and processing, conveyor belts and flat objects moving at high speeds in space. Many factors influence the dynamic behavior of the moving object. The most important are: transport speed, tension, material properties and influence of external environment. Among the external factors affecting the dynamics, temperature plays an important role.
Studies on dynamics of stationary composites are carried out for a long time. At the turn of the centuries composite materials began to appear particularly in the aerospace, maritime and space industries because they offer a number of advantageous mechanical properties. These properties include resistance to electrochemical corrosion, high strength and rigidity with less weight than conventional materials.. In recent years, considerable research effort has been devoted to multiscale composites: carbon nanotubes (CNTs) and graphene-reinforced materials. Carbon nanotubes are very good reinforcement because of their unique mechanical properties and large surface area per unit volume. Experimental studies show that CNTs have a modulus greater than the graphite fibers, and strengths at least an order of magnitude higher than typical graphite fibers. Graphene attracted considerable interest because of its extraordinary mechanical, electronic and thermal properties. Experimental studies have shown that the single-layer graphene can present exceptional thermal conductivity which outperforms all other known materials.
For recent several years, graphene and CNTs have been used as reinforcement for polymeric composites because of their relative ease of processing. However, in recent times there has been increased interest in using matrices such as metals, semiconductors, and ceramics in addition to that of polymers. This study deals with metal matrix multiscale composites (MMMCs). Copper has been used as the metal matrix. MMMCs have less weight and higher strength in comparison to the conventional metals and alloys. MMMCs also have lower coefficient of friction and better resistance to wear and corrosion. Therefore these can be used in a variety of engineering applications such as automobile and aerospace industries. The state of researches in mechanical and tribological properties of MMMCs in the paper by Moghadam et al. [1] is presented.
The objective of this study is vibration analysis of the axially moving multiscale composite plate taking into account thermal effects. To describe thermomechanical properties of the plate material, properties of multiscale reinforced stationary composites presented in literature are taken into account [2]. Fractional standard rheological model of the plate material as the function of reduced frequency depended on the temperature is taken into account [3]. The effects of temperature, transport speed, and internal damping on natural frequencies are analyzed.
[1] Moghadam AD, Omrani E, Menezes PL, Rohatgi PK (2015); Mechanical and tribological properties of self-lubricating metal matrix nanocomposites reinforced by carbon nanotubes (CNTs) and graphene – a review, Comp Part B, 77, 402-20
[2] Sharma S, Kumar P, Chandrai R (2016), Mechanical and trhermal properties of graphene -carbon nanotube- reinforced metal matrix composites: A molecular dynamics study, Journal of Composite Materials, DOI: IO.1177/0021998316682363
[3] Marynowski K. (2017); Free vibration analysis of an axially moving multiscale composite plate including thermal effect, International Journal of Mechanical Science 120, 62 – 69.
Studies on dynamics of stationary composites are carried out for a long time. At the turn of the centuries composite materials began to appear particularly in the aerospace, maritime and space industries because they offer a number of advantageous mechanical properties. These properties include resistance to electrochemical corrosion, high strength and rigidity with less weight than conventional materials.. In recent years, considerable research effort has been devoted to multiscale composites: carbon nanotubes (CNTs) and graphene-reinforced materials. Carbon nanotubes are very good reinforcement because of their unique mechanical properties and large surface area per unit volume. Experimental studies show that CNTs have a modulus greater than the graphite fibers, and strengths at least an order of magnitude higher than typical graphite fibers. Graphene attracted considerable interest because of its extraordinary mechanical, electronic and thermal properties. Experimental studies have shown that the single-layer graphene can present exceptional thermal conductivity which outperforms all other known materials.
For recent several years, graphene and CNTs have been used as reinforcement for polymeric composites because of their relative ease of processing. However, in recent times there has been increased interest in using matrices such as metals, semiconductors, and ceramics in addition to that of polymers. This study deals with metal matrix multiscale composites (MMMCs). Copper has been used as the metal matrix. MMMCs have less weight and higher strength in comparison to the conventional metals and alloys. MMMCs also have lower coefficient of friction and better resistance to wear and corrosion. Therefore these can be used in a variety of engineering applications such as automobile and aerospace industries. The state of researches in mechanical and tribological properties of MMMCs in the paper by Moghadam et al. [1] is presented.
The objective of this study is vibration analysis of the axially moving multiscale composite plate taking into account thermal effects. To describe thermomechanical properties of the plate material, properties of multiscale reinforced stationary composites presented in literature are taken into account [2]. Fractional standard rheological model of the plate material as the function of reduced frequency depended on the temperature is taken into account [3]. The effects of temperature, transport speed, and internal damping on natural frequencies are analyzed.
[1] Moghadam AD, Omrani E, Menezes PL, Rohatgi PK (2015); Mechanical and tribological properties of self-lubricating metal matrix nanocomposites reinforced by carbon nanotubes (CNTs) and graphene – a review, Comp Part B, 77, 402-20
[2] Sharma S, Kumar P, Chandrai R (2016), Mechanical and trhermal properties of graphene -carbon nanotube- reinforced metal matrix composites: A molecular dynamics study, Journal of Composite Materials, DOI: IO.1177/0021998316682363
[3] Marynowski K. (2017); Free vibration analysis of an axially moving multiscale composite plate including thermal effect, International Journal of Mechanical Science 120, 62 – 69.