Vibro-acoustic response and sound transmission loss analysis of functionally graded plates

Chandra, Namas; Raja, S.; Gopal, K.V. Nagendra

doi:10.1016/j.jsv.2014.06.031

Cited by 89 publications

(48 citation statements)

References 39 publications

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“…The inspection of this table shows that not only a good agreement is observed in comparing these natural frequencies but also the obtained results are appeared to be much closer to 3D method. On the other hand, some deviations exist in the natural frequencies of First order Shear Deformation Theory as a result of applying the shear correction factor by (Chandra et al, 2014) whereas the present work is not employed this correction factor in its equations.…”

Section: Figurementioning

confidence: 75%

“…Additionally, the accuracy of the current results (HSDT) is also provided with comparing the obtained dimensionless natural frequencies from HSDT with those available in literature (Chandra et al, 2014) and (Vel et al, 2004) for the especial case of FG square plate made of Al/ZrO 2 , as shown in Table.2. The inspection of this table shows that not only a good agreement is observed in comparing these natural frequencies but also the obtained results are appeared to be much closer to 3D method.…”

Section: Figurementioning

confidence: 87%

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Investigating Hyperbolic Shear Deformation Theory on vibroacoustic behavior of the infinite Functionally Graded thick plate

Talebitooti

Zarastvand

Rouhani

2019

Lat. Am. j. solids struct.

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This paper applies acoustic analysis of Sound Transmission Loss (STL) through infinite Functionally Graded (FG) thick plate employing Hyperbolic Shear Deformation Theory (HSDT). The procedure for applying a FG plate is followed by considering the material properties are changed continually based on power-law distribution of the materials in terms of volume fraction. The main benefit of HSDT can be justified knowing the fact that, it uses parabolic transverse shear strain across thickness direction. Therefore, no need to enter the extra effect of shear correction coefficient factor. Besides, the displacement field is extended as a combination of polynomial as well as hyperbolic tangent function by neglecting the effect of thickness stretching. Furthermore, the equations of motion are obtained employing Hamilton's Principle. To provide an analytical solution based on HSDT, equations of motion are combined with acoustic wave equations. Moreover, some comparisons are made with the known theoretical and experimental results available in literature to verify the accuracy and efficiency of the current formulation. These comparisons reveal an excellent agreement. Consequently, some configurations are presented to demonstrate which parameters appear to be effective to improve the behavior of STL including the effects of modulus of elasticity and density in the thickness direction with respect to various power-law distributions.

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Section: Figurementioning

confidence: 75%

Section: Figurementioning

confidence: 87%

Investigating Hyperbolic Shear Deformation Theory on vibroacoustic behavior of the infinite Functionally Graded thick plate

Talebitooti

Zarastvand

Rouhani

2019

Lat. Am. j. solids struct.

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“…As a result of this, their properties gradually change in the unit cell, therefore, giving them strong bonding and reduced stress concentration [83]. The vibro-acoustic response and STL of this type of material was studied by Chandra et al [84]. The rectangular panel was graded with metal (i.e., aluminum) and ceramics (i.e., alumina and zirconia).…”

Section: Functionally Graded Materials Of Sandwich Structuresmentioning

confidence: 99%

Comparative Study of Sound Transmission Losses of Sandwich Composite Double Panel Walls

2020

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The increasing motivation behind the recently wide industrial applications of sandwich and composite double panel structures stems from their ability to absorb sounds more effectively. Meticulous selection of the geometrical and material constituents of both the core and panels of these structures can produce highly desirable properties. A good understanding of their vibro-acoustic response and emission index such as the sound transmission loss (STL) is, therefore, a requisite to producing optimal design. In this study, an overview of recent advances in STL of sandwich and composites double panels is presented. At first, some salient explanation of the various frequency and controlled regions are given. It then critically examines a number of parameter effects on the STL of sandwich and composite structures. Literatures on the numerical, analytical and experimental solutions of STL are systematically presented. Efficient and more reliable optimization problems that maximize the STL and minimize the objective functions capable of degrading the effectiveness of the structure to absorb sounds are also provided.

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“…Also, functionally graded material (FGM), introduced in recent years, is among the newest materials that have drawn scientists’ attention. Chandra et al . analytically studied the vibroacoustics of FGM plates with a simple first‐order shear deformation theory.…”

Section: Introductionmentioning

confidence: 99%

Experimental and theoretical investigation of sound transmission loss for polycarbonate, poly(methyl methacrylate), and glass

Sabet

Ohadi

2015

J of Applied Polymer Sci

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In this study, the effects of the soundproofing properties of polycarbonate (PC), poly(methyl methacrylate) (PMMA), and glass were investigated. We fabricated the specimens into 3 mm thick sheets by direct hot compression molding as a monolithic sample and also by gluing three thin sheets together into a multilayer. Sound transmission loss (STL) was measured by an impedance tube over the frequency range 63-1600 Hz. The results indicate that because of the close density, the STLs for PC and PMMA were almost the same above 1200 Hz. Also, PMMA had a greater STL than PC in the range 63-300 Hz. In a comparison of the monolithic and multilayered samples, we demonstrated that the epoxy-based adhesive interlayers had more efficient bonding than the siliconebased ones. The multilayered polymer/silicone specimens showed a sharp drop in the STL values compared to the monolithic samples. However, the multilayered polymer/epoxy specimens revealed similar behavior to the monolithic polymers. V C 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 42988.

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Vibro-acoustic response and sound transmission loss analysis of functionally graded plates

Cited by 89 publications

References 39 publications

Investigating Hyperbolic Shear Deformation Theory on vibroacoustic behavior of the infinite Functionally Graded thick plate

Investigating Hyperbolic Shear Deformation Theory on vibroacoustic behavior of the infinite Functionally Graded thick plate

Comparative Study of Sound Transmission Losses of Sandwich Composite Double Panel Walls

Experimental and theoretical investigation of sound transmission loss for polycarbonate, poly(methyl methacrylate), and glass

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