Buy article PDF
Instant access to
the full article PDF
for the next 48 hrs
US$ 35
|
Steel and Composite Structures Volume 33, Number 4, November25 2019 , pages 509-523 DOI: https://doi.org/10.12989/scs.2019.33.4.509 |
|
|
|
Hydro-thermo-mechanical biaxial buckling analysis of sandwich micro-plate with isotropic/orthotropic cores and piezoelectric/polymeric nanocomposite face sheets based on FSDT on elastic foundations |
||
Javad Rajabi and Mehdi Mohammadimehr
|
||
| Abstract | ||
| In the present work, the buckling analysis of micro sandwich plate with an isotropic/orthotropic cores and piezoelectric/polymeric nanocomposite face sheets is studied. In this research, two cases for core of micro sandwich plate is considered that involve five isotropic Devineycell materials (H30, H45, H60, H100 and H200) and an orthotropic material also two cases for facesheets of micro sandwich plate is illustrated that include piezoelectric layers reinforced by carbon and boron-nitride nanotubes and polymeric matrix reinforced by carbon nanotubes under temperature-dependent and hydro material properties on the elastic foundations. The first order shear deformation theory (FSDT) is adopted to model micro sandwich plate and to apply size dependent effects from modified strain gradient theory. The governing equations are derived using the minimum total potential energy principle and then solved by analytical method. Also, the effects of different parameters such as size dependent, side ratio, volume fraction, various material properties for cores and facesheets and temperature and humidity changes on the dimensionless critical buckling load are investigated. It is shown from the results that the dimensionless critical buckling load for boron nitride nanotube is lower than that of for carbon nanotube. It is illustrated that the dimensionless critical buckling load for Devineycell H200 is highest and lowest for H30. Also, the obtained results for micro sandwich plate with piezoelectric facesheets reinforced by carbon nanotubes (case b) is higher than other states (cases a and c).The results of this research can be used in aircraft, automotive, shipbuilding industries and biomedicine. | ||
| Key Words | ||
| biaxial buckling analysis; micro sandwich plate; isotropic and orthotropic cores; piezoelectric layers reinforced by carbon and boron nitride nanotubes facesheets; polymeric matrix reinforced by carbon nanotubes; temperature-dependent and hydro material properties; micro-mechanical and the extended rule of mixture approaches | ||
| Address | ||
| Department of Solid Mechanics, Faculty of Mechanical Engineering, University of Kashan, P.O. Box: 87317-53153, Kashan, Iran. | ||