امتیاز موضوع:
  • 56 رأی - میانگین امتیازات: 3.16
  • 1
  • 2
  • 3
  • 4
  • 5
On the Mechanical Behavior of a Functionally Graded Micro-beam Subjected to a Thermal
#1
On the Mechanical Behavior of a Functionally Graded Micro-beam Subjected to
a Thermal Moment and Nonlinear Electrostatic Pressure
Mahdi Abbasgholipur
Mech. Eng. Dept., Bonab Branch,
Islamic Azad University, Bonab,
Iran,
m.a_pour@yahoo.com
Rahim Habibifar
Mech. Eng. Dept., Bonab Branch,
Islamic Azad University, Bonab,
Iran,
rahimhabibifar@yahoo.com
Behzad Mohammadi-Alasti1
Mech. Eng. Dept., Bonab Branch,
Islamic Azad University, Bonab,
Iran,
behzad.alasti@gmail.com
Nushin Chamheydar
Mech. Eng. Dept., Bonab Branch,
Islamic Azad University, Bonab,
Iran,
nushin.chamheidar@gmail.com
Abstract
In the present work, mechanical behavior of a functionally graded cantilever micro-beam
subjected to a nonlinear electrostatic pressure and temperature changes has been studied. It
has been assumed that the top surface is made of pure metal and the bottom surface from a
metal- ceramic mixture. The ceramic constituent percent of the bottom surface varies from
0% to 100%. In addition to the Volume Fractional Rule of material, exponential function has
been used for representation of continuous gradation of the material properties through microbeam
thickness. Attention being paid to the ceramic constituent percent of the bottom surface,
five different types of FGM micro-beams have been investigated. Nonlinear integrodifferential
thermo-electro mechanical equation based on Euler-Bernoulli beam theory has
been derived and solved using Step-by-Step Linearization Method and Finite Difference
Method. The effects of temperature changes and the electrostatic pressure on the deflection
and stability of FGM micro-beams having various amounts of the ceramic constituent have
been studied and normal stress distributions in the cross section along the beam thickness
have been given and compared with a classic metal beam.
Keywords: MEMS, FGMs Cantilever Micro-beam, Thermal, Electrical, Pull-in Voltage, Static
Instability
[تصویر:  download.php?img=632] رمز :www.mokhs.com
پاسخ


پرش به انجمن:


کاربرانِ درحال بازدید از این موضوع: 1 مهمان