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Stiffness in bending mode
Posted Jan 30, 2013, 4:43 PM EST MEMS & Nanotechnology, MEMS & Nanotechnology, Structural Mechanics & Thermal Stresses Version 4.1 1 Reply
I have been COMSOL for quite sometime and have come across a problem that I can not solve very recently.
My objective is to find out the bending stiffness of a metallic nanoplate. What I have been doing is provide COMSOL with Young's modulus, Poissons ratio and density of the metal and got correct values of stiffness for longitudinal mode. However when I go for bending mode the numbers do not match with atomistic simulations. I think this can be solved by introducing anisotropic elastic constants of the metal (C11.C12,C44). Can anyone advise me as to how can I plugin these numbers in the solid mechanics module? Or if I were to plugin these values in the piezoelectric module what should I use for Coupling matrix, relative permittivity, loss factors?