Can we find natural frequency of woven fabric composites (3D orthotropic) using the relation (fn = C*sqrt(E*I/w*L^4) used for isotropic materials?

I am trying to determine the natural frequency of different sets of woven fabric composites made from carbon fabrics. I am wondering if we can use the same relation (fn = C*sqrt(E*I/w*L^4) to...

01 January 2015 9,041 4 View