Abstract
The estimation of shear stiffness of beams began with the analytical approach based on the elasticity. Subsequently, the numerical approach discretizing cross-section has been developed. The numerical method can estimate the shear stiffness of beams with arbitrary shape cross-section. However, the applicability of the method to heterogeneous or composite cross-section has not been studied well. We found that the existing method does not work well for the heterogeneous cross-section. In this paper, we propose that an original definition of rotation of the cross-section considering material properties. The validity of our method has been confirmed by the comparison with a finite element solution of the elasticity.
