Modal Analysis of 3D Multi-axial Hybrid Composite with Experimental and Numerical Methods

This work proposed a homogenized method to predict the modal properties of the three dimensional multi-axial hybrid composite. The multi-scale calculation process was characterized with a representative unit cell to derive the elastic parameters of the composite. Then the modal behaviors (natural frequency and modal shape) of the composite were simulated through the finite element method (FEM). The experimental modal analysis of key vibration parameters was conducted using a modal hammer with an acceleration sensor to verify the efficiency of the numerical results. The result shows that the maximum relative errors between experimental and FEM values of natural frequency are about 13%. Therefore, the numerical-experiment method could be used to predict the modal behavior of three dimensional multi-axial hybrids composite.