A Novel Hybrid Element Analysis for Piezoelectric-parent Material Wedges

摘要

A new super wedge-tip hybrid element together with standard hybrid finite elements is developed to determine singular electro-elastic fields at the vertex of piezoelectric-parent material wedges. With the technique, stress and electric displacement intensity factors and energy release rates in a PZT5H panel containing a central crack are computed and compared with the available theoretical solutions. It is shown that the numerical results converge to exact solutions rapidly with fewer elements and proper number of high order terms. Then, the fracture parameters named as general stress intensity parameters and general electric displacement intensity parameters for three kinds of bimaterial wedges such as bi-piezoelectric wedge, piezoelectric-conductor wedge and piezoelectric-composite wedge are computed and depicted in graphical forms.