Experimental and Numerical Analyses of Different Boundaries Conditions on Composite Spherical Shell Cup by using APDL programmed

Many researches have been done to obtain the factors that affect the value of the natural frequency for composite shell. The free vibration of composite spherical shell cap under impact loading is investigated in this study. The analysis is carried out theoretically using the higher-order shear deformation theory for composite spherical shell under impact loading, the results obtained was compared with numerical analysis using APDL program in the ANSYS software and experimentally using the hummer impact testing system and sigview program. The effects of radius of curvature, Thickness and boundary conditions (built in, quarter built in (arc), simply supported) on the basic frequency of orthotropic composite spherical shell cap have been investigated. The results show the dynamic characteristic it must be seen the rate of decreasing or increasing in the natural frequency of the composite material to take into consideration the effect of duration of impact loading on the dynamic properties of spherical composite shell. Selective composite material and its composition are 50% (0-90) woven fiber glass and 50% polyester resin.