Finite element analysis of laminated composite stiffened hyperbolic paraboloid hypershell subjected to impact loading

Abstract

Laminated composite has produced a solution in the weight sensitive branches of engineering due to its low specific weight, high specific strength and weathering resistance. It is its low transverse shear capacity under impact load has become a great concern for the researchers for its successful implementation in different industrial sectors. Impact which is likely to occur in cyclone prone zones and aircraft bases where wind borne debris causes the same. The sudden strike may cause delamination, crack in the epoxy medium or tearing of fibers which remains suppressed under the lamina and eventually causes collapse. This study is an effort to analyze the laminated composite hyparshell under impact load with simply-supported boundary conditions. Installation of stiffeners in various positions become unavoidable in certain cases and which is optimized and the best possible combination is concluded. A detailed comparative study of deformation, stress and strain is done with respect to various impactor velocities. The analysis is done by finite element software Ansys 2022 R1.