1Department of Mechanical Engineering, P.V.P. Siddhartha Institute of Technology, Kanuru, VIJAYAWADA, A.P., India
2Department of Mechanical Engineering, A.U. College of Engineering, Andhra University, Visakhapatnam, A.P., India.
Notationσ
Normal Stress
τShear Stress
εNormal Strain
γShear Strain
Elastic Constants (Elements of stiffness matrix) (i,j = 1,2,……6)
θFiber angle in degrees
In the present paper simplified 3-D Finite Element models are developed with governing boundary conditions and solved using the FEA software ANSYS version 11 for the prediction of stiffness elements of unidirectional continuous fiber reinforced specially and generally orthotropic laminae. The results of the present work are compared with the analytical solutions and found very close agreement. It is observed that there exist 13 independent elastic constants for generally orthotropic lamina and behaves like a monoclinic material. A special case of monoclinic material with 9 independent constants is seen at fiber angle of 45 degrees. The specially orthotropic lamina with 5 independent constants is behaving like a transversely isotropic. The present analysis is useful to study the mechanical behavior of an angle ply lamina which is required for selection of stacking sequence of laminates. The analysis can be extended for the laminates where the analytical solutions are not available.
Stiffness elements, Angle-ply lamina, Finite Element Method
