Symmetric Balance Laminate

Balanced laminate balanced laminate a composite laminate in which all laminate at angles other than 0o and 90o occur only in pairs not necessarily adjacent and are symmetrical around the centerline.

Symmetric balance laminate. 0 45 0 45 0 would be symmetric and balanced yes. Advanced mechanics of composite materials second edition 2007. Flexurally balanced is where d16 d26 0 and bend twist coupling does not exist. A symmetric laminate is one that is balanced at its centerline and forms a mirror image on both sides of the centerline.

Symmetric laminates are characterized by a specific feature their bending stiffness is higher than the bending stiffness of any asymmetric laminate composed of the same layers. I consider 0 90 equal in my cutting for the carbon fiber we use. Glass wouldn t be or some weaves of cf wouldn t be equal. A laminate is symmetric when the plies above the mid plane are a mirror image of those below the mid plane.

Symmetric laminate is where b 0 and in plane out of plane deformation is uncoupled. If you had two 45 plys that were both or then it would symmetric but not balanced.