Multimaterial fully isotropic laminates and multimaterial quasi- homogeneous anisotropic laminates

摘要

The present invention discovers the layup ofPP i. a multimaterial fully isotropic laminate that exhibits a concomitant stiffness isotropy in extension, shear, bending, and twisting; and PP ii. a multimaterial quasi-homogeneous anisotropic laminate that has identical stiffness anisotropy in extension and bending as well as in shear and twisting.PPIn addition, layups of the multimaterial fully isotropic laminate lead to a substantially new category of the single-material fully isotropic laminate.P PAlthough these laminate layups have distinctive applications as load- carrying structures, the approaches and models that generate these layups are closely related.