Defining the Design Space for Double–Double Laminates by Considering Homogenization Criterion

The double–double (DD) laminate families that contain two continuous angles, which were proposed by Tsai (“Double–Double: New Family of Composite Laminates,” AIAA Journal, Vol. 59, No. 11, 2021, pp. 4293–4305), opened up a whole new era for composite layups, are easy to manufacture and design. In the present study, design space referred as feasible regions is derived explicitly based on novel formulations lamination parameters DD laminates. This enables boundaries be obtained analytically, providing mathematical support families. result shows their larger than conventional quadaxial laminates in terms industrial practices. A homogenization criterion implemented into space, tailored proposed, expanding possibilities enabling achieved using only 16 plies/4 repeats. work offers significant benefits through practical solutions making design, manufacturing, testing simpler more competitive.