Any reason why you are wanting to stick with cross-ply?.    From Wordnik.com.  [Army Rumour Service] Reference

Also, do you want to develop a Finite Element Program by using special Elements or are you using Failure criteria for composite materials in order to determine allowable strength curves in strain space with superposed failure envelopes of plies (in cross-ply laminates) with different orientations?.    From Wordnik.com.  [iMechanica - Comments] Reference