When 0o ply is included and lay on the surface in a laminate, the ultimate strength is the highest; if a laminate does not possess both 0oply and 90° ply, then it shows relatively large first-ply failure strength, but the ultimate strength is much smaller
When 0o ply is included and lay on the surface in a laminate, the ultimate strength is the highest; if a laminate does not possess both 0oply and 90° ply, then it shows relatively large first-ply failure strength, but the ultimate strength is much smaller
拉伸试验和有限元数值分析表明：若板内含有0o层，且该层位于板的表层时，则最终强度最大；若板内既无0o层，又无90o层，则初始层破坏强度较大，而最终强度远小于含有0o层板的最终强度。