64 LAMINATED COMPOSITES Plygroup 2 Fabric 1 Layer 1 Layer 2 Plygroup 1 Figure 3.1:Laminated composite. 个3 S 工1V Figure 3.2:The x,y,z laminate coordinate system,the xi,x2,x3 ply coordinate system,and the ply angle. 60 60 90 90 0 0 0 0 45 45 459 45 Figure 3.3:Description of the layup in a laminate consisting of unidirectional plies [453/04/902/601. -45 45 -45 -45 0 -45 0 45 0 45 0 -45 -45 -45 -45 45 [-452z/02l [45/-45z/45] Figure 3.4:Examples of symmetrical laminates64 LAMINATED COMPOSITES z y x Plygroup 2 Fabric 1 Layer 1 Layer 2 Plygroup 1 Figure 3.1: Laminated composite. x z y Θ x1 Θ x2 x3 x Figure 3.2: The x, y, z laminate coordinate system, the x1, x2, x3 ply coordinate system, and the ply angle. 60 0 0 0 90 90 0 x y 60o 45o 45 45 45 Figure 3.3: Description of the layup in a laminate consisting of unidirectional plies [453/04/902/60]. 0 0 0 0 45 45 45 45 [45/–452/45]s –45 –45 –45 –45 –45 –45 –45 –45 [–452/02]s Figure 3.4: Examples of symmetrical laminates