176 9 Effective Elastic Constants of a Laminate EDU>>H=0.800 H= 0.8000 EDU>>Ebarx(A,H) ans 83.8448 EDU>>Ebary(A,H) ans 83.8448 EDU>>NUbarxy(A,H) ans 0.0359 EDU>>NUbaryx(A,H) ans 0.0359 EDU>>Gbarxy (A,H) ans 4.4000 MATLAB Example 9.3 Consider a six-layer [+30/0]s graphite-reinforced polymer composite laminate with the elastic constants as given in Example 2.2.The laminate has total thickness of 0.900 mm.The four layers are of equal thickness.Use MATLAB to determine the five effective elastic constants for this laminate. Solution This example is solved using MATLAB.First,the reduced stiffness matrix [Q]for a typical layer using the MATLAB function ReducedStiffness as follows:176 9 Effective Elastic Constants of a Laminate EDU>> H = 0.800 H = 0.8000 EDU>> Ebarx(A,H) ans = 83.8448 EDU>> Ebary(A,H) ans = 83.8448 EDU>> NUbarxy(A,H) ans = 0.0359 EDU>> NUbaryx(A,H) ans = 0.0359 EDU>> Gbarxy(A,H) ans = 4.4000 MATLAB Example 9.3 Consider a six-layer [±30/0]S graphite-reinforced polymer composite laminate with the elastic constants as given in Example 2.2. The laminate has total thickness of 0.900 mm. The four layers are of equal thickness. Use MATLAB to determine the five effective elastic constants for this laminate. Solution This example is solved using MATLAB. First, the reduced stiffness matrix [Q] for a typical layer using the MATLAB function ReducedStiffness as follows: