98 6 Elastic Constants Based on Global Coordinate System 3.17691.98121.17130.86170.69870.57750.4663 0.36160.27990.24800.27990.36160.46630.5775 Columns 15 through 19 0.69870.86171.17131.98123.1769 The plot of the values of vux versus 0 is now generated using the following commands and is shown in Fig.6.4.Notice that this ratio is an even function of 0. Notice also the rapid variation of the ratio as 0 increases or decreases from 0. 35 25 0.5 9000604020020406060100 Fig.6.4.Variation of vyz versus 0 for Example 6.2 >plot(x,y4) >xlabel('\theta (degrees)'); >ylabel('\nu_{yx}'); Next,the shear modulus Gry is calculated at each value of 0 between-90 and 90 in increments of 10 using the MATLAB function Gry. >Gxy1=Gxy(155.0,12.10,0.248,4.40,-90) Gxy1 4.4000 >Gxy2=Gxy(155.0,12.10,0.248,4.40,-80) Gxy2 4.728598 6 Elastic Constants Based on Global Coordinate System 3.1769 1.9812 1.1713 0.8617 0.6987 0.5775 0.4663 0.3616 0.2799 0.2480 0.2799 0.3616 0.4663 0.5775 Columns 15 through 19 0.6987 0.8617 1.1713 1.9812 3.1769 The plot of the values of νyx versus θ is now generated using the following commands and is shown in Fig. 6.4. Notice that this ratio is an even function of θ. Notice also the rapid variation of the ratio as θ increases or decreases from 0◦. Fig. 6.4. Variation of νyx versus θ for Example 6.2 >> plot(x,y4) >> xlabel(‘\theta (degrees)’); >> ylabel(‘\nu_{yx}’); Next, the shear modulus Gxy is calculated at each value of θ between −90◦ and 90◦ in increments of 10◦ using the MATLAB function Gxy. >> Gxy1 = Gxy(155.0, 12.10, 0.248, 4.40, -90) Gxy1 = 4.4000 >> Gxy2 = Gxy(155.0, 12.10, 0.248, 4.40, -80) Gxy2 = 4.7285