EAS4240/6939 Project – Phase IA cylindrical pressure vessel of radius 2m is to be designed for pressure of 1 MPa (about tenatmospheres). If the pressure vessel were to be designed from aluminum with a yield stress of 500 MPa,then it would be designed by the hoop stress6/210 /hoopprtt, so that the required thicknesswould be 4 mm. You are to design the skin from graphite‐epoxy with the following properties (as givenin Example 6.3.2):Xt=Xc=1500 MPa, Yt=40 MPa, Yc=246 MPa, S=68 MPa, E1=181 GPa, E2=10.3 GPa,G12=7.17 GPa,6612120.28,0.0210/,22.5 10/ooCC,tply=0.125mm. To calculate thethermal stresses, use the cure temperature as 170oC and operating temperature of 20oC.1.Use the maximum strain criterion to design the lightest balanced and symmetric laminate thatcan carry safely the loads. Define the axial direction as the x direction, and then you expect alaminate that will have average ply orientation larger than 45o, because the average axial stressis half of the average hoop stress. For this part, allow the number of plies to be a continuous
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