Question 2 (30 Marks) A space-satellite structure is made of a composite laminate tailored for the following thermal expansion properties: = ax*0.1 x 10-6 m/m/C ; = +10.5 x 10-6 m/m/C A certain percentage of the plies are oriented at +/-75. Given a maximum temperature change of -200C from the material's stress-free temperature, use the Tsai-Wu failure criterion to calculate the factor of safety in these plies. [30] Given: E = 204.2 GPa, E = 15.77 GPa, G12 = 7.31 GPa, V12 = 0.32 P.T.O. T C T X = 1300 MPa, X = 1080 MPa, X = 90 MPa, X = 130 MPa X6= 160 MPa 1 = +1.35 x 10 m/m/C ; = +8.96 x 10-6 m/m/C Page 3 of 8