Consider a glass-polymer composite test coupon which its fibers oriented at an unknown angle 8 (0 0 60 in 10 increment) with respect to the longitudinal direction (x) and have dimensions as shown in the following figure. This composite test coupon is mounted on a universal testing machine and is subjected to a tensile load F. Two strain gauges (a, b) are installed at the mid-length of the test sample. If at F=1200 N, the two strain gages record the following values: a = -0.00167 mm/mm, & = 0.00336 mm/mm. A. What is the fiber angle of the test coupon? B. What is the change in the right angle of the element A at F=1800 N? Use the following material properties for glass-polymer composite: V12 G3 G13 G12 al z B B 12 mm Coupon cross-section Glass-polymer composite 50.0 GPa 15.20 GPa 15.20 GPa 0.428 2 mm 0.254 0.254 3.28 GPa 4.70 GPa 4.70 GPa 6.34 x 10-6C 23.3 10 6C 23.3 x 10-6C 434 x 10-6%M 6320 x 10-6%M 6320 x 10-%%M 0? 491000-2 12 mm 0.003536 F Element A F 200 mm Test coupon under tension