2. The automobile structure is subjected to a twist ditch torque of 7730 Nm as shown in Fig. 1. The static equilibrium analysis on the surface and bar elements have been conducted and the loads on the cowl bar are shown in Fig. 4. It is required to determine appropriate section size for the cowl bar. If the cowl bar is to be made of structural steel, what thin-walled section size would you recommend for the cowl bar? 900 mm Plan View Sedan General Arrangement Layout width of cowl bar 1500 mm Provided b Fig. 1 a Light Steel Auto Boy, USA F=TAXW Fig. 3 + 1250 mm 750 mm Model geometry data 500 mm 500 mm track 1560mm twist ditch torque -7,730 Nm -7,730,000 Nmm 1250 mm 1000 mm + Fig. 2 Internal Loads on Cowl 1000 mm 3435.56 5725.93 M=1,030,667 Nmm 250 mm Fig. 4 5725.93 250 mm 5 points 3435.56 750mm Bending moment (Nm) max moment 1030666.67