Normal stress occurs in the direction of the internal force. A bar is 35 mm wide and 10 mm thick. Normal stress changes over the length of the bar based on the internal forces at each segment. The normal stress is considered to act uniformly through the cross section of the bar In this activity, you will change the force at point D of the bar that remains in equilibrium and observe 1. The change in stress
2. The internal normal forces at the three segments of the bar
3. The normal stress along the three segments of the bar B 4.00 kN 9.00 kN 12.00 kN 22.00 kN 35 mm 4.00 kN 9.00 kN 50 40 30 20 10 A-B 32.00 kN 91.43 MPa B-C 40.00 kN 114.29 MPa C-D 22.00 kN 62.86 MPa Internal Force Average Normal Stress Drag slider to change force at D 0 1 23 45 6 78 9 10 112 13 14 15 16 17 18 19 20 21 22 23 2425 FD (kN)
Based on this example, What load would yield an average mormal stress of 88 MPa in segment BC?
a) between 14 and 17kN
b) about 3 kN
c) more than 18 kN
d) less than 11 kN