The steel bar has the original dimensions shown in the figure with b = 350 mm and c = 222 mm. If it is subjected to an axial load P 33 kN, what is the change in its length? Et 200 GPa. !! %3D %3D P. 20m O 0.128 mm O 0.0925 mm O 0.0564 mm O 0.0571 mm

this is about thermal stress

3. The bar shown below is composed of two pieces, AC and CD. The bar is attached to the wall at point A. The length L = 10 in. The cross sectional areas are: AAC = 4 in? and AcD = 2 in?. The Young's Moduli are: EAC =20 Msi and Ecd= 15 Msi Two forces are applied at points B and D: PB = 50 kips and PD = 20 kips. Determine: (a) the reaction force at A (specify –→ or +) and (b) the deflection of point D (specify → or +). (Hint for (b): Think about how many pieces you must subdivide the rod into.) Ans: RA = 30 kips (+), dp = 7.9167×10-3 in (E) A В C D Pp L 2L L

E. Rigid bar AD is horizontal before the weight of 112 lb is applied to the end of wire BC at C. The wires have a radius of 0.025" and are made of A913 steel. Determine the rotation of AD and how far C will move down due to application of the weight See Appendix of text for any material properties needed. Ans: 0.00071 radians 3 ft - 2 ft -3 ft- D B 4 ft W