A material having a shear modulus G, is deformed under a pure shear stress as shown in the following figure. Calculate the applied shear stress. Given: a = 4 mm, b = 300 mm and G = 25 GPa. Consider a linear elastic behavior. a Select one: O t= 250 Mpa

A rigid bar ACE is supported by three vertical wires and is initially horizontal, as shown in the figure. Then, a force P is applied at the center of the bar. All wires are made from the same material with modulus of elasticity E = 200 GPa and have the same cross-sectional area, A = 10 mm². You may assume that the deformations are small and that the stresses are within the elastic range for this problem. 1.5 m A D F 1.0 m 1.0 m H C E P A 2.0 m Figure 3.1: Rigid bar supported by three vertical wires a) Find the normal stresses and the axial displacements in the wires if P = 15 kN. b) Knowing that AB is the critical wire, and its yield stress is oy maximum P that can be applied. = 1500 MPa, find the

For the truss in figure below, the cross-sectional area of the truss members is A = 500 mm2 and Young’s modulus E = 200 GPa. Let P = 95.8 kN. Determine: a) Strain energy for truss AC. Enter your answer in J to 2 decimal places. b) Strain energy for truss AB. Enter your answer in J to 2 decimal places. c) Strain energy for truss BC. Enter your answer in J to 2 decimal places. d) Strain energy for truss BD. Enter your answer in J to 2 decimal places. e) Strain energy for truss DC. Enter your answer in J to 2 decimal places. f) Strain energy for truss DF. Enter your answer in J to 2 decimal places. g) Strain energy for truss FC. Enter your answer in J to 2 decimal places. h) Strain energy for truss CE. Enter your answer in J to 2 decimal places. i) The displacement at point A. Enter your answer in mm to 2 decimal places.