1.12 The frame shown consists of four wooden members, ABC, DEF, BE, and CF. Knowing that each member has a 2 × 4-in. rectan- gular cross section and that each pin has a -in. diameter, deter- mine the maximum value of the average normal stress (a) in member BE, (b) in member CF. 45 in. 30 in. 480 lb 4 in. 4 in. 40 in. E |미-15 in. 30 in.

The strain at point A on the bracket has components €g = 330 (10-6), e, = 560 (10-6), Yxy = -570 (10-6), e; = 0. Correct Part B Determine the maximum shear strain in the x - y plane. = 6.15x10-4 'in-plane Submit Previous Answers Correct Part C Determine the absolute maximum shear strain. (Figure 1) Figure < 1 of 1 vec -4 Yaa = 7.99 • 10 max Submit Previous Answers Request Answer X Incorrect; Try Again

If the maximum bending stress at section a–a is not allowed to exceed an allowable stress of 220 MPa, determine the maximum allowable force P that can be applied to the end E.

Load P is applied to joint D and the temperature increases by 50 °F. There are two steel (E = 29*10^6 psi; a = 6.5*10^-6/°F) AD and DC and a bronze (E = 16*10^6 psi; a = 9*10^-6/°F) BD with a length of 50 inches. Each bar is a 0.75 inch diameter. Find the deformation of every rod, the displacement at D, and the stress in each rod.