CIV 240STRENGTH OF MATERIALS HOMEWORK No 2 NORMAL STRESS DUE

CIV 240-STRENGTH OF MATERIALS HOMEWORK No. 2 (NORMAL STRESS) DUE DATE: February 20, 2018 Problem To determine the average shear stress in the pin if the wheel is subjected to a normal force of 3 kN. The supporting wheel on a scaffold is held in place on the leg using a 5-mm-diameter pin. 1 in 1 in 4 in. 1 in, 12 in. in 3 kN (Problem 1) (Problem 2) Problem 2 To determine average normal stress in the material, if the block is subjected to a centrally applied force of P 10 kips? Problem 3 To determine the maximum magnitude P of the loads the beam can support if the average shear stress in each pin is not to exceed 100 MPa. All pins are in double shear, and each has a diameter of 10 mm. (Continued in the back side) 1

Solution

1) Average shear stress= load / area

= 3000/(3.14*5*5/4)

=152.86 N/mm2