Learning Goal: I’m working on a mechanical engineering exercise and need an explanation and answer to help me learn.

g) Calculate the diameters required for the pins in joints A and C by the mechanical strength criterion;

h) Consider element ABC as a bi-supported beam at A and C (adopt the same loads and support reactions

already calculated in the previous items), present the equations and sketch the diagrams of normal force N, shear

V and bending moment M;

i) Check the results of the N, V and M diagrams using the software/app of your choice. present the results

graphics and numbers.

# Category: Mechanical Engineering

Learning Goal: I’m working on a mechanical engineering exercise and need an explanation and answer to help me learn.

Let the structure of the figure below. Consider frictionless pins at A, B and C. Required:

a) The free body diagram of the structure;

b) The free body diagram of the separate parts;

c) The support reactions at A and C and the resultant force acting on member BC;

d) Check the calculations of efforts and support reactions using Ftool or other software/app of your choice.

Present the graphical and numerical results of the adopted software.

e) Is bar BC in tension or compression? Calculate the required diameter of the solid bar BC by the

resistance to normal stresses (consider the midpoint section of the bar);

f) Calculate the normal strain and elongation of bar BC. The bar must increase or decrease by

length? What is the expected variation for the diameter of the bar in mm (indicate whether it increases or decreases the

diameter)?