Solved examples from mechanics of materials about designation of stress in rods. On this it’s possible to find various examples in which stress in rods is designated. Examples which are placed here you can learn following:
• designation of equilibrium equations
• application of Hooke’s law
• designation of maximum stress

Designation of stress in the rods – example 1

Three rods are screwed on separately to the ceiling. Second ends of rods are connected together in one point. In connection point works a force P. Force P is directed down. All rods under work of force P are stretched. In exercise we will designate equilibrium equations. Hooke’s law will also be used. Subject of example is to find minimum value of rod’s section area which will provide enough strength.

Stress in the rods during squeezing and stretching – example 1

Designation of stress in the rods – example 2

Two rods are screwed on separately to the wall. Third rod is fixed to the ceiling. Second ends of rods are connected together in one point. Force P works in point of connection. Force P is directed down. Two rods under work of force P are stretched. One rod is squeezed In exercise we will designate equilibrium equations. Hooke’s law will also be used. Subject of example is to find minimum value of rod’s section area which will provide enough strength.

Stress in the rods during squeezing and stretching – example 2