VIDEO: Shear stress and shear stress simply explained

That is shear and shear stress

• In both cases it is a question of forces that act parallel to one of the base surfaces, in contrast to tensile forces or compressive forces that pull a body apart or compress it in length.
• The term shear stress refers to the effect of the force, this triggers a shear (see sketch).
• The term shear stress refers to the fact that the object can also be displaced with this force.
• Any force that is exerted in this way usually causes deformation (shear) and movement (thrust) at the same time. The effect of the forces usually leads to a bending of the body.

Effect of shear stress

• Shear stress, also called shear stress, is the ratio of the force to the area. If you apply a force F to a body with the base area A, which acts parallel to the base area, then the associated stress is F / A.


Physics - the sub-area "dynamics" simply explained

Are you one of those dynamic people who are constantly on the move? Also in the …

• If the force remains the same, the tension is smaller the larger the area. Note the similarity to pressure, which also decreases the larger the area on which a force acts. Pressure and shear stress also have the same unit N / m
  instagram viewer
  ².
• The shear stress causes bodies to be deformed, which can lead to breakage if the deformation in crystalline structures exceeds the elastic limit of the crystal lattice.

You can observe the effect of shear forces on a pile of paper. Layer about 1,000 sheets of paper on top of each other so that a cuboid is created. Place a ruler vertically next to the stack. Then align the stack. Now press against the ruler at the top without moving it at the bottom. You shear the pile that way. Keep shearing. You will reach a point where the block loses its cohesion.