Question

1. name the 3 possible types of internal forces/stresses:

a) ____________ - stress that tends to stretch or lengthen the material
b) ____________ - stress that tends to compress or shorten the material
c) ____________ - stress that tends to shear the material

Explanation:

• Tensile stress: When a force acts to stretch or lengthen a material, the internal resistance per unit area is tensile stress. For example, when you pull on a rubber band, the rubber band experiences tensile stress.
• Compressive stress: Occurs when a force acts to compress or shorten a material. A column supporting a heavy load in a building experiences compressive stress as the load tries to compress the column.
• Shear stress: Happens when forces act parallel to each other but in opposite directions on different parts of a material, tending to cause one part of the material to slide over another. An example is when you cut a piece of paper with scissors; the paper experiences shear stress.

Answer:

a) Tensile stress
b) Compressive stress
c) Shear stress