Main Question or Discussion Point
Hi guys. Just out of curiosity I want to know that why the concept of stress evolved? Why do we need stress?
To make lazy students work and explain what they mean?Why do we need stress?
Instead of looking at it as force per unit area, look at it as force per molecule. Stress is useful to determine how strong a material is. When a part breaks under a certain force, we actually break the molecular bonds between the particles. The greater the area of the fracture, the higher the number of molecules, the greater the force needed.stress is a measure of the internal forces acting within a deformable body.
How does that make it hypothetical? Considering the definition of the word, it doesn't make any sense to me.Hi AlephZero...
I think stress as a hypothetical quantity because we can't see or directly measure it!!
On the other hand we can see/measure strain.