How do you apply stress on a material, and how do you apply strain on a material? For example, when you stretch a material, is that you applying strain or stress?

Question

anonymous · Answer

Stress is a consequence of strain.

johnson · Answer

stress= force/ area  which is same as Pressure 
while Strain = extension/ original length of the material 
so i do rather tell u the stress strain graph of a material determines the elasticity of a material and the result of stres/strain curveor better still the gradient of the graph  is called the Young Modulus

mani_jha · Answer

You need to be very clear about this. Stress is an internal force - you cannot apply it, the body applies it from inside.
When you stretch a material, you create strain in it by changing its dimensions. To return to its original shape, the atoms and molecules inside the body apply a restoring force. This restoring force per unit area is known as stress.
Stress depends on Strain. It is always a result of strain, never a cause of it.
Ok?