Stress and pressure are the two important terms used frequently in the science and technology. Though they give same meaning, there are unique characteristics for each term. Pressure is defines as the amount of force applied per unit area.Stress is the amount of force per unit area experienced by a material.Although both have same units of newton/meter^2, they are different only in their context.
1. Pressure represents intensity of external forces acting at a point. but stress represent intensity of internal resisting forces develop at a point.
2. Pressure always acts normal to the surface. but but stress may also act either normal or parallel to the surface.
3. Magnitude of pressure at a point in all direction remain same. but magnitude of stress at a point in all the direction are unequal.
4. Pressure can be measured by using measuring device.like pressure gauge. but stress can't be measured directly by using any device.
Major Differences are:
1. Pressure represents intensity of external forces acting at a point. but stress represent intensity of internal resisting forces develop at a point.
2. Pressure always acts normal to the surface. but but stress may also act either normal or parallel to the surface.
3. Magnitude of pressure at a point in all direction remain same. but magnitude of stress at a point in all the direction are unequal.
4. Pressure can be measured by using measuring device.like pressure gauge. but stress can't be measured directly by using any device.
very good
ReplyDeletepoint4 - something is mixed
ReplyDelete#4 needs more details. You can measure strain in a material that then can be used to calculate stress. While not directly measured, saying this sentence can leave people to believe that its not possible or incredibly difficult.
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