LAWS OF COULOMB FRICTION
The friction, that exists between two surfaces which are not lubricated, is known as solid friction. The two surfaces may be at rest or one of the surface is moving…
Strengths of Materials in Mechanical Engineering
When we looked at our statics example a few Topics ago, it was convenient to consider the bridge beam as being perfectly rigid. In the real world, a bridge beam is…
Modulus of Elasticity
When you think of elastic, you most likely think about the stuff that allows you to put your underwear on and helps it stay riding around your midsection. In the…
The Centrifugal Clutch and Metal Fatigue
When I’m under a lot of stress I sometimes have the nervous habit of grabbing a paper clip, straightening out the bends, then repetitively bending it back and forth. Eventually the…
Strain Energy
When force is applied to a structural member, that member deforms and stores potential energy, just like a spring. The strain energy (i.e. the amount of potential energy stored due…
Density and atom packing
Definition and measurement. Density is mass per unit volume. It is measured in kg/m3. The density of a sample with a regular shape can be determined using precision mass balances and accurate…
Relation between Young Modulus, Bulk Modulus and Modulus of Rigidity
Here we learn about relation between Young Modulus, Bulk Modulus and Modulus of Rigidity. All of these are elastic constant which are used to design any machinery part or…
Stress and Types of Stresses.
Stress: "When a body is subjected to some external force, there is some resistive force generated per unit area, This resistive force generated per unit area is known as 'Stress'." Mathematically is…
ELASTICITY AND ELASTIC LIMIT.
Elasticity " When a body is subjected to an external force, the body tends to undergo some deflection. When the external force is removed, the body regains it's original position. Such a body…
Hooke’s Law
Hooke’s Law states that the strain of the material is proportional to the applied stress within the elastic limit of that material. When the elastic materials are stretched, the atoms and molecules…
