Strength of Materials One Liner statement

 Strength of Material

⭐️Imp. One liners:-

❇️Endurance Limit:

The stress level below which  a material has high probability of not failing under reversal of Stress is known as Endurance limit...

OR

The stress level at which a material fractures under large no. Of reversals of Stress is called as Endurance Limit...

❇️Ductility:-

Amount by which material can be Drawn out in tension before fracture.

❇️Malleability:-

Ability of Material to be deformed or spread into different directions.

This is usually caused by Compressive forces during Rolling,Pressing & Hammering.

❇️Creep:-

Material undergoes additional deformation with passage of time under sustained loading within Elastic limit.

❇️Fatigue:-

Deterioration of a material under repeated cycles of Stress or Strain resulting in progressive cracking that eventually produces fracture.

❇️Tenacity:-

Property to resist fracture under action of Tensile load.

❇️Toughness:-

Ability to absorb Mechanical energy upto failure.

❇️Hardness:-

Ability to resist scratch or abrasion.

❇️ Resilience:-

Property to absorb energy whe it is deformed elastically and then upon unloading to have this energy recovered.

❇️Hooke's Law:-

Stress is proportional to Strain

(with in proportional limit).

⭐️Note:-

🔶Stress,Strain & Moment of Inertia is Neither Scalar,

nor vector but it's a Tensor Quantity..

🔷Stress is dependent..

🔶Strain is independent..

❇️Shear Force at a section is the resultant of all transverse forces to the right or left of section.

❇️Bending Moment is the resultant moment at the Section due to all transverse forces to the left or right of section.

💥Shear Force is different on either side of concentrated load...

💥Bending Moment remains the same on either side of concentrated load..

❇️The slope of the bending moment diagram is equal to the Shear Force.

❇️The slope of the Shear Force diagram is equal to the Load Intensity

❇️The second derivative of the Deflection is equal to the Curvature.

❇️Point of Contraflexure:-

Point where BMD changes sign.

(BMD=0 at this section)

❇️Point of Inflection:-

Point where deflected shape changes Curvature.

(BMD=0 at this section)

💥If the Shear Force at a section of a beam under bending is equal to zero,then the Bending Moment at the Section is :-

Maximum Or Minimum