๐Subject:-
Strength of Material
โญ๏ธImp. One liners:-
โ๏ธEndurance 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...
โ๏ธDuctility:-
Amount by which material can be Drawn out in tension before fracture.
โ๏ธMalleability:-
Ability of Material to be deformed or spread into different directions.
This is usually caused by Compressive forces during Rolling,Pressing & Hammering.
โ๏ธCreep:-
Material undergoes additional deformation with passage of time under sustained loading within Elastic limit.
โ๏ธFatigue:-
Deterioration of a material under repeated cycles of Stress or Strain resulting in progressive cracking that eventually produces fracture.
โ๏ธTenacity:-
Property to resist fracture under action of Tensile load.
โ๏ธToughness:-
Ability to absorb Mechanical energy upto failure.
โ๏ธHardness:-
Ability to resist scratch or abrasion.
โ๏ธ Resilience:-
Property to absorb energy when it is deformed elastically and then upon unloading to have this energy recovered.
โ๏ธHooke's Law:-
Stress is proportional to Strain
(with in proportional limit).
โญ๏ธNote:-
๐ถStress,Strain & Moment of Inertia is Neither Scalar,
nor vector but it's a Tensor Quantity..
๐ทStress is dependent..
๐ถStrain is independent..
โ๏ธShear Force at a section is the resultant of all transverse forces to the right or left of section.
โ๏ธBending Moment is the resultant moment at the Section due to all transverse forces to the left or right of section.
๐ฅShear Force is different on either side of concentrated load...
๐ฅBending Moment remains the same on either side of concentrated load..
โ๏ธThe slope of the bending moment diagram is equal to the Shear Force.
โ๏ธThe slope of the Shear Force diagram is equal to the Load Intensity
โ๏ธThe second derivative of the Deflection is equal to the Curvature.
โ๏ธPoint of Contraflexure:-
Point where BMD changes sign.
(BMD=0 at this section)
โ๏ธPoint of Inflection:-
Point where deflected shape changes Curvature.
(BMD=0 at this section)
๐ฅIf 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
๐ฅ๐ฅ @IESCIVIL ๐ฅ๐ฅ
Strength of Material
โญ๏ธImp. One liners:-
โ๏ธEndurance 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...
โ๏ธDuctility:-
Amount by which material can be Drawn out in tension before fracture.
โ๏ธMalleability:-
Ability of Material to be deformed or spread into different directions.
This is usually caused by Compressive forces during Rolling,Pressing & Hammering.
โ๏ธCreep:-
Material undergoes additional deformation with passage of time under sustained loading within Elastic limit.
โ๏ธFatigue:-
Deterioration of a material under repeated cycles of Stress or Strain resulting in progressive cracking that eventually produces fracture.
โ๏ธTenacity:-
Property to resist fracture under action of Tensile load.
โ๏ธToughness:-
Ability to absorb Mechanical energy upto failure.
โ๏ธHardness:-
Ability to resist scratch or abrasion.
โ๏ธ Resilience:-
Property to absorb energy when it is deformed elastically and then upon unloading to have this energy recovered.
โ๏ธHooke's Law:-
Stress is proportional to Strain
(with in proportional limit).
โญ๏ธNote:-
๐ถStress,Strain & Moment of Inertia is Neither Scalar,
nor vector but it's a Tensor Quantity..
๐ทStress is dependent..
๐ถStrain is independent..
โ๏ธShear Force at a section is the resultant of all transverse forces to the right or left of section.
โ๏ธBending Moment is the resultant moment at the Section due to all transverse forces to the left or right of section.
๐ฅShear Force is different on either side of concentrated load...
๐ฅBending Moment remains the same on either side of concentrated load..
โ๏ธThe slope of the bending moment diagram is equal to the Shear Force.
โ๏ธThe slope of the Shear Force diagram is equal to the Load Intensity
โ๏ธThe second derivative of the Deflection is equal to the Curvature.
โ๏ธPoint of Contraflexure:-
Point where BMD changes sign.
(BMD=0 at this section)
โ๏ธPoint of Inflection:-
Point where deflected shape changes Curvature.
(BMD=0 at this section)
๐ฅIf 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
๐ฅ๐ฅ @IESCIVIL ๐ฅ๐ฅ
![๐๐๐๐๐๐๐ ๐.๐
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