SEC Past Boards Flashcards
Limit beyond which the material will no longer go back to it’s original shape when load is removed.
Elastic Limit
Maximum Stress that may be develop such that there is no permanent or residual deformation when load is entirely removed.
Elastic Limit
Point at which the material will have an appreciable elongation or yielding without any increase of load.
Yield Point
Maximum ordinate in Stress-Strain diagram in the U.S. Also called as Tensile Strength.
Ultimate Strength
Strength of Material at Rapture.
Also called Breaking Strength.
Rapture Strength
Ability of material to absorb energy without creating a permanent distortion.
Resilience
Ability of material to absorb energy without causing it to break.
Toughness
Actual stress of material under a given loading.
Working Stress
Maximum safe stress that a material can carry.
Allowable Stress
Ratio of ultimate of tensile strength to allowable strength.
Factor of Safety
Occurs at point of zero shear.
Maximum Moment
For beams loaded with concentrated load, usually occur under a concentrated load and so the maximum moment.
Point of zero shear
The ability of the material to absorb energy in the elastic range.
Resilience
The term which refers to the ability of a material to reform in the plastic range without breaking.
Ductility
The material composition is the same but it’s mechanical properties are different in every direction.
Orthotropic Material
Refers to the tendency of solid materials to return to their original shape after being force are applied to them. When the forces are removed, the object will return to its initial shape and size.
Elasticity
Refers to the stress at which a material begins to deform plastically.
Yielding
It is the point through which the resultant of the resistance to the applied lateral force acts.
Center of rigidity
The point of structure where the resultant vertical force acts.
Center of mass
The distance between the center of mass and center of rigidity.
Eccentricity
What can be measured by seismometer?
Ground Displacement
Refers to the flexibility of a structural system.
Inverse of Stiffness
The portion of the stress-strain curve beyond which the stress is no longer proportional to the strain.
Proportional Limit
Materials having the same composition at any point.
Homogeneous
Material property which enables it to under large permanent strains before failure.
Ductility
Forces generated by bodies in motion.
Dynamic
A time-dependent prestress loss in pretensioned concrete.
Relaxation
Tendons are stressed before concrete is poured.
Pre-tensioning
Tendons are stressed after concrete has hardened.
Post-tensioning
The ability of a deformed material body to return to its original shape and size when the forces causing the deformation are removed.
Elasticity
The ability of the material to deform under tensile stress.
Ductility
The ability of material to absorb energy when it is deformed elastically, and release that energy upon unloading.
Resilience
The ability of a material to absorb energy and plastically deform without fracturing.
Toughness
A material having the same strength at any point.
Homogeneous
