Mechanical properties commonly used by engineers are
Ultimate
tensile strength
Tensile
yield strength
Elongation
Modulus
of elasticity
Compressive
strength
Shear
strength
Endurance
limit
Ultimate
Tensile Strength (UTS)
The maximum load per unit of original
cross-sectional area sustained by a material during a tension test.
Tensile
Yield Strength (TS)
The stress
corresponding to some permanent deformation from the modulus slope, e.g., 0.2
percent offset in the case of heat treated alloy steels.
Elongation
(E)
The amount of permanent extension in a ruptured
tensile test specimen; it is usually expressed as a percentage of the original
gage length. Elongation is usually taken as a measure of ductility.
Modulus
of Elasticity
The property of a material which indicates its
rigidity, this property is the ratio of stress to strain within the elastic
range.
Compressive
Strength
The maximum compressive stress that a material is
capable of developing based on the original cross-sectional area. The general
design practice is to assume the compressive strength of steel is equal to its
tensile strength, although it is actually somewhat greater.
Shear
Strength
The stress required producing fracture in the plane
of cross section, the conditions of loading being such that the directions of
force and of resistance are parallel and opposite although their paths are
offset a specified minimum amount. The ultimate shear strength is generally
assumed to be three fourths the material’s ultimate tensile strength.
Endurance
Limit
The maximum stress to which the material can be
subjected for an indefinite service life,
although the standards vary for various types of members and different
industries, it is common practice to assume that carrying a certain load for
several million cycles of stress reversals indicates that the load can be
carried for an indefinite time.
Comments
Post a Comment