Chapter 4 Flashcards
Mechanical Properties
How materials respond when forces are applied. How it deforms. Crush, bend, break
Physical Properties
How materials react to environmental influences
Physical Weight
Density
P
Amount of mass in a unit volume kg/m^3
The tension (comprehensive) applied or external forces
Force Intensity
Stress
O = internal distribution of forces within a body that balances and react to the loads applied to it or stress
Tensile + compressive stress
Occurs parallel to the axis or axial stress that stretch shorter or bonds
Shear stress
Occurs perpendicular to the axis. Stress tends to produce cutting
Strain
E = ^L / L
Change in the form or shape of a material which is subjected to an external force
^L
Length of material after external force (transformed length or deformation)
L
Length of material prior to the subjection of an external force (original length)
Modulous of Elasticity
E
Measurement of how stiff materials are
Linearly plastic
Plastic Range
Replaces the elastic range in which large deformation happens without the stress increasing significantly
Linearly plastic
Ductile
Materials that experience large plastic deformations, which it unduly stress will deform significantly before they reach ultimate stress (break point)
Linearly non plastic range
Brittle
Materials that show no significant plastic range when stressed
Elastic to plastic
Yield stress
The point at which the materials property from its elastic range to its plates
