Deformation of Solids Flashcards
Hooke’s Law
Up to a maximum load, the limit of proportionality, the extension of an elastic material is proportional to the applied load.
F = kx
Limit of proportionality
The point beyond which the extension of an elastic material is not proportional to the applied load
Elastic Limit
The maximum load a specimen can experience and still return to its original length when the deforming force is removed. Beyond this point, the wire is ‘plastic’ and stretches enormously before breaking.
Yield point
The load at which the internal molecular structure is permanently changed as crystal planes slide across one another.
Ultimate Tensile Strength
Max stress which can be applied to a wire without breaking.
Young Modulus
The ratio of stress to strain within the limit of proportionality.
Stress
The applied force per unit area of cross section.
Strain
The ratio of the change in the length of a specimen to its original length
