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C

Core of the cross-section

is the central part of the cross-section, in which or at its limit, the application of compressive force, causes only compressive stresses at all points of the cross-section

D

Deflection

 is measured from the original neutral surface to the neutral surface of the deformed beam

Deformation

 is a measure of how much an object deforms from its original dimensions or size in a given direction. Depending on which deformation you measure, you can calculate different types of strain.

Durability

is the property of the structure to save its strength, stiffness and stability during the exploitation time

E

Elasticity

 is the ability of a body to resist a distorting influence and to return to its original size and shape, when that influence or force is removed.

Euler Buckling Load

When a column is loaded axially in compression, it is possible for it to become unstable before the material reaches its yield point. This load is termed the 'buckling load' or often the 'Euler buckling load' and is described by Pcr = pi2 * E I / L2.

F

Factor Of Safety

is the ratio of the breaking strength of the material to the load imposed upon it, under usual conditions.

First moment of an element of area

 is given bу the product of the area of the element and the perpendicular distance between the element and the axis

G

Gage Length

is the initial distance between two points that a measurement is being taken. As the test proceeds, this distance will change but the original distance will always be the same and this is what is used when computing strain.

H

Hooke's Law

When the applied force is proportional to the deflection, a material is said to obey Hooke's law. There is a linear relationship between the force and displacement and thus, linear elastic materials obey this law.

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