Neutral Axis

Also found in: Dictionary, Acronyms, Wikipedia.

neutral axis

[′nü·trəl ′ak·səs]
In a beam bent downward, the line of zero stress below which all fibers are in tension and above which they are in compression.

Axis, Neutral


(in strength of materials), for a beam that undergoes bending, a line in a cross section of the beam such that at all points of the line the normal stresses parallel to the axis of the beam are equal to zero. The neutral axis divides the cross section into two parts: the normal stresses are tensile in one part and compressive in the other. If ab (see Figure 1)—the line through which the plane of action of the external forces passes—is one of the principal axes of inertia for the cross section shown in Figure 1, then the neutral axis mn will be the second principal axis. The locus of all the neutral axes forms the neutral surface of a beam.

Figure 1

neutral axis

An imaginary line in a beam, shaft, or other member, subjected to bending, where there is no tension or compression and where no deformation takes place.
References in periodicals archive ?
x]--static moment of inertia of cross sectional area dF of about the neutral axis x:
In order to obtain neutral axis distance x and cross section secondary moment I, the sheets were assumed to be in complete junction.
Y/T ratio from neutral axis weld location wasn't measured because it is not required in the specification.
The orientation of the glenoid using the novel software tool was corrected closer to the neutral axis than what was found in the initial placement study using the preliminary software tool (3.
For a rectangular cross section, the neutral axis is located at half the local bar thickness.
The position of the neutral axis is once again calculated by the equilibrium of the internal forces.
Examine a joist in cross-section, and you will find a point at which the compressive force ends and tensile stress begins, this point is called the neutral axis.
Twenty-four specimens contained concentric strands (strands centered at the neutral axis of the specimen).
The analysis supports user input of the moment of inertia, neutral axis distance, contact point distance and total span as variables.
s], c is neutral axis depth, and tensile strength of steel fiber reinforced concrete can be calculated using