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Column Elastic and Loading Stability Case 3C4 Formulae and Calculator

Strength Mechanics of Materials
Beam Deflections, Stress Analysis and Engineering

Column Loading and Elastic Stability Formulae and Calculator Case 3C4.

Stepped straight bar under end load P and a distributed load of maximum value p at the bottom linearly decreasing to zero at a distance a from the bottom Both ends fixed.
(a negative value for P/pa means the end load is tensile)

Both ends fixed

Preview: Column Loading and Elastic Stability Calculator Case 3C4


P = Load (force) (lbs, N);
(pa)' = Critical unit load (force per unit length), (lbs, N);
E = modulus of elasticity (force per unit area) (psi, Pa);
I = moment of inertia of cross section about central axis perpendicular to plane of buckling ( in4, mm4 )
l = Length of bar (in, mm),
K = Derived from ratios as follows (see table):
1.) a / l
2.) P / pa


(pa)' = K ( π2 E I ) / l2

(a negative value for P/pa means the end load is tensile)


Roark's Formulas for Stress and Strain, Eight Edition

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