Editing Compressive strength (section)

==== Geometric extrapolation ====

[[File:Illustration of Extrapolation.jpg|300px|thumb]]As shown in the section on [[#Correction formulas|correction formulas]], as the length of test specimens is increased and their aspect ratio approaches zero (<math>d_o/l_o\longrightarrow 0</math>), the compressive stresses (σ) approach the true value (σ′). However, conducting tests with excessively long specimens is impractical, as they would fail by [[buckling]] before reaching the material's true compressive strength. To overcome this, a series of tests can be conducted using specimens with varying aspect ratios, and the true compressive strength can then be determined through extrapolation.<ref name=":0" />

{{anchor|Finite element analysis}}