A physical deformation phenomenon occurring during the axial compression of a cylindrical test specimen or workpiece. Friction at the contact surfaces restricts lateral expansion at the ends, causing the material to bulge outward in the middle like a barrel. Engineers monitor this during forging operations or compression testing to evaluate material flow and friction conditions.
Heard on the job
The compression test showed severe barreling before yielding, so we need to add more lubricant to the platens.
Insider tip
Using PTFE pads or specialized lubricants during a compression test minimizes end friction and delays barreling, giving a truer stress-strain curve.
Also heard as
- barrelling