A verified solution of friction factor in compression test based on its sample's shape changes

The friction factor is a key input for “barrel compression test” and meaningful interpretation of the test data. Despite its widespread use, due to complexity problem, there are very few solutions available test, let alone factor. Extended-Avitzur (EA) model has serious known limitations calculate To estimate more reliably, closed-form solution been proposed here. based on “Exponential Profile Model” (EPM) provides an instantaneous value It simply relies sample's initial deformed dimensions. Unlike existing experimental procedures, integrates results identification single set load-displacement-barreling Merits were highlighted compared those conventional Cylindrical Models (CPMs). A finite element was developed as reference produce pseudo-experimental data verify presented solution. deformation used in EPM EA factors by each compare them with benchmark. Contrary EA's estimated factors, identified good agreement values. Recommendations provided identify zone at which EPM's can be meaningfully.