RT Journal Article T1 The ring compression test: Analysis of dimensions and canonical geometry A1 Martín-Fernández, Francisco de Sales K1 Ciencia de los materiales AB The compression ring test is universally accepted as a perfectly valid method by which determine simply and reliably the adhesion friction factor in a plastic deformation process. Its methodology is based on the application of geometric changes as both the reduction in thickness as the decrease in bore inner diameter in the strained ring itself. In this paper the performance of that test is the basis for establishing the coefficient of friction on a forging process so that, given this, its application to Upper Bound Theorem (UBT) by model Triangular Rigid Zones (TRZ), enable the establishment an intercomparison with empirical force, reaching a cuasivalidation of this Theorem in a certain range. YR 2015 FD 2015-10-13 LK http://hdl.handle.net/10630/10504 UL http://hdl.handle.net/10630/10504 LA eng NO Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech DS RIUMA. Repositorio Institucional de la Universidad de Málaga RD 20 ene 2026