Critical Evaluation of Identified Flow Curves Using Homogeneous and Heterogeneous Solutions for Compression Test

Abstract Background The cylindrical profile model (CPM) is commonly used to convert the load–displacement measurement from axis-symmetric compression test (ACT) flow curve. ignores barrelling of sample which results in serious curve distortion and underestimation effective stress strain. To minimize these, a new solution ACT with heterogeneous deformation proposed this work as an alternative CPM. Method Representative point introduced approach for better utilization solution. Some key attributes typical are also considered explore sensitivity identified deformation. Sample curves based on compared that Results It was found CPM underestimates maximum stress, strain rate. Significant deviations were between reference those unable appropriately account rate-dependent behaviour material hardening variations samples. Therefore, given its non-realistic homogeneous rate sample, questionable. provided more reliable than Conclusions Considering at centre strains bellow 0.4 closely resemble obtained finite element model. Thus, reduces limitations provides less error study hot phenomena (e.g. recovery recrystallization). Further recommendations limit