Analysis of tangential curve equation describing mechanical behaviour of rapeseeds (Brassica napus L.) mixture under compression loading

Abstract

The analysis of tangential curve equation for describing mechanical behaviour of rapeseeds (Brassica napus L.) mixture under compression loading were discussed. Parameters considered in this study include both measured and theoretical amounts of deformation, volume compression and deformation energy. The measured amounts denoted as true deformation, true volume compression and true deformation energy were determined directly from the compression test of the rapeseeds pressed mixture whiles the theoretical amounts expressed as max. deformation, max. volume compression and max. deformation energy were determined by mathematical adjustment of the general tangent curve equation which were verified from the measured data. Also the theoretical amounts further explain the limit deformation, limit volume compression and relationship between strains and limit volume compressions which were statistically analysed to describe true situation of pressing. The results indicate that the tangent curve equation by mathematical modification can be used to determine accurately theoretical amounts of maximal deformation, maximal volume compression and maximal deformation energy.