Effect of temperature on compressibility of rubbed korshinsk peashrub

Compressibility of rubbed korshinsk peashrub has great effect on designing compressing equipments and making choice of processing technologies of rubbed korshinsk peashrub. Based on the compressibility experiment of rubbed korshinsk peashrub at different temperatures ranging from 22℃ to 140℃, the mathematical models were established which could explain the relationships between the pressure and volumetric strain, the pressure and compressed density as well as the bulk modulus and compressed density, and the effect of temperature on the compressibility of rubbed korshinsk peashrub was obtained. The results showed that the rubbed korshinsk peashrub experienced three stages of being loose, transitional and tight during the process of compression. At the first stage, its compressibility was better, but the compressibility began to decrease gradually at the transitional stage and decreased sharply at the stage of being tight. Meanwhile, the study also showed that the temperature had an impact on compressibility of rubbed korshinsk peashrub. Its compressibility increased with increasing temperature in the above-mentioned range, and the effect of temperature on compressibility became more obvious as the compressed density increased. The results provide references for designing compressing equipments and making reasonable choice of processing technologies of korshinsk peashrub.