固体颗粒介质的侧压力预测模型及实验  

Prediction model and experiment of lateral pressure of solid granular media

作　　者：刘骥飞 郭俊卿[1,2] 相楠 陈拂晓 侯成龙[1,2] 张文雅 LIU Ji-fei;GUO Jun-qing;XIANG Nan;CHEN Fu-xiao;HOU Cheng-long;ZHANG Wen-ya(School of Materials Science&Engineering,Henan University of Science and Technology,Luoyang 471023,China;Collaborative Innovation Center of Nonferrous Metals of Henan Province,Luoyang 471023,China)

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471023 [2]有色金属共性技术河南省协同创新中心,河南洛阳471023

出　　处：《塑性工程学报》2022年第5期191-195,共5页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(51905156);河南省高等学校重点项目(20A46001490)。

摘　　要：为探究胀形过程中管材的受力分布情况,基于散体力学侧压系数理论并依据颗粒自重下的侧压力模型将侧压力Janssen公式转变为压应力压缩状态下的侧压力模型,经过单轴压缩实验验证了模型的准确性。结果表明:侧压力随着传压深度、颗粒直径和颗粒摩擦角的增大呈现指数下降,随着压头压力的升高呈现线性升高。在90 MPa高压下,筒壁深度小于50 mm时,侧压力理论预测值出现较小偏差,其原因在于高压状态下颗粒与筒壁间的摩擦因数升高,颗粒结块导致流动性降低。为胀形中管材的受力研究提供了理论基础。To investigate the force distribution of tube during bulging process,based on the theory of bulk mechanical lateral pressure coefficient and the lateral pressure model under particle weight of grannlar,the Janssen formula of lateral pressure was transformed to lateral pressure model under the compressive stress compression condition.The accuracy of the model was verified by uniaxial compression experiment.The results show that the lateral pressure decreases exponentially with the increase of pressure transfer depth,particle diameter and particle friction angle,and linearly increases with the increase of head pressure.With the high pressure of 90 MPa,the theoretical predicted value of lateral pressure has a small deviation when the depth of cylinder wall is less than 50 mm.The reason is that the friction factor between particles and cylinder wall increases under the high pressure and the fluidity of particles is reduced due to the agglomeration,which provides a theoretical basis for the study of the force on the tube in bulging.

关 键 词：固体颗粒介质 Janssen公式 侧压力模型 胀形 

分 类 号：TG115.5[金属学及工艺—物理冶金]