散体颗粒介质兼有固体和液体的形态而又表现出不同于二者的诸多奇异性质，固体颗粒介质成形工艺正是利用这种特性将固体颗粒作为传力介质成功应用于金属板管材成形中并取得良好效果。为了探讨颗粒介质在固体颗粒介质成形工艺中的传压规律，并研究散体颗粒介质在承受压力条件下的传力特性，实现对成形中金属管板材内表面压力分布的准确控制从而有效提高金属管板材成形性能，通过设计固体颗粒介质的单轴压缩试验，得到颗粒介质侧压分布规律，在此基础上，结合非局部摩擦理论建立精确的颗粒介质传压力学模型，得到基于非局部摩擦理论的颗粒介质传压规律，并推导出其轴向传力压力函数表达式。研究结果表明：侧压力与传力距离按照二次函数的规律分布，并随着传力距离增加而下降;颗粒介质轴向传递压力随传力距离增加而逐渐衰减，并且考虑非局部摩擦所得到的理论值较局部摩擦更能接近试验值，而非局部作用接触面半径对结果影响较小。

As a discrete material,the granules medium shows some characteristics same with solid and liquid,other than that,it also has some unique characteristics. Just for that,the solid granule medium forming(SGMF) technology applies the solid granules as force-transmitting medium in the tube and sheet metal forming and has made some progresses. To improve the formability of tube and sheet metal,it is very important to give a control of the pressure distribution in inner surface,the force-transmitting characteristics of granules medium under high temperature is first studied. With a self-design uniaxial compression of solid granule medium,the distribution law of lateral pressures has been gained,and in combination with the nonlocal friction theory,an accurate force-transmitting model of granules medium has been built. Under this model,not only the force-transmitting law of granules medium based on nonlocal friction theory can be got but also the functional expression of axial transfer pressure can be deduced. The research result shows that: the lateral pressures of granules medium decreases regularly with the increase of force-transmitting distance,and they present a quadratic function relation. Also the axial transfer pressure of granules medium gradually decays with the increase of force-transmitting distance,and the theoretical value which has been got by considering non-local friction is closer to the experimental one than that has been got by local friction,while the radius of non-local friction area has less influence on the result.