根据烧结材料塑性变形规律,推导出密度间断将导致法向速度间断。在变形能量方程中,等效应力采用后继屈服强度,速度间断值既要考虑切向速度间断,又要考虑法向速度间断。烧结材料变形能量方程奠定了上限分析法的基础,通过上限法分析烧结材料轴对称挤压塑性变形,理论计算值与实验结果一致。 According to the plastic deformation law of sintered materials, it is deduced that the discontinuous density will lead to the discontinuity of the normal velocity. In the deformation energy equation, the equivalent stress adopts the follow-up yield strength. The discontinuous value of the velocity should consider both the tangential velocity discontinuity and the normal velocity discontinuity. The deformation energy equation of sintered material lays the foundation of the upper bound analysis method, and the plastic deformation of the sintered material is analyzed by the upper bound method. The theoretical calculated values ​​agree well with the experimental results.