摘要
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 ways of plastic deformation for sintered powder materials, it is analyzed that the discontinuousness of density induces it of normal velocity in the deformed body. In deformation energy equation the equivalent stress is the following yield strength and the discontinuous quantity of the velocity includes both it of normal and tangential. The deformation energy equation is the foundation of upper bound method. The axisymmetric extrusion deformation of sintered powder copper is analyzed by means of upper bound method and the theoretical solution is in good agreement experimental result.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2013年第6期55-59,共5页
Journal of Wuhan University of Technology
基金
国家自然科学基金面上项目(50175086)
武汉市学科带头人计划项目(200750730314)
关键词
烧结材料
塑性变形
能量方程
速度间断
上限法
sintered materials
method plastic deformation
energy equation
velocity discontinuous
upper bound
