圆柱体在普通平板间镦粗时应力场的数值模拟。基于平衡方程及塑性条件，应用刚塑性力学模型，以实际试件的外形作为边界条件而解决了问题，求出了原高径比Ｈ。／Ｄ０＝２．３３的圆柱体在压下率为１５％～５０％情况下的内部应力场。这与物理模拟定性试验吻会，且进一步证明与完善了刚塑性力学模型的拉应力理论 Numerical simulation of stress field of upset cylinder in normal slab. Based on the equilibrium equation and the plastic condition, the rigid-plastic mechanics model is used to solve the problem with the shape of the actual specimen as the boundary condition, and the original height-diameter ratio H is obtained. /D0=2.33 cylinder in the reduction of 15% to 50% of the case of internal stress field. This is a qualitative test with the physical simulation kiss, and further proof and perfect the rigid plastic mechanical model of the theory of tensile stress