通过三维有限元方法来研究单轴拉伸情况下,含圆孔有限厚度板的圆孔边缘附近的弹塑性应力场,直观地分析了三维弹塑性含圆孔板的塑性区分布和应力分布;同时找出了离面约束系数Tz和应力集中系数Kt随不同板厚的变化规律,并将其与弹性状态和平面状态做了对比说明了其独有的特征。 The three-dimensional finite element method is used to study the elastic-plastic stress field near the circular hole edge of a finite thickness plate with circular holes under uniaxial tension. The plastic zone distribution and stress distribution of the three-dimensional elastoplastic circular plate are analyzed visually. At the same time, the variation rules of the surface restraint coefficient Tz and the stress concentration coefficient Kt with different thickness were found, and its unique characteristics were compared with the elastic state and the plane state.