机构地区: 东北大学材料与冶金学院轧制技术及连轧自动化国家重点实验室
出 处: 《应用科学学报》 2003年第2期161-164,共4页
摘 要: 对圆形平冲头轴对称冲入半无限体问题提出以参数方程建立速度场,并以参量积分求解变形功率的新方法。得到了轴对称冲入应力状态因子的上界解析解,证明了该解略低于平面变形冲入三角形速度场的最小上界值。 A parametric equation to establish velocity field for the indentation of semi-infinite medium by a flat-round punch was proposed, and corresponding parametric integration to deformation power was performed as a new method in this paper. A minimal analytical upper-bound solution of stress state factor for the indentation was obtained. The result is shown to be lower than that of triangle velocity field for the plane-strain indentation.