以平均半径为塑性区半径时自增强问题的研究

基于第四强度理论,分析了以圆筒内、外半径的算术平均值和几何平均值为塑性区深度的自增强问题,包括这两种情况下的塑性区深度问题及其对自增强压力与承载能力的影响;得出了以算术平均值与几何平均值确定塑性区半径时,不发生压缩屈服的最大径比,并比较了二者的大小;对以算术平均值和几何平均值作为塑性区半径时所得的自增强压力、承载能力与全屈服压力进行了分析比较;以解析与图像两种方式研究了自增强理论的各参量间的依赖关系和变化规律.

On Autofrettage When Mean Radius as the Radius of the Plastic Zone

The plastic depth and load-bearing capacity of the autofrettaged pressure vessel are studied when the arithmetic mean radius and geometric mean radius are taken as the radius of the plastic zone.respectively.The maximum radius ratios where no compressive yield occurs are presented and compared when the arithmetic mean radius and geometric mean radius are taken as the radius of the plastic zone,respectively.Comparison is made between autofrettage pressures,load-beating capacities and entire yield loadings of the two cases that the arithmetic mean radius is taken as the radius of the plastic zone and the geometric mean radius is taken as the radius of the plastic zone.Relations and laws of parameters in autofrettage theory are studied in analytic and graphic methods.