圆柱面过盈连接的应力分析
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摘要
综合以往轴毂过盈连接分析中,只考虑了弹性变形的问题,在此基础上,进一步分析轴毂结构及配合过盈量对应力的影响,以及在怎样的条件下导致其发生塑性变形。根据屈瑞斯卡塑性条件,找出过盈连接由弹性变形过渡到塑性变形的条件,推导了在弹性与塑性情况下连接体内的应力计算公式,完善和丰富过盈配合的应力分析理论。计算实例分析了轴毂结构参数对许用过盈量的影响规律,并通过对毂内应力的分析,发现随着过盈量的增加,毂内塑性区变大,按弹性变形和按弹塑性变形计算的应力结果的差异变大。
In the past,only elastic deformation is considered in the stress analysis of the pressed-on joint of shaft and hub.In this paper,we further analyze the effect of shaft-hub structure and interference magnitude on the stress and the condition of plastic deformation.The condition under which the elastic deformation is transferred to plastic deformation in the pressure connection,is determined by Tresca criterion,and the stress formula of the joint body is deduced under the elastic and plastic conditions.Our work perfects and richens the stress analysis theory of the interference fit.An example is given to analyze the relationship between shaft-hub structure parameters and permitted interference magnitude;and in the stress analysis of the hub,it is found that with the increase of interference,the plastic region becomes larger and the difference between the results calculated by elastic deformation and those by elastic-plastic deformation becomes obvious.
In the past,only elastic deformation is considered in the stress analysis of the pressed-on joint of shaft and hub.In this paper,we further analyze the effect of shaft-hub structure and interference magnitude on the stress and the condition of plastic deformation.The condition under which the elastic deformation is transferred to plastic deformation in the pressure connection,is determined by Tresca criterion,and the stress formula of the joint body is deduced under the elastic and plastic conditions.Our work perfects and richens the stress analysis theory of the interference fit.An example is given to analyze the relationship between shaft-hub structure parameters and permitted interference magnitude;and in the stress analysis of the hub,it is found that with the increase of interference,the plastic region becomes larger and the difference between the results calculated by elastic deformation and those by elastic-plastic deformation becomes obvious.
引文
[1]魏延刚.轴毂过盈连接的应力分析和接触边缘效应[J].机械设计,2004,1(1)
[2]黄龙发.过盈连接的有限元分析[J].机械,2006,(8)
[3]章巧芳.轮轴过盈连接有限元分析[J].机械强度,2006,(4)
[4]曹燎原.ANSYS在过盈连接中的应用[J].现代制造工程,2005,(5)
[5]邓荣兵.轴毂过盈连接的有限元分析[J].机电工程,2005,22(1):52~54
[6]韦念龙.有限元分析软件在过盈配合连接安全核算中的应用[J].安全与环境工程,2002,9(3)
[7]邹雨.超弹性材料过盈配合的轴对称平面应力解答[J].工程力学,2004,(12)
[8]王志坚.轴毂固定连接结构的一种创新设计[J].机械设计,2005,(5)
[9]Prasad NS,Sashikant P,Ramamurti V.Stress distribution in in-terference joints[J].Journal of Composite Structure,1994,51(5):535~540
[10]刘旭华.角度偏差对过盈连接强度的影响[J].机械研究与应用,2006,(2)
[11]廖爱华.叶片机械过盈配合的接触分析[J].机械强度,2006,(2)
[12]王宗彦.复杂载荷下火车轮轴的有限元分析[J].华北工学院学报,2002,(5)
[13]Mack W,Bengeri M.The influence of the temperature depend-ence of the yield stress on the stress distribution in a thermally as-sembled elastic-plastic shrink fit[J].Acta Mechanics,1994,103(1-4):103~113
[14]Mack W,Bengeri M.Thermal assembly of an elastic-plasticshrink fit with solid inclusion[J].International Journal ofMechanical Science,1994,36(8):699~705
[15]Gamer U.The shrink fit with nonlinearly hardening elastic-plastichub[J].Transaction of ASME,1987,54:474~476
[16]Guven U.Stress distribution in shrink fit with elastic-plastic hubexhibiting variable thickness[J].International Journal of Me-chanical Science,1993,35(1):39~46
[17]Sen S,Aksakal B.Stress analysis of interference fitted shaft-hubsystem under transient heat transfer conditions[J].Materialsand Design,2004,25:407~417
[18]Zhao H.Numerical analysis of the interference fitting stresses be-tween wheel and shaft[J].International Journal of MaterialProduction Technology,1997,12(4-6):514~526
[19]Zhang Y,McClain B,Fang X D.Design of interference fits viafinite element method[J].International Journal of Mechani-cal Sciences,2000,42:1835~1850
[20]Amanan L,Krishna K R,Sriraman R.Thermo-mechanical finiteelement analysis of a rail wheel[J].International Journal ofMechanical Sciences,1999,41:487~505
[21]尹祥础.固体力学[M].北京:地震出版社,1985
[22]夏志皋.塑性力学[M].上海:同济大学出版社,1991
[2]黄龙发.过盈连接的有限元分析[J].机械,2006,(8)
[3]章巧芳.轮轴过盈连接有限元分析[J].机械强度,2006,(4)
[4]曹燎原.ANSYS在过盈连接中的应用[J].现代制造工程,2005,(5)
[5]邓荣兵.轴毂过盈连接的有限元分析[J].机电工程,2005,22(1):52~54
[6]韦念龙.有限元分析软件在过盈配合连接安全核算中的应用[J].安全与环境工程,2002,9(3)
[7]邹雨.超弹性材料过盈配合的轴对称平面应力解答[J].工程力学,2004,(12)
[8]王志坚.轴毂固定连接结构的一种创新设计[J].机械设计,2005,(5)
[9]Prasad NS,Sashikant P,Ramamurti V.Stress distribution in in-terference joints[J].Journal of Composite Structure,1994,51(5):535~540
[10]刘旭华.角度偏差对过盈连接强度的影响[J].机械研究与应用,2006,(2)
[11]廖爱华.叶片机械过盈配合的接触分析[J].机械强度,2006,(2)
[12]王宗彦.复杂载荷下火车轮轴的有限元分析[J].华北工学院学报,2002,(5)
[13]Mack W,Bengeri M.The influence of the temperature depend-ence of the yield stress on the stress distribution in a thermally as-sembled elastic-plastic shrink fit[J].Acta Mechanics,1994,103(1-4):103~113
[14]Mack W,Bengeri M.Thermal assembly of an elastic-plasticshrink fit with solid inclusion[J].International Journal ofMechanical Science,1994,36(8):699~705
[15]Gamer U.The shrink fit with nonlinearly hardening elastic-plastichub[J].Transaction of ASME,1987,54:474~476
[16]Guven U.Stress distribution in shrink fit with elastic-plastic hubexhibiting variable thickness[J].International Journal of Me-chanical Science,1993,35(1):39~46
[17]Sen S,Aksakal B.Stress analysis of interference fitted shaft-hubsystem under transient heat transfer conditions[J].Materialsand Design,2004,25:407~417
[18]Zhao H.Numerical analysis of the interference fitting stresses be-tween wheel and shaft[J].International Journal of MaterialProduction Technology,1997,12(4-6):514~526
[19]Zhang Y,McClain B,Fang X D.Design of interference fits viafinite element method[J].International Journal of Mechani-cal Sciences,2000,42:1835~1850
[20]Amanan L,Krishna K R,Sriraman R.Thermo-mechanical finiteelement analysis of a rail wheel[J].International Journal ofMechanical Sciences,1999,41:487~505
[21]尹祥础.固体力学[M].北京:地震出版社,1985
[22]夏志皋.塑性力学[M].上海:同济大学出版社,1991
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