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摘要：
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分析了钢管弯曲应力和应变,探索了最小相对弯曲半径与管的弯曲切向主应变的关系,并确定了最小相对弯曲半径的计算方法,进一步推导出分别按照材料硬化指数、延伸率和变形几何条件计算的最小相对弯曲半径公式,再通过薄壁钢管无芯弯曲试验对其进行修正。用此方法可在少量的钢管弯曲试验的基础上,精确地确定钢管弯曲的实际最小相对弯曲半径,具有较高的参考价值。
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The steel tube bending stress and strain were briefly analyzed,the relationship between the minimum relative bending radius and the tube bending tangential strains was explored,the calculation method of the minimum relative bending radius was determined,and then the calculated minimum relative bending radius formulas according to the material hardening exponent,elongation and deformation of the geometric condition were deduced respectively.It was modified further through the steel tube bending tests.This method can precisely determine the actual minimum relative bending radius based on the small amount of steel tube bending tests,which has a strong reference value.
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基金项目：
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作者简介：
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参考文献：
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[1]Tang N C.Plastic-deformation analysis in tube bending[J].International Journal of Pressure Vessels and Piping,2000,77:751-759.
[2]杨合,孙志超,林艳,等.面向21世纪的先进塑性加工技术与管成形研究发展[J].塑性工程学报,2001,8(4):86-88.
[3]鄂大辛,宁汝新,唐承统,等.壁厚变形对弯管最小弯曲半径的影响[J].锻压技术,2006,31(1):90-93.
[4]鄂大辛,宁汝新.管材无芯弯曲的最小相对弯曲半径[J].机械工程学报,2007,43(5):219-222.
[5]鄂大辛,王险峰.弯管扁平化的平面应力分析及相对弯曲半径[J].塑性工程学报,2007,14(4):25-28.
[6]王仲仁.塑性加工力学基础[M].北京:国防工业出版社,1989.
[7]鄂大辛.成形工艺与模具设计[M].北京:北京理工大学出版社,2007.
[8]王同海.管材塑性加工技术[M].北京:机械工业出版社,1998.
[9]余同希,章亮炽.塑性弯曲理论及其应用[M].北京:科学出版社,1992.
[10]林艳,杨合,李恒,等.薄壁管数控弯曲过程中失稳起皱的主要影响因素[J].航空学报,2003,24(15):456-461.
[11]丁大均.工程塑性力学[M].南京:东南大学出版社,2007.
[12]胡正寰,夏巨谌.中国材料工程大典:第20卷材料塑性成形工程(上)[M].北京:化学工业出版社,2006.
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