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摘要：
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板料在弯曲过程中,由于存在弹性变形,卸载后,弹性变形必然影响到板料的回弹。传统理论在分析回弹时,没有考虑应变中性层内移对回弹的影响。本文根据弹塑性弯曲理论,在考虑硬化和各向异性的条件下,通过对宽板弯曲应力应变分析,推导出了回弹角的近似计算公式,并讨论了中性层的内移对回弹的影响。
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There exists the elastic deformation during the process of sheet bending,and it will influence the springback of sheet after unloading.Traditional theory has not considered the influence of the neutral layer inside displacement on bending springback when analyzing the springback.According to the elasto-plasticity bending theory,an approximate calculation formula of springback angle was educed and the influence of neutral layer inside displacement to bending springback was discussed through analyzing the stress-strain of wide sheet bending considering the hardening and aeolotropic condition.
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基金项目：
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河北省自然科学基金资助项目(No.501215);;
燕山大学博士基金资助项目(No.B152)
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作者简介：
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参考文献：
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[1]梁炳文,胡世光.板料成形塑性理论[M].北京:机械工业出版社,1987.
[2]汪大年.金属塑性成形原理[M].北京:机械工业出版社,1993.
[3]肖景容,姜奎华.冲压工艺学[M].北京:机械工业出版社,1994.
[4]胡世光.板料冷压成形原理[M].北京:机械工业出版社,1979.
[5]斯德洛日夫M B,波波夫E A.金属压力加工原理[M].北京:机械工业出版社,1984.
[6]官英平.板料弯曲减薄系数的计算[J].锻压技术,2000,25(3):13~14.
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