薄壁管材矫直过程应变中性层偏移模型与分析

中国机械工程 ›› 2013, Vol. 24 ›› Issue (10): 1390-1395.

薄壁管材矫直过程应变中性层偏移模型与分析

张子骞1;杨会林1;田永利2

1.东北大学,沈阳,110004
2.天津大学,天津,300072

出版日期:2013-05-25 发布日期:2013-05-28
基金资助:
高等学校博士学科点专项科研基金资助项目(200801451013)
Research Fund for the Doctoral Program of Higher Education of China（No. 200801451013）

Offset Modeling and Analysis of Strain Neutral Surfaces for Straightening a Thin-walled Tube

Zhang Ziqian1;Yang Huilin1;Tian Yongli2

1.Northeastern University,Shenyang,110004;;2.Tianjin University,Tianjin,300072

Online:2013-05-25 Published:2013-05-28
Supported by:
Research Fund for the Doctoral Program of Higher Education of China（No. 200801451013）

摘要/Abstract

摘要：

为进一步揭示薄壁金属管材的矫直变形机理,基于薄壁构件弹塑性理论建立了薄壁管材矫直变形区的应力应变关系模型，进而采用解析方法建立了矫直过程中应变中性层的偏移模型,有限元分析计算证明该模型是近似准确的。对数学模型变化趋势的分析揭示了偏移量随相对反弯半径的增大而减小，随金属塑性变形能力的增强而增大,同时给出了中性层偏移模型的应用场合。

关键词: 薄壁管材, 矫直, 应变中性层, 偏移模型

Abstract:

In order to reveal the deformation mechanism of a thin-walled tube straightening,a new stress-strain model in the straightening deformation zone was found based on the elastic-plastic theory of a thin-walled member.Then,a offset model of the strain neutral surfaces was established subsequently,which was proved to be approximatively accurate by FEA analysis.Analyzing the change trend of the model,it is found that the offset value decreases with the increase of relative reverse bending radius,and it also increased with the increase of plastic deformation capacity of the metal,it is also found that how to use this
model in different situations.This research can provide the theoretical basis for studying the deformation process and the straightening mechanism of a thin-walled tube straightening deeply.

Key words: thin-walled tube, straightening, strain neutral surface, offset model

中图分类号:

TG301

张子骞1, 杨会林1, 田永利2. 薄壁管材矫直过程应变中性层偏移模型与分析[J]. 中国机械工程, 2013, 24(10): 1390-1395.

ZHANG Zi-Jian-1, YANG Hui-Lin-1, TIAN Yong-Li-2. Offset Modeling and Analysis of Strain Neutral Surfaces for Straightening a Thin-walled Tube[J]. China Mechanical Engineering, 2013, 24(10): 1390-1395.

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