Sensitivity Analysis of Springback to Material Parameters in High Strength 21-6-9 Stainless Steel Tube NC Bending

doi:10.7652/xjtuxb201503021

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Sensitivity Analysis of Springback to Material Parameters in High Strength 21-6-9 Stainless Steel Tube NC Bending

更新时间：2025-07-09

- Sensitivity Analysis of Springback to Material Parameters in High Strength 21-6-9 Stainless Steel Tube NC Bending
- Vol. 49, Issue 3, Pages: 136-142(2015)
- 作者机构：
  
  南京航空航天大学材料科学与技术学院,南京,211106
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201503021
  CLC： TG386
- Online First：10 March 2015，
  
  Published：2015
- 稿件说明：
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Sensitivity Analysis of Springback to Material Parameters in High Strength 21-6-9 Stainless Steel Tube NC Bending[J]. 2015, 49(3): 136-142.
DOI：

Sensitivity Analysis of Springback to Material Parameters in High Strength 21-6-9 Stainless Steel Tube NC Bending[J]. 2015, 49(3): 136-142. DOI： 10.7652/xjtuxb201503021.

摘要

为了研究材料参数波动对21-6-9高强不锈钢管数控弯曲回弹的影响

结合多因素敏感性分析方法和弯曲-回弹全过程有限元模型

建立了高强不锈钢管弯曲回弹敏感性分析系统模型

并采用该模型研究了高强不锈钢管数控弯曲回弹对材料参数的敏感性。结果表明:回弹半径对材料参数的敏感性大于回弹角对材料参数的敏感性; 强度系数是影响高强不锈钢管弯曲回弹最敏感的因素

其次分别为弹性模量、屈服强度、硬化指数和泊松比。通过研究还获得了各材料参数对回弹角和回弹半径的敏感性因子以及当各材料参数的输入值与实际值存在15%的误差时而引起回弹角和回弹半径的相对误差值。研究结果在优化试验方案以及提高弯管回弹预测能力等方面具有重要的作用。

Abstract

To investigate the effects of the material parameters variation on springback of high strength 21-6-9 stainless steel tube in NC bending

a sensitivity analysis model of the springback is established by combining the multi-parameter sensitivity analysis method and the finite element model of whole bend-springback process

and the sensitivities of springback to the material parameters are analyzed with the proposed model. The results show that the sensitivity of springback radius to material parameters is greater than that of springback angle. The most effective parameter on the springback is the strength coefficient

followed are elastic modulus

yield stress

strain hardening exponent

and Poisson's ratio. The sensitive factors of springback angle and springback radius to the material parameters are obtained

and the relative errors of springback angle and springback radius caused by the 15% error between input value and actual value of the material parameters are also obtained. The research results may play an important role in optimizing test scheme and improving the ability of bent tube springback prediction.

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Keywords

references

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