铝合金管弯曲成形表面粗化宏细观耦合建模仿真

doi:10.3901/JME.2021.22.209

机械工程学报 ›› 2021, Vol. 57 ›› Issue (22): 209-217.doi: 10.3901/JME.2021.22.209

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铝合金管弯曲成形表面粗化宏细观耦合建模仿真

郭晓曦, 李恒, 冯振勇, 张铎

西北工业大学凝固技术国家重点实验室西安 710072

收稿日期:2020-11-25 修回日期:2021-07-21 出版日期:2021-11-20 发布日期:2022-02-28
通讯作者: 李恒(通信作者),男,1977年出生,博士,教授,博士研究生导师。主要研究方向为高性能构件精确塑性成形设计制造理论和技术,主要包括塑性变形宏微观失稳缺陷预测控制、成形服役全过程多尺度多能场仿真优化、高性能复杂板/管类构件精确高效成形制造、超高服役/极端尺寸构件精确塑性成形制造等。E-mail:liheng@nwpu.edu.cn
作者简介:郭晓曦,男,1996年出生,硕士研究生。主要研究方向为跨尺度构件精确成形。E-mail:guoxiaoxi@mail.nwpu.edu.cn
基金资助:
国家自然科学基金重点（51835011）和国家优秀青年科学基金（51522509）资助项目。

Macro-meso Scale Coupling Modeling and Simulation of Surface Roughening in Aluminum Alloy Tube Bending

GUO Xiaoxi, LI Heng, FENG Zhenyong, ZHANG Duo

State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072

Received:2020-11-25 Revised:2021-07-21 Online:2021-11-20 Published:2022-02-28

摘要/Abstract

摘要： 铝合金管弯曲成形中的表面粗化缺陷严重影响了其表面质量和使役性能，迫切需要探明该成形过程中的表面粗化形成规律以避免此类缺陷的产生。管材弯曲成形宏观有限元模型无法准确描述细观尺度不均匀变形导致的表面粗化行为，而细观力学模型又难以应用到具有复杂加载边界条件的实际成形过程分析。将基于Voronoi图和晶体塑性理论的代表性体积单元（Representative volume element，RVE）细观模型引入宏观有限元模型，建立了铝管弯曲三维宏细观耦合模型，模拟研究5052-O铝管在弯曲过程中的表面粗化特征，系统分析了细观材料参数对弯曲过程表面粗化行为的影响规律。结果表明，晶粒尺寸越小，晶粒内部与晶界附近的应变差值越小，其变形越均匀，能获得越小的表面粗糙度；对于Cube织构和随机织构混合的模型，随着Cube织构含量的增多，弯曲变形后表面粗糙度呈下降趋势；织构分布与加载方式耦合影响表面粗化行为。

关键词: 铝合金管, 弯曲成形, 表面粗化, 晶体塑性有限元, 宏细观耦合建模

Abstract: The conventional Arrhenius constitutive model is limited by its low accuracy in predicting flow stress. The phenomenological Arrhenius constitutive model coupling true strain is constructed for superalloy Inconel 617B. Furthermore, the BP-ANN (Back propagation-artificial neural network) constitutive model is constructed. The results show that the flow stress of the alloy is sensitive to the deformation temperature, deformation rate and true strain. The relative error (δ) of the flow stress predicted by the phenomenological model is 9.020% and the correlation coefficient (R) is 0.981 4, while the relative error of the BP-ANN model (the optimum structure is determined as 3×20×1) is only 1.527% and R reaches 0.998 9. The flow stress of Inconel 617B is more accurately predicted by the BP-ANN model. Using BP-ANN to construct constitutive model can improve the prediction accuracy, which can describe the constitutive relationship between flow stress and deformation parameters of superalloy Inconel 617B more rationally.

Key words: aluminum alloy tube, bending forming, surface roughening, crystal plasticity finite element, macro-meso scale coupling modeling

中图分类号:

TG386

郭晓曦, 李恒, 冯振勇, 张铎. 铝合金管弯曲成形表面粗化宏细观耦合建模仿真[J]. 机械工程学报, 2021, 57(22): 209-217.

GUO Xiaoxi, LI Heng, FENG Zhenyong, ZHANG Duo. Macro-meso Scale Coupling Modeling and Simulation of Surface Roughening in Aluminum Alloy Tube Bending[J]. Journal of Mechanical Engineering, 2021, 57(22): 209-217.

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铝合金管弯曲成形表面粗化宏细观耦合建模仿真

Macro-meso Scale Coupling Modeling and Simulation of Surface Roughening in Aluminum Alloy Tube Bending

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