中国航空学报(英文版)2024，Vol.37Issue(1) ：391-413.DOI:10.1016/j.cja.2023.05.014

Inhibiting plastic tensile instability of non-symmetric thin-walled shell component via increasing regional metal inflow based on heterogeneous pressure-carrying medium

Nan XIANG Yiquan SHU Pengyi WANG Menghan YANG Haoran WANG Tao HUANG Junqing GUO Fuxiao CHEN
中国航空学报(英文版)2024，Vol.37Issue(1) ：391-413.DOI:10.1016/j.cja.2023.05.014
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Inhibiting plastic tensile instability of non-symmetric thin-walled shell component via increasing regional metal inflow based on heterogeneous pressure-carrying medium

Nan XIANG 1Yiquan SHU 2Pengyi WANG 3Menghan YANG 2Haoran WANG 2Tao HUANG 2Junqing GUO 4Fuxiao CHEN4
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作者信息

  • 1. School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471023,China;National Key Laboratory for Precision Heat Processing of Metals,School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China
  • 2. School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471023,China
  • 3. College of Mechanical & Electrical Engineering,Shaanxi University of Science & Technology,Xi'an 710021,China
  • 4. School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471023,China;Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metal new Materials and Advanced Processing Technology,Luoyang 471023,China
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Abstract

Heterogeneous pressure-carrying medium was employed to establish a differentiated pressure field on sheet metal in flexible die forming process in this work,which aimed at matching the non-symmetric shape of target component and improving metal inflow to avoid local tensile instability.Specifically,metal inflow corresponding to the differentiated pressure field was analyti-cally evaluated.Forming of a typical non-symmetric shell component was experimentally and numerically studied based on the proposed method.Compared with forming processes based on the uniform pressure,difference of metal inflow in two sides of the non-symmetric component increased from 2.16 mm to 3.36 mm and metal inflow in critical region increased by 11.9％when differentiated pressure field(taking heterogeneous elastomer #4-3 for example)was employed.The resultant maximum thinning ratio decreased by 4.2％and the uniformity of shell thickness increased by 16.9％.With the decrease of Shore hardness of elastomer in the formed region,stress path in the ready-to-form region transferred towards the bi-axial tension stress state,i.e.,stress ratio(α)increased.And,stress triaxiality(η)in characteristic regions were regulated appropriately,which decreased the risk of tensile instability.It was attributed to the decreased normal pressure and fric-tional resistance at sheet/elastomer interface in the formed region.

Key words

Aluminum alloys/Finite element method/Metal forming/Plastic deformation/Sheet metal

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基金项目

presented investigations have been supported by the National Natural Science Foundation of China(52275329)

presented investigations have been supported by the National Natural Science Foundation of China(51905156)

presented investigations have been supported by the National Natural Science Foundation of China(51805309)

Natural Science Foundation of Henan(232300421059)

fellowship of China Postdoctoral Science Foundation(2020M672221)

出版年

2024
中国航空学报(英文版)
中国航空学会

中国航空学报(英文版)

CSTPCDEI
影响因子：0.847
ISSN：1000-9361
参考文献量29
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