基于ABAQUS的热辅助铆接分析
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摘要
针对大直径、难成形合金材质铆钉在常规铆接过程中易出现变形开裂、干涉量不足等问题,提出将铆钉先"预热"处理,再进行铆接的连接方法。利用有限元分析软件,以7075铝合金材料建立有限元模型,模拟在不同温度、不同铆接速率下,铆钉的变形及受力情况。研究表明:随着热辅助铆接温度的升高,压铆力的减少幅度呈现先升高后降低的趋势,较小的压铆力能够减小钉杆开裂的风险;合适的铆接速率也能改善热辅助铆接的铆接品质,提高疲劳寿命。这种热辅助铆接技术对于今后铆钉铆接的技术工艺具有一定的参考价值。
In view of the problems of large diameter and difficult-to-shape alloy rivets,such as deformation,cracking and insufficient interference,etc.,rivets were firstly preheated and then riveted.Finite element analysis software was used to establish the finite element model of 7075 aluminum alloy,in order to simulate the deformation and stress of rivets at different temperatures and different riveting rates.The results show that with the increase of heat-assisted riveting temperature,the reduction of riveting force tends to increase firstly and then decrease,and the smaller riveting force can reduce the risk of nail cracking.The suitable riveting rate can also improve the riveting quality of heat-assisted riveting,and improve fatigue life.This heat-assisted riveting technology for the future riveting technology of rivet has a certain reference value.
In view of the problems of large diameter and difficult-to-shape alloy rivets,such as deformation,cracking and insufficient interference,etc.,rivets were firstly preheated and then riveted.Finite element analysis software was used to establish the finite element model of 7075 aluminum alloy,in order to simulate the deformation and stress of rivets at different temperatures and different riveting rates.The results show that with the increase of heat-assisted riveting temperature,the reduction of riveting force tends to increase firstly and then decrease,and the smaller riveting force can reduce the risk of nail cracking.The suitable riveting rate can also improve the riveting quality of heat-assisted riveting,and improve fatigue life.This heat-assisted riveting technology for the future riveting technology of rivet has a certain reference value.
引文
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[16] ZHANG K F,CHENG H,LI Y.Riveting Process Modeling and Simulating for Deformation Analysis of Aircraft’s Thin-walled Sheet-metal Parts [J].Chinese Journal of Aeronautics,2011,24(3):369-377.
[17] 黄志祥.基于超声振动辅助钛合金铆钉铆接工艺研究[D].南京:南京航空航天大学,2015.
[18] KELLY B,COSTELLO C.FEA Modelling of Setting and Mechanical Testing of Aluminum Blind Rivets[J].Journal of Materials Processing Technology,2004,153(1):74-79.
[2] 张昱煜,梁海朝,李强,等.碳纤维复合材料在航天大尺寸结构中的应用[J].军民两用技术与产品,2017(7):57-58.
[3] 吴沁怡.我国无人机的发展现状与展望[J].科技展望,2016,25(12):285.
[4] BRUHN E F.Analysis and Design of Flight Vehicle Structures[M].Jacobs Pub,1965:7-15.
[5] 张利军,王幸运,郭启义,等.钛合金材料在国航空紧固件中的应用[J].航空制造技术,2013(16):129-133.ZHANG L J,WANG X Y,GUO Q Y,et al.Application of Titanium Alloy in Chinese Aircraft Fastener [J].Aerospace Manufacturing Technology,2013(16):129-133.
[6] 周银晓,杨建江.先进复合材料结构飞机机械连接技术现状及发展方向分析[J].信息系统工程,2017(5):17.
[7] 杨桂通.塑性动力学:新版[M].北京:高等教育出版社,2000:21-32.
[8] 张旭.电磁铆接过程铆钉动态塑性变形行为及组织性能研究[D].哈尔滨:哈尔滨工业大学,2016.
[9] 卿华.飞机电磁热铆接系统研究[D].武汉:武汉理工大学,2007.
[10] MANES A,GIGLIO M,VIGANO F.Effect of Riveting Process Parameters on the Local Stress Field of a T-joint[J].International Journal of Mechanical Sciences,2011,53(12):1039-1049.
[11] 王宇波,余路,洪华舟,等.自动钻铆连接件疲劳性能分析[J].南京航空航天大学学报,2012,44(S1):52-55.WANG Y B,YU L,HONG H Z,et al.Fatigue Analysis of Components Produced by Automatic Drilling and Riveting[J].Journal of Nanjing University of Aeronautics & Astronautics,2012,44(S1):52-55.
[12] 邓将华,李春峰,于海平,等.电磁铆接技术[J].锻压技术,2010,35(3):1-6.DENG J H,LI C F,YU H P,et al.Electromagnetic Riveting Technology[J].Forging & Stamping Technology,2010,35 (3):1-6.
[13] 陈福玉,朱如鹏,蒋红宇,等.孔径对铆接连接件疲劳寿命影响的试验[J].机械设计与研究,2011,27(2):98-101.CHEN F Y,ZHU R P,JIANG H Y,et al.Test Study of Hole Diameter on Fatigue Life of Riveting[J].Machine Design and Research,2011,27 (2):98-101.
[14] 曹增强,代瑛.楔形复合材料结构电磁铆接工艺[J].航空学报,2009,30(10):1998-2002.CAO Z Q,DAI Y.Electromagnetic Riveting Technology in Cuneal Composite Structures[J].Acta Aeronautica et Astronautica Sinica,2009,30 (10):1998-2002.
[15] 石亦平,周玉蓉.ABAQUS 有限元分析实例详解[M].北京:机械工业出版社,2010:125-181.
[16] ZHANG K F,CHENG H,LI Y.Riveting Process Modeling and Simulating for Deformation Analysis of Aircraft’s Thin-walled Sheet-metal Parts [J].Chinese Journal of Aeronautics,2011,24(3):369-377.
[17] 黄志祥.基于超声振动辅助钛合金铆钉铆接工艺研究[D].南京:南京航空航天大学,2015.
[18] KELLY B,COSTELLO C.FEA Modelling of Setting and Mechanical Testing of Aluminum Blind Rivets[J].Journal of Materials Processing Technology,2004,153(1):74-79.