1.Key Laboratory of Advanced Forging Technology and Science,Ministry of Education, Yanshan University, Qinhuangdao，Hebei，066004
2.Key Laboratory of Special Transport Equipment，Yanshan University, Qinhuangdao，Hebei，066004
3.Hebei Innovation Center for Equipment Lightweight Design and Manufacturing, Qinhuangdao，Hebei，066004
Abstract：The AA5052 aluminum alloy extruded tube was used as inner base tube, the Q235 carbon structure steel coil welded tube was used as outer cladding steel/aluminum composite tube, and the particle media bulging behavior of the composite tubes was studied. The influences of tangential friction forces between tubes and the normal pressures on the stress of the base tubes during the bulging processes were analyzed through plastic theory. Numerical simulation was used to analyze the comprehensive influences of the friction coefficients between tubes and the anisotropy of the coated tubes on the strain forming limit of the base tubes. In addition, the wall thickness reduction of the single tubes and composite tubes and the stress and strain distribution of the base tubes during the bulging were given. Through the high-pressure bulging tests in the tube granular medium, limit bulging ratios of aluminum alloy tubes were compared under single tube and composite tube bulging conditions. The deformation compatibility of the composite tubes was analyzed. Results show that by applying Q235 carbon structural steel clad tubes, the bidirectional tensile stresses are reduced at the middle section of the bulging zones of the AA5052 base tubed, the wall thickness reduction of the base tube bulging zones is decreased, and the bulging ratio is increased by 22%. The maximum thinning rate of the base tubes under the composite tube is as 17.5%. The forming performance is significantly improved.
NEIC' S. Key Issues Related to Modelling of Internal Corrosion of Oil and Gas Pipelines：a Review ［J］. Corrosion Science, 2007, 49(12):4308-4338.
［2］
ISLAM M D, OLABI A G, HASHMI M S J. Feasibility of Multi-layered Tubular Components Forming by Hydroforming and Finite Element Simulation ［J］. Journal of Materials Processing Technology, 2006, 174(1/3): 394-398.
［3］
WU Shusen, ZHU Zeming, AN Ping，et al. Effect of Semi-solid Processing on Microstructure and Mechanical Properties of 5052 Aluminum Alloy［J］.Transactions of Nonferrous Metals Society of China, 2010, 20(S3): 758-762.
［4］
ROY S, SINGH S, SUWAS S, et al. Microstructure and Texture Evolution during Accumulative Roll Bonding of Aluminium Alloy AA5086［J］. Materials Science and Engineering A, 2011, 528: 8469-8478.
［5］
CUI X L, WANG X S, YUAN S J. Formability Improvement of 5052 Aluminum Alloy Tube by the Outer Cladding Tube［J］. International Journal of Advanced Manufacturing Technology, 2016，90（5/8）:1-8.
［6］
KUWABARA T, YOSHIDA K, NARIHARA K, et al. Anisotropic Plastic Deformation of Extruded Aluminum Alloy Tube under Axial Forces and Internal Pressure［J］. International Journal of Plasticity, 2005, 21(1):101-117.
［7］
HWANG Y M, LIN Y K. Evaluation of Flow Stresses of Tubular Materials Considering Anisotropic Effects by Hydraulic Bulge Tests［J］. Journal of Engineering Materials and Technology, 2007, 129(3): 414-421.
［8］
VELASCO R, BOUDEAU N. Tube Bulging Test: Theoretical Analysis and Numerical Validation［J］. Journal of Materials Processing Technology, 2008, 205(1/3): 51-59.
［9］
HWANG Y M, LIN Y K. Analysis of Tube Bulge Forming in an Open Die Considering Anisotropic Effects of the Tubular Material［J］. International Journal of Machine Tools and Manufacture, 2006, 46(15): 1921-1928.
［10］
WANG X, LI F. Analysis of Wall Thickness Variation in the Hydro-bending of a Double-layered Tube［J］. The International Journal of Advanced Manufacturing Technology, 2015, 81(1): 67-72.
［11］
ISLAM M D, OLABI A G, HASHMI M S J. Feasibility of Multi-layered Tubular Components Forming by Hydroforming and Finite Element Simulation［J］. Journal of Materials Processing Technology, 2006, 174(1/3): 394-398.
［12］
ALASWAD A, BENYOUNIS K Y, OLABI A G. Finite Element Comparison of Single and Bi-layered Tube Hydroforming Processes［J］. Simulation Modelling Practice & Theory, 2011, 19(7): 1584-1593.
SUN Xianjun, TAO Jie，GUO Xunzhong，et al. FE Simulation and Practice of the Hydro-bulging Process for Fe/Al Clad Tube T-shape ［J］. Forging & Stamping Technology, 2010（3）: 66-70.
［14］
JIA Xiangdong, ZHAO Changcai. Research and Application of Weight Function in Flexible Male Die Drawing Deformation Mechanism［J］. International Journal of Advanced Manufacturing Technology, 2017, 89(5/8):1645-1660.
［15］
YANG Zhuoyun, ZHAO Changcai, DONG Guojiang, et al. Analytical Model of Corner Filling with Granular Media to Investigate the Friction Effect between Tube and Media［J］. International Journal Advanced Manufacturing Technology, 2018，99（1/4）：211-224.
［16］
DONG Guojiang, ZHAO Changcai, PENG Yaxin, et al. Hot Granules Medium Pressure Forming Process of AA7075 Conical Parts［J］. Chinese Journal of Mechanical Engineering, 2015, 28(3): 580-591.
［17］
DONG Guojiang, ZHAO Changcai, YA Yuanyuan, et al. Discrete Element and Finite Element Coupling Simulation and Experiment of Hot Granule Medium Pressure Forming［J］. Transactions of Nonferrous Metals Society of China (English Edition), 2015, 28(3): 580-591.
DONG Guojiang, CHEN Mengjie, ZHU Liangjin, et al.Research on Dielectric Bulging Process of Composite Convex Ring Pipe Particles［J］. China Mechanical Engineering, 2018, 29(7): 870-878.
YANG Zhuoyun, ZHAO Changcai, DONG Guojiang, et al. Theoretical Analysis of High Pressure Forming Process in Granular Medium for Convex Ring Pipe Parts ［J］. China Mechanical Engineering, 2017，28(7)：867-876.
［20］
俞汉清, 陈金德. 金属塑性成形原理［M］. 北京：机械工业出版社,1998: 121-127.
YU Hanqing, CHEN Jinde. Principles of Metal Plastic Forming［M］. Beijing: China Machine Press, 1998: 121-127.
