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Elastic buckling analysis and optimization of thin-walled bamboo-like pipe beam subjected to pure bending

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摘要 In this paper,a stiffening design imitating the bamboo node is proposed for weight reduction of the long composite pipe beam subjected to bending load.The distribution of bamboo nodes can efficiently suppress the ovalization of the section,thus significantly improving the bending resistance of the bamboo.Based on this principle,ring stiffeners are proposed to be fixed to the pipe beam,making the long beam equivalent to the combination of a series of short pipes that suffered less section ovalization.A database of the optimal laminate orientations for different normalized lengths is obtained through optimizations,where the discreteness of the ply count is considered.Based on this database,weight optimizations are conducted,and the optimal designs of beams with and without stiffeners are obtained and compared.The comparison results show that the proposed bamboo-like stiffened beam not only regains a near-linear load–displacement relationship,but also reduces the weight by up to 16%under the same buckling load.In addition,it is found that for the pipe beams with radius-to-thickness ratios of more than 18,increasing the radius leads to a decrease in elastic buckling resistance when the weight remains a constant,which is opposite to the design for strength and stiffness.The model and database developed in this paper can provide a reference for weight reduction design and weight estimation for composite pipe beams.
出处 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2024年第3期133-152,共20页 中国航空学报(英文版)
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  • 1陈薇薇,陈万吉.关于无人机机翼复合材料结构模拟及有限元分析[J].飞机设计,2012,32(1):15-18. 被引量:4
  • 2程文礼,邱启艳,赵彬.无人机结构复合材料应用进展[J].航空制造技术,2012,55(18):88-91. 被引量:13
  • 3黄春芳,曾竟成,江大志,鞠苏,石刚.先进复合材料在无人机和太阳能飞机上的应用[J].材料保护,2013,46(S2):133-136. 被引量:8
  • 4Fuchs H P,Hyer M W.The nonlinear prebuckling response of short thin-walled laminated composite cylinders in bending[].Composite Structures.1996
  • 5Dawson M A,Gibson L J.Optimization of cylindrical shells with compliant cores[].International Journal of Solids and Structures.2007
  • 6Wu Q.Mechanical Properties and Optimization of Ul- tra-Light Weight Sandwich Structures[]..2006
  • 7S.Barlag,H.Rothert.An idealization concept for the stability analysis of ring-reinforced cylindrical shells under external pressure[].In-ternational Journal of Non-Linear Mechanics.2002
  • 8Hutchinson J W,He M Y.Buckling of cylindrical sandwich shells with metal foam cores[].International Journal of Solids and Structures.2000
  • 9Shen H S and Chen T Y.Buckling and post-buckling behavior of cylindrical shells under combined external pressure and axial compression[].Thin walled Structures.1991
  • 10Andrea Spagnoli.Different buckling modes in axially stiffened conical shells[].Engineering Structures.2001

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