摘要
提出一种复合材料矩形薄壁管轴压局部屈曲载荷的计算方法。将轴压载荷作用下的复合材料矩形薄壁管的壁板视为单向受压各向异性板,在其平衡微分方程的解中引入弹性嵌固系数,得到了复合材料矩形薄壁管局部屈曲载荷的解析式。与文献中的试验数据和本文的有限元结果进行了对比,验证了计算模型的正确性。通过对4种铺层复合材料矩形薄壁管等效刚度系数进行定量计算分析了计算模型的适用范围。结合复合材料杆件欧拉屈曲载荷的计算公式,得出了综合考虑整体失稳和局部失稳的屈曲载荷的计算公式。研究发现在铺层参数不变时,存在区分发生局部屈曲和欧拉屈曲的临界长宽比。
A calculation method for the local buckling load of a composite rectangular thin-walled tube is proposed.The wall plate of the composite rectangular thin-walled tube under the axial compression load is regarded as the one-way compression anisotropic plate,and the elastic embedded coefficient is introduced into the solution of the equilibrium differential equation,and the rectangular thin-walled tube of the composite material is obtained,as well as the analytical formula of the buckling load.Compared with the experimental data in the literature and the finite element results of this paper,the correctness of the computational model is verified.The applicable range of the calculation model is analyzed by quantitative calculation of the equivalent stiffness coefficients of four kinds of laminated composite rectangular thin-walled tubes.Combined with the calculation formula of Euler′s buckling load of composite members,the calculation formula of buckling load considering the overall instability and local instability is obtained.It is found that when the layup parameters are constant,there is a critical aspect ratio that distinguishes between local buckling and Euler buckling.
作者
朱秀杰
熊超
尹德军
殷军辉
邓辉咏
李宝晨
ZHU Xiu-jie;XIONG Chao;YIN De-jun;YIN Jun-hui(Shijiazhuang Campus,Army Engineering University,Shijiazhuang 050003,China)
出处
《玻璃钢／复合材料》
CAS
北大核心
2019年第11期30-36,共7页
Fiber Reinforced Plastics/Composites
基金
军队重点攻关项目(ZS2015070132A12002)
关键词
复合材料矩形薄壁管
局部屈曲
欧拉屈曲
层合板刚度系数
composite rectangular thin-walled tube
local buckling
euler buckling
laminated plate stiffnesscoefficient
