Abstract: In this paper, we established the general theory of composite box-beam under the combinational deformation of tension, compression, bending and torsion, discussed the equivalent constitutive equations, and gave the equivalent elastic coefficients about two kinds of typical thin-walled beams.

Key words: composite material, thin-walled bar, equivalent constitutive equation, equivalent elastic coefficient

摘要： 建立了在拉、压、弯、扭组合变形下复合材料薄壁杆件理论,给出了典型薄壁箱梁的等效弹性系数.

关键词: 复合材料, 薄壁杆件, 等效弹性系数, 等效本构方程