不同压剪比下复合材料加筋壁板屈曲行为及承载能力试验研究

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关键词：复合材料加筋壁板；复合载荷；压剪比；屈曲；承载能力中图分类号： 文献标志码：A 文章编号：2095-2945(2025)14-0084-04

Abstract:Aimedatthestabilitydesign challngesof compositestiffnedpanelsundercombinedcompressive-shearloading, this paper investigated the mechanism by which the axial-shear stress ratio( R= compressive load/shear load） regulates buckling behaviorthroughexperimentalstudies.Aself-developedflatpanelaxial-sheartesting devicewasused，whilstagradient experimentalmatrixwithsixaxial-shearstressratioconditionswasestablished.Theenvelopecurvesofcompressiveandshear buckling loads were mapped,，and failure test on the specimen under a loading condition with R=2 was conducted.The experimentalresultsrevealthattheriticalcompresivebucklingloadincreaseswithhigheraxial-shearratios,whilethecritical shearbuckling load decreases with increasing R .An exponential function model based onthe natural logarithm achieves good predictionaccuracyfortheloadenvelopecurves.Specimenfalureprimarilyresultedfromlarge-areadebondingbetweentheskin andstffeners，withpost-bucklingload-caryingcapacityreaching1.45timesthebucklingload.Thisstudyprovidesvaluable references for the design of primary load-bearing composite structures.

Keywords: composite stiffned panel; combined loading; axial-to-shear ratio; buckling; carrying capacity

复合材料加筋壁板结构通常由薄壁面板与规则排列的加强筋构成，因其轻量化、高比强度及抗疲劳性能等优势，成为飞行器机身、机翼等关键承载部件的常见结构形式。（剩余6402字）