Theoretical And Experimental Research On Axial Stressed Fiber Reinforced Composite Members

Space structure is developed to be lighter and larger,which puts forward higher requirements on materials.Fiber reinforced composite is such kind of material that combines light weight,high strength and strong corrosion-resistance.On the background of new carbon fiber cable dome,experiments,numerical simulation and theory analysis are performed to investigate the performance of axial stressed fiber reinforced composite members in this paper.Following contents are included in this paper:1.Basic mechanics performance parameters of pultruded glass fiber composites are obtained by material tests.Axial tensile test are conducted to get the ultimate bearing capacity,tensile strength,elastic modulus and failure modes of GFRP plates.The influence of the width and thickness of GFRP plate are analyzed through finite element software ABAQUS.2.The stability performance of pultruded GFRP long pipes is investigated in experimental ways,from which the ultimate bearing capacity and failure modes of GFRP long pipes are obtained.Initial defects of the pipe are introduced and finite element model is established,whose results match well with experiments,proving the correctness of the modeling approach.3.Formula of buckling load and bearing capacity of GFRP pipe are concluded.The buckling load formula of compressed GFRP pipe is concluded through eigenvalue buckling analysis while the formula of the stability bearing capacity of pultreded GFRP pipes drawn by modifying Perry's formula.Also,the influence of slenderness ratio,diameter-thickness ratio,boundary conditions and elastic constraint conditions on buckling loads of pultruded GFRP pipes is analyzed.