Abstract: In this paper, the carbon-carbon fiber, carbon-glass fiber-foam sandwich composite laminate damage under low-velocity impact was analyzed, the residual strength of laminate was evaluated by combining theoretical model, finite-element simulation and practical test. This paper used energy principle to establish the distribution of stress of laminate under low-velocity impact, to use numeric value simulating progressive da-maged laminate's residual strength, and measured the compression strength of composite laminate test subjects before and after the drop hammer impact test, the final result number matched perfectly with the test number, at the same time the paper analyzed the effects of fiber type and ply stacking sequence on laminate damage tolerance.
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2020, Vol. 34 
