Buckling of Rectangular Delamination Bridged by Fibers

Abstract

Abstract:The problem of buckling of delamination stitched with fiberbridge in 3D composites was solved by FEA. Linear springs of tensiononly or compressiononly distributed on the nodes of delamination cells are used to simulate the fibers and substrate respectively. The problem of eigenvalue buckling is transformed into the problem of geometric nonlinearities with an initial imperfection and solved by FEA of incremental nonlinear structural analysis. The results show that there are period contact points (districts) between delamination and substrate. And as the elastic coefficient of the fiber bridge increases, the critical buckling loads may also increase. The relation of the characteristic length and fiberbridge is expressed by mathematical formula.

Key words:delamination,fiberbridge,buckling,buckling modal

CLC Number:

O 343

DI San-Dong, ZHANG Yang, LI Si-Ping. Buckling of Rectangular Delamination Bridged by Fibers[J]. Journal of Shanghai Jiaotong University, 2011, 45(10): 1475-1478.

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