Vibration of composite beams with two overlapping delaminations 被引量：3

Vibration of composite beams with two overlapping delaminations

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摘要 Delaminations in composite laminates may de-velop from small cracks due to fabrication and impact load-ing,or from places of high stress concentration.The locationsof the delaminations are not determinate.In this research,ananalytical solution for the free vibration of a composite beamwith two overlapping delaminations is presented.The dela-minated beam is analyzed as seven interconnected beamsusing the delaminations as their boundaries.The continuityand equilibrium conditions are satisfied between the adjoin-ing regions of the beams.Classical beam theory is applied toeach of the beams.Complex vibration behaviors emerge fordifferent sizes and locations of the delaminations.Compar-ison with analytical results reported in the literature verifiesthe validity of the present solution. Delaminations in composite laminates may develop from small cracks due to fabrication and impact loading, or from places of high stress concentration. The locations of the delaminations are not determinate. In this research, an analytical solution for the free vibration of a composite beam with two overlapping delaminations is presented. The delaminated beam is analyzed as seven interconnected beams using the delaminations as their boundaries. The continuity and equilibrium conditions are satisfied between the adjoining regions of the beams. Classical beam theory is applied to each of the beams. Complex vibration behaviors emerge for different sizes and locations of the delaminations. Comparison with analytical results reported in the literature verifies the validity of the present solution.

作者 ChristianN.Della DongweiShu YapuZhao

机构地区 SchoolofMechanicalandProductionEngineering StateKeyLaboratoryofNonlinearMechanics

出处《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2005年第1期47-55,共9页 力学学报（英文版）

关键词 VIBRATION DELAMINATIONS Composite beams Natural frequency Mode shape Vibration Delaminations Composite beams Natural frequency Mode shape

分类号 O175.13 [理学—基础数学]

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