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Vibration of composite beams with two overlapping delaminations

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Abstract.

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.

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Authors and Affiliations

  1. School of Mechanical and Production Engineering, Nanyang Technological University, Singapore, 639798

    Christian N. Della & Dongwei Shu

  2. State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100080, China

    Yapu Zhao

Authors
  1. Christian N. Della
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  2. Dongwei Shu
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  3. Yapu Zhao
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Corresponding author

Correspondence to Dongwei Shu.

Additional information

Christian N Della wishes to thank Nangyang Technological University for the scholarship.

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Della, C., Shu, D. & Zhao, Y. Vibration of composite beams with two overlapping delaminations. ACTA MECH SINICA 21, 47–55 (2005). https://doi.org/10.1007/s10409-004-0006-6

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  • DOI: https://doi.org/10.1007/s10409-004-0006-6

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