吉林大学学报(工学版) ›› 2017, Vol. 47 ›› Issue (1): 180-184.doi: 10.13229/j.cnki.jdxbgxb201701027

• Orginal Article • Previous Articles     Next Articles

Influence of fiber fracture damage on dispersion characteristic of guided wave in composite plate

CHEN Jiang-yi, LIU Bao-yuan   

  1. School of Mechanical Engineering, Zhengzhou University, Zhengzhou 450001, China
  • Received:2015-08-10 Online:2017-01-20 Published:2017-01-20

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Abstract: The dispersion characteristic of guided wave in composite plate with fiber fracture damage is analyzed using strip element method, in which the different damage patterns are considered. The layer with fracture damage is assumed to have the same elastic constants as the substrate. Taking each layer as a strip element, the equation governing the movement of a single layer is constructed. Through assembling the governing equations of all layers, the global movement equation of the composite plate with fiber fracture damage is obtained. Rewriting the global equation yields the corresponding eigenvalue problem, which can be used to calculate the relationship between the guided wave frequency and wave number in the plate. Finally, the influence of different damage patterns on the dispersion characteristic of guided wave is investigated by numerical examples. The results may provide theoretical basis for non-destructive evaluation of damage in the fiber-reinforced composite plate via ultrasound technology.

Key words: engineering mechanics, composite plate, guided wave, dispersion characteristic, non-destructive evaluation, strip element method

CLC Number: 

  • O426.2
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