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Vibration Parameters Based Debonding Defect Detection for Sandwich Plate with Pyramidal Truss Cores
Shuxia Tian, Jianxiu Liu, Zhenmao Chen, Dehai Zhang, Yang Cao
144 - 151
10.3233/978-1-61499-836-5-144
Studies in Applied Electromagnetics and Mechanics
Volume 43: Electromagnetic Non-Destructive Evaluation (XXI)
Abstract

As a kind of super-light lattice material, the sandwich plate with pyramidal truss cores has wide application prospect. In this paper, a vibration parameter based nondestructive testing method using Uniform Load Surface (ULS) curvature was proposed to detect the delamination defects of the pyramid-type lattice sandwich plate. The feasibility of the approach is that the surface smoothing method and curvature mode change rate method are adopted to overcome the dependence on the unflawed model. The validity and efficiency of the proposed methods were demonstrated through numerical simulations.

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