Abstract
Abstract As one of the most dangerous defects in the sandwich panel, debonding could significantly degrade load carrying capacity and affect dynamic behaviour. The present work dealt with debonding detection of the rectangular clamped hybrid sandwich plate by using ABAQUS software. The influence of various damage ratios on the linear and nonlinear dynamic responses has been studied. The finite element model was initially validated by comparing the modal response with the experimental test. Rectangular debonding was detected by comparing dynamic responses of free and forced vibrations between intact and debonded models. A wide range of driving frequency excitation corresponding to transient and harmonic concentrated loads was implemented to highlight nonlinear behaviour in the intermittent contact in the debonded models. The results showed that debonding existence contributed to the natural frequency reduction and modes shape change. The numerical results revealed that debonding affected both the steady-state and impulse responses of the debonded models. Using the obtained responses, it was detected that the contact in the debonded region altered the dynamic global response of the debonded models. The finding provided the potential debonding diagnostic in ship structure using vibration-based structural health monitoring.
Highlights
As one of the most dangerous defects in the sandwich panel, debonding could significantly degrade load carrying capacity and affect dynamic behaviour
The present work dealt with debonding detection of the rectangular clamped hybrid sandwich plate by using ABAQUS software
The results showed that debonding existence contributed to the natural frequency reduction and modes shape change
Summary
Abstract: As one of the most dangerous defects in the sandwich panel, debonding could significantly degrade load carrying capacity and affect dynamic behaviour. A majority of previous investigations have been reviewed to explore the dynamic behaviour of the composite sandwich, there is limited study in the comprehensive assessment of dynamic behaviour and nonlinear characteristic of hybrid sandwich panels containing metal/polymer combinations as part of ship structure due to debonding problems. There is a limited study concerning the validity and correctness of proposed debonding modelling of hybrid sandwiches with the response obtained from the experimental test. To address this issue, the numerical damage assessment of a hybrid sandwich containing a steel faceplate and polymer core was developed in this study.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
