Non-linear vibration analysis of smart composite structures with discrete delamination using a refined layerwise theory

Application of layered finite elements in the numerical analysis of laminated composite and sandwich structures with delaminations

“…Alnefaie [35] used a full layerwise finite element model, for calculation of the fundamental dynamic characteristics of laminated plates considering interlaminar damage. Ghoshal et al [36][37] incorporated interlaminar contact during the ''breathing'' phenomena in the delaminated zone of smart composite plates. They have used a layered plate model to investigate linear and nonlinear responses of smart composite structures with delamination.…”

“…Nakon toga razdvojeni slojevi tokom kretanja mogu ponovo da do u u kontakt i na taj na in zatvore postoje i me uprostor. Ovaj fenomen se u literaturi naziva "disanje" delaminacije [36][37], koje se može modelirati primenom kontaktnih uslova izme u vorova, bez uzimanja u obzir trenja [6]. Kontaktni algoritam uspešno spre ava me usobno prodiranje sloja u sloj tokom dinami kog odgovora kompozitnih plo a s delaminacijom.…”

“…After that the separated layers may unload and again contact each other at that delaminated interface. This phenomenon is referred to as ''breathing'' of a delamination [36][37], which can be modelled using the node-to-node frictionless contact conditions [6]. The contact algorithm successfully ''corrects'' the interlaminar penetration during the transient response of the delaminated composite plate both in the linear and geometrically nonlinear analysis.…”

“…Alnefaie [35] je koristio potpuni slojeviti numeri ki model baziran na MKE za prora un dinami kih karakteristika laminatnih plo a uz uzimanje u obzir ošte enja izme u slojeva. Kontakt izme u slojeva tokom fenomena "disanja" delaminacije kod "pametnih" kompozitnih plo a uveden je u radovima [36][37]. Koriš en je slojeviti model plo e za ispitivanje linearnih i nelinearnih odgovora "pametnih" kompozitnih plo a s delaminacijom.…”

Linear and Nonlinear Dynamic Analyses of Sandwich Panels with Face Sheet‐to‐Core Debonding

“…Hence, nonlinear models have been developed to handle the nonlinearities caused by either of or both of the factors, namely, opening and closing of the debonding (breathing) and contact/impact between the debonded layers during vibration. In [69] the contact problem in delaminated surfaces has been modelled in terms of fictitious linear springs to study the dynamic transient behaviour of a delaminated plate. An analytical model of a 1D sandwich beam accounting for the real contact has been created in [70] to examine the influence of the contact phenomenon on the transient behaviour of the beam.…”