Efficient higher order plate theory for viscoelastic laminated composites

Ngoc Nguyen Sy, Jaehun Lee, Maenghyo Cho

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In order to analysis time-dependent mechanical behavior accurately, an efficient higherorder plate theory is developed for viscoelastic laminated composite plates. In-plane displacement fields are obtained by superimposing a cubic varying displacement field on a zigzag linearly varying displacement. The time-dependent relaxation modulus has form of Prony series which can be determined by mastering curve experimental data. The constitutive equation for linear viscoelastic materials as Boltzmann superposition integral equation is simplified by convolution theorem of Laplace transform to avoid direct integration as well as to improve both accuracy and computational efficiency. Moreover, the free top and bottom condition as well as continuity condition at interface layers to reduce unknown variables can be employed much more conveniently. The viscoelastic responses in real time domain are obtained through various numerical inverse Laplace transforms. The numerical results for graphite/epoxy GY70/339 material are analyzed and compared with the solution of elastic composite laminated plates.

Original languageEnglish
Title of host publication54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
StatePublished - 2013
Event54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference - Boston, MA, United States
Duration: 8 Apr 201311 Apr 2013

Publication series

NameCollection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
ISSN (Print)0273-4508

Conference

Conference54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Country/TerritoryUnited States
CityBoston, MA
Period8/04/1311/04/13

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