TY - GEN
T1 - Efficient higher order plate theory for viscoelastic laminated composites
AU - Sy, Ngoc Nguyen
AU - Lee, Jaehun
AU - Cho, Maenghyo
PY - 2013
Y1 - 2013
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84881348272&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84881348272
SN - 9781624102233
T3 - Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
BT - 54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
T2 - 54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Y2 - 8 April 2013 through 11 April 2013
ER -