Linear statics and free vibration sensitivity analysis of the composite sandwich plates based on a layerwise/solid-element method

2013 ◽  
Vol 106 ◽  
pp. 175-200 ◽  
Author(s):  
D.H. Li ◽  
Y. Liu ◽  
X. Zhang
Keyword(s):  
Sensitivity Analysis ◽  
Free Vibration ◽  
Sandwich Plates ◽  
Vibration Sensitivity ◽  
Composite Sandwich ◽  
Solid Element ◽  
Composite Sandwich Plates ◽  
Element Method

Extended Layerwise/Solid-Element method of composite sandwich plates with damage

2018 ◽  
Vol 26 (16) ◽  
pp. 1376-1389 ◽  
Author(s):  
X. Lu ◽  
J. Y. Yang ◽  
D. Xu ◽  
Y. G. Wu ◽  
D. H. Li
Keyword(s):  
Sandwich Plates ◽  
Composite Sandwich ◽  
Solid Element ◽  
Composite Sandwich Plates ◽  
Element Method

A three-dimensional numerical model for delaminations, transverse crack or debonding in composite sandwich plates with piezoelectric sensors

2021 ◽  
pp. 1045389X2110386
Author(s):  
Yaogang Wu ◽  
Zhengguang Xiao ◽  
Kangwei Liu ◽  
Dinghe Li
Keyword(s):  
Transverse Crack ◽  
Three Dimensional ◽  
Piezoelectric Sensor ◽  
Internal Force ◽  
Piezoelectric Sensors ◽  
Sandwich Plates ◽  
Composite Sandwich ◽  
Finite Element Software ◽  
Solid Element ◽  
Composite Sandwich Plates

An Extended Layerwise/Solid-Element (XLW/SE) method is developed based on the Extended Layerwise method (XLWM) and eight-node solid element method for the static analysis of damaged composite sandwich structures with piezoelectric sensor. In this method, the XLWM is used to model the facesheets and piezoelectric sensors, and the eight-node solid element is used for the lattice. Based on the equilibrium conditions of displacement and internal force of the overlapped joints at the facesheet/sensors and facesheet/lattice interfaces, the general governing equation is established. In the numerical examples, the proposed method is verified by comparing with the 3D elasticity model developed in the commercial finite element software, and composite sandwich plates with delamination and/or transverse crack and/or debonding are analyzed.

Free Vibration of Thermally Buckled Composite Sandwich Plates

2005 ◽  
Vol 128 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Le-Chung Shiau ◽  
Shih-Yao Kuo
Keyword(s):  
Free Vibration ◽  
Vibration Mode ◽  
Free Vibration Analysis ◽  
Sandwich Plates ◽  
Vibration Modes ◽  
Buckling Mode ◽  
Composite Sandwich ◽  
Plate Buckling ◽  
Pattern Change ◽  
Composite Sandwich Plates

A high precision triangular plate element is developed for the free vibration analysis of thermally buckled composite sandwich plates. Due to an uneven thermal expansion in the two principal material directions, the buckling mode of the plate may change from one pattern to another in the postbuckling region for certain fiber orientation and aspect ratio of the plate. Because of this buckle pattern change, the sequence of natural frequencies of the plate is also suddenly altered. By examining the buckling and free vibration modes of the plate, a clear picture of buckle pattern change and vibration mode shifting is presented. Numerical results show that if the shape of a free vibration mode is similar to the plate buckling mode then the natural frequency of that mode will drop to zero when the temperature reaches the buckling temperature.

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