Three-dimensional assumed strain solid element for piezoelectric actuator/sensor analysis

2001 ◽  
Author(s):  
Hoon C. Park ◽  
Sangki Lee ◽  
Byung C. Cho ◽  
Kwang J. Yoon ◽  
Nam Seo Goo
Keyword(s):  
Piezoelectric Actuator ◽  
Three Dimensional ◽  
Solid Element ◽  
Assumed Strain ◽  
Sensor Analysis

Piezoelectric Actuator–Sensor Analysis using a Three-Dimensional Assumed Strain Solid Element

2004 ◽  
Vol 15 (5) ◽  
pp. 329-338 ◽  
Author(s):  
Sangki Lee ◽  
Byung C. Cho ◽  
Hoon C. Park ◽  
Nam S. Goo ◽  
Kwang J. Yoon
Keyword(s):  
Piezoelectric Actuator ◽  
Three Dimensional ◽  
Solid Element ◽  
Assumed Strain ◽  
Sensor Analysis

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.

Water Synthetic Jet Driven by a Piezoelectric Actuator – LIF and PIV Experiments

2015 ◽  
Vol 1104 ◽  
pp. 45-50 ◽  
Author(s):  
Zuzana Broučková ◽  
Shu Shen Hsu ◽  
An Bang Wang ◽  
Zdeněk Trávníček
Keyword(s):  
Reynolds Number ◽  
Particle Image Velocimetry ◽  
Piezoelectric Actuator ◽  
Particle Image ◽  
Three Dimensional ◽  
Laser Induced Fluorescence ◽  
Synthetic Jet ◽  
Fluid Exchange ◽  
Image Velocimetry ◽  
Surrounding Fluid

A synthetic jet (SJ) is a fluid jet flow generated from fluid oscillations during a periodical fluid exchange between an actuator cavity and surrounding fluid. A water synthetic jet was generated from submerged piezoelectric-driven SJ actuator. The actuator slot width was 0.36 mm. The experiments were performed using laser induced fluorescence (LIF) flow visualization and particle image velocimetry (PIV) techniques, both in a phase locked setup. The LIF visualization was used to demonstrate three-dimensional nature of the SJ formation process and to estimate SJ velocity. The PIV experiment quantified SJ velocity cycles in chosen plans. The driven frequency was adjusted near the resonance at approximately 46 Hz. It was evaluated theoretically and confirmed experimentally by means of LIF visualization. The time-mean orifice velocity and the Reynolds number were estimated asU0= 0.07–0.10 m/s andRe= 100–150, respectively.

Shape Optimization of Cutouts in Laminated Composite Plates Using Solid Element

2005 ◽  
Vol 297-300 ◽  
pp. 2740-2745
Author(s):  
Seok Yoon Han ◽  
Y.J. Ma ◽  
J.Y. Park
Keyword(s):  
Shape Optimization ◽  
Three Dimensional ◽  
Laminated Composite ◽  
Composite Plates ◽  
Volume Control ◽  
Growth Strain ◽  
Laminated Composite Plates ◽  
Failure Index ◽  
Solid Element ◽  
Strain Method

Shape optimization was performed to obtain the precise shape of cutouts including the internal shape of cutouts in laminated composite plates by three dimensional modeling using solid element. The volume control of the growth-strain method was implemented and the distributed parameter was chosen as Tsai-Hill failure index for shape optimization. In order to verify the validity of the obtained optimal shapes, the changes of the maximum Tsai-Hill failure index were examined for each load condition and cutouts. The following conclusions were obtained in this study; 1) It was found that growth-strain method was applied efficiently to shape optimization of three dimensional cutouts in anisotropic laminate composite, 2) The optimal three dimensional shapes of the various load conditions and cutouts were obtained, 3) The maximum Tsai-Hill failure index was reduced up to 68% when shape optimization was performed under the initial volume by volume control of growth-strain method.

Analysis of Low-Velocity Impact on Composite Sandwich Panels Using an Assumed Strain Solid Element

2004 ◽  
Vol 261-263 ◽  
pp. 283-288 ◽  
Author(s):  
Hoon Cheol Park ◽  
Jung Park ◽  
Nam Seo Goo ◽  
Kwang Joon Yoon ◽  
Jae Hwa Lee
Keyword(s):  
Elastic Constant ◽  
Contact Force ◽  
Sandwich Panels ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Velocity Impact ◽  
Composite Sandwich Panels ◽  
Composite Sandwich ◽  
Solid Element ◽  
Assumed Strain

Low-velocity impact on composite sandwich panels has been investigated. The contact force is computed from a proposed modified Hertzian contact law. In the proposed contact law, the exponent is adjusted and the through-the-thickness elastic constant of honeycomb core is reduced properly to approximately predict the measured contact force-time history during the impact. The equivalent transverse elastic constant is calculated from the rule of mixture. Nonlinear equation to calculate the contact force is solved by the Newton-Raphson method and time integration is done by the Newmark-beta method. A finite element program for the low-velocity impact analysis is coded by implementing these techniques and an 18-node assumed strain solid element. Behaviors of composite sandwich panels subjected to low-velocity impact are analyzed for various cases with different geometry and lay-ups. It has been found that the present code with the proposed contact law can predict measured contact forces and contact times for most cases within reasonable error bounds, especially for thick sandwich plates.

Three-dimensional stress analysis of tubular joint using rezone technique

1986 ◽  
Vol 13 (3) ◽  
pp. 382-385
Author(s):  
G. S. Bhuyan ◽  
M. Arockiasamy ◽  
K. Munaswamy
Keyword(s):  
Stress Analysis ◽  
Transition Zone ◽  
Degrees Of Freedom ◽  
Hot Spot ◽  
Three Dimensional ◽  
Axial Loading ◽  
Boundary Displacement ◽  
Solid Element ◽  
Weld Toe ◽  
Tubular Joint

This note presents three-dimensional stress analysis results of a welded tubular T-joint under axial loading, using rezone technique. The rezone technique is used to reduce computer storage requirements, as well as solution costs, that result from the large number of degrees-of-freedom associated with three-dimensional analysis of the entire joint using solid elements. The hot-spot region around the weld toe and the weld reinforcement are modelled using three-dimensional incompatible 8-node brick and 6-node prism elements. The boundary nodal displacements for the rezoned model are obtained from plate analysis of the entire joint. The boundary values, at the plate-to-solid element transition zone, are distributed between two solid element nodes maintaining boundary displacement compatibility. The stresses at the critical lines, obtained from the rezoned analysis, are compared with those of the entire three-dimensional and plate model analyses. Key words: tubular joint, rezoned model, transition zone, boundary displacement compatibility, incompatible elements.

scholarly journals The Progressive Failure Analysis of Uni-Directional Fibre Reinforced Composite Laminates

2020 ◽  
Vol 36 (2) ◽  
pp. 159-166
Author(s):  
T. Yi
Keyword(s):  
Composite Laminates ◽  
Progressive Failure ◽  
Failure Process ◽  
Damage Model ◽  
Three Dimensional ◽  
Dissipated Energy ◽  
Solid Element ◽  
Reinforced Composite ◽  
Shear Rupture ◽  
Composite Solid

ABSTRACTThe three dimensional standard damage model developed by Lavedeze et.al [9, 13] for uni-directional fibre reinforced ply is implemented into the nonlinear solution of NX Nastran within composite solid element to analyze the progressive damage process and ultimate failure of fibre reinforced composite laminates. This ply level meso-damage-constitutive-model takes into account main damage mechanisms including fibre breaking, matrix transverse cracking, and fibre/matrix de-bonding; also considers contributions like plasticity coupling, damage delay effects, and elastic nonlinearity in fibre compression. Dissipated energy and damage status are also introduced to reflect the damage condition on the macrostructural-level. Using the implemented code, simulation is carried out on the uniaxial tension of a [±45]2s laminate with IM6/914 material, wherein the predicted ply shear rupture stress matches the experimental results very well and better than the theoretical predictions in literature. Moreover, a [-45/0/45/90] holed laminate loaded in tension is simulated to show the complex behavior of subcritical damage evolution and failure process in the composite structure. The composite solid element with damage model supported in NX Nastran is shown to be a reliable tool to analyze the progressive failure of uni-directional fibre reinforced composite laminates.

Sign in / Sign up

Export Citation Format

Share Document