Finite element analysis of dielectric elastomer membranes using shell elements

2018 ◽  
Vol 10 (4) ◽  
pp. 044704 ◽  
Author(s):  
Gunmo Gu ◽  
Zhihui Lai
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Dielectric Elastomer ◽  
Element Analysis ◽  
Shell Elements

Design of a Single-Acting Constant-Force Actuator Based on Dielectric Elastomers

2008 ◽  
Author(s):  
Giovanni Berselli ◽  
Rocco Vertechy ◽  
Gabriele Vassura ◽  
Vincenzo Parenti Castelli
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Compliant Mechanism ◽  
Structural Parameters ◽  
Dielectric Elastomer ◽  
Constant Force ◽  
Element Analysis ◽  
Body Model ◽  
Rigid Body Model ◽  
Supporting Frame

The interest in actuators based on dielectric elastomer films as a promising technology in robotic and mechatronic applications is increasing. The overall actuator performances are influenced by the design of both the active film and the film supporting frame. This paper presents a single-acting actuator which is capable of supplying a constant force over a given range of motion. The actuator is obtained by coupling a rectangular film of silicone dielectric elastomer with a monolithic frame designed to suitably modify the force generated by the dielectric elastomer film. The frame is a fully compliant mechanism whose main structural parameters are calculated using a pseudo-rigid-body model and then verified by finite element analysis. Simulations show promising performance of the proposed actuator.

Finite Element Analysis of Automobile Drive Axle Housing Based on ANSYS

2015 ◽  
Vol 741 ◽  
pp. 223-226
Author(s):  
Hai Bin Li
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Dynamic Performance ◽  
Element Analysis ◽  
Shell Elements ◽  
Fea Model ◽  
Automobile Design ◽  
Housing Structure ◽  
Drive Axle ◽  
Drive Axle Housing

The performance of automobile drive axle housing structure affects whether the automobile design is successful or not. In this paper, the author built the FEA model of a automobile drive axle housing with shell elements by ANSYS. In order to building the optimization model of the automobile drive axle housing, the author studied the static and dynamic performance of it’s structure based on the model.

Analysis of the Crack of Heavy Dump Truck Cargo Body Floor

2015 ◽  
Vol 723 ◽  
pp. 3-6 ◽  
Author(s):  
Xiang Yin Liu ◽  
Da Wei Liu ◽  
Xiao Dong Cheng ◽  
Min Jie Si
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Maximum Stress ◽  
Basic Element ◽  
Dump Truck ◽  
Original Structure ◽  
Element Analysis ◽  
Shell Elements ◽  
Backing Plate ◽  
Fea Model

In view of the heavy dump truck occurred cargo body floor cracking problems in the process of using, this paper established cargo body finite element analysis (FEA) model with the shell elements as basic element, and calculated the strength of the cargo body floor by using the Hyperworks (a FEA software). The results of finite element analysis indicate that the crack took place because the stress of the connection of floor and support beam of front plate and the connection of floor and backing plate of turnover bearing was close to or exceed the material yield strength. On the basis of the calculation, we worked out the causes of the abnormal floor crack, which accord with the actual crack case. According to the requirement of practical process, the structure of floor was improved, thus the maximum stress value decreased 30% and 80.9% at two positions respectively, compared with the original structure, this shows that the improved method is effective.

Two Case Studies for the Effect of Beam Offset in Finite Element Calculations

2009 ◽  
Vol 37 (2) ◽  
pp. 87-97
Author(s):  
Nader G. Zamani ◽  
Nima Gharib ◽  
P. N. Kaloni
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Case Studies ◽  
Element Analysis ◽  
Shell Elements ◽  
Finite Element Calculations

This paper describes the effect of beam offsetting in finite element calculations. The effect is evaluated by considering two case studies involving beams, in which finite element analysis is performed with solid elements and with shell elements. It is seen that, under certain conditions, ignoring the beam offset can lead to erroneous results. Although the beam offsetting feature is available in most commercial codes, it is not always well documented.

Scar-Like Self-Reinforced and Failure-Tolerant Dielectric Elastomer Actuator With AgNWs Electrode

2018 ◽  
Vol 85 (3) ◽  
Author(s):  
Mingqi Zhang ◽  
Yuhan Xie ◽  
Tingge Yao ◽  
Xunuo Cao ◽  
Zhen Zhang ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Dielectric Elastomer ◽  
Silver Nanowire ◽  
Sem Images ◽  
Element Analysis ◽  
Membrane Rupture ◽  
Failure Location ◽  
Electronic Microscope ◽  
Mechanical Rupture

Scar structures of natural animals can reinforce the wounds both mechanically and biologically to maintain the functions of the injured muscle and skin. Inspired by the scar structure, we present a dielectric elastomer (DE) with silver nanowire electrodes possessing the scar-like ability. This DE membrane can tolerate the failures by both electric breakdown and mechanical rupture. The DE actuator (DEA) can maintain their performances of force and displacement output after multiple failures. Scanning electronic microscope (SEM) images show that the scar-like structures accumulate around the electromechanical failure locations on the DE membrane as the stiffened and insulated regions, which prevent further short current and membrane rupture. J-integrals and stress distribution around the failure location have been calculated by finite element analysis to verify the mechanical reinforcements of the scar-like structures over crack propagation.

scholarly journals FINITE ELEMENT ANALYSIS USING SHELL ELEMENTS ON RETICULATED STRUCTURES

2017 ◽  
Vol 2 (2) ◽  
Author(s):  
Alexandre Huberto Balbino Selhorst ◽  
Rafael Elias Meyer ◽  
Tatielen Pereira Costa ◽  
Liércio André Isoldi
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Von Mises Stress ◽  
The Finite Element Method ◽  
Element Analysis ◽  
Shell Elements ◽  
Final Weight ◽  
Verification Process ◽  
Von Mises ◽  
Von Mises Stresses

This paper studies the possibility of using SHELL elements on structures that are usually designed using BEAM or BAR elements. Using SHELL elements in such structures, named reticulated structures, opens the possibility to remove material from the structures’ members by adding holes. Once the members get holes, the final weight of the structure and material consumption will drop. In order to develop the study, a total of three different structures were analyzed using the software ANSYS®. This software uses the Finite Element Method to solve the equations originated from the designed structure upon it is meshed and the boundary conditions are set. Several results between SHELL and SOLID elements for each one of the structures were compared. The comparison of SHELL model with a SOLID model is used as a verification process, for SOLID elements are known to return accurate values. All of the meshes were tested by the independence mesh study to check its convergence. It is shown that the results are in a very good acceptable range with differences no bigger than 0.1 mm for displacements, and the map of von Mises stresses are pretty similar. Von Mises stresses for Finite Element Analysis for the C-Shaped Truss are shown in a figure comparing the results between the two finite elements used. This figure shows that there are no major differences between the SHELL and SOLID analyses. The Finite Element Analyses results were compared to analytical solutions, also. In this case, a noticeable difference in one structure for von Mises Stress was found. This difference, however, is understandable and reasonable, given the works presented on this paper.

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