research

Modeling of the muscle-like actuation in soft dielectrics: deformation mode and electromechanical stability

Submitted by Bo Li on Sat, 12/01/2012 - 13:08

Soft dielectric elastomer is able to generate an

electromechanical response in terms of reversible shape

changing, which is a muscle-like behavior. The deformation

and electromechanical stability of dielectric elastomers,

classified by their deformation modes, uniaxial extension,

equal biaxial expansion and pure shear, are investigated.

Pull-in instability occurs in equal biaxial and uniaxial modes

at a small stretch ratio, while the pure shear mode features

wrinkling instability after a large stable deformation. The

Ultimate Mechanical Engineering Project- Clean Energy

Submitted by Jigar Y. Patel on Sat, 12/01/2012 - 06:31

research

multibody dynamics

mechanical engineering projects

mechanical engineering design

mechanical video

mechanical final year project

plotting force- displacement

Submitted by Pooria kh on Fri, 11/30/2012 - 12:32

research

impact mechanic- thin-walled structure- tube- energy absorption

Dear friends

I want to plot force-displacement figure for simulation of axial impact in Abaqus; after using reference points for defining the
displacement and force in tubes and plates , I encounter
two problems:

1) 1)Amount of forces are
negative.

2) 2)I need to filter the figure
because forces have some vibrations in the figure and they are not zero after rebounding;
they have sine form. So, I have to filter them?

Please let me know how to solve
it.

XFEM convergence problem(the problem has converged, along Meshsize not...)

Submitted by zsc13810288137 on Thu, 11/29/2012 - 17:11

research

Has anybody experience with convergence study of XFEM?

Hallo,

i have the following problem, when i refine the mesh of Mode I fracture with XFEM, the Force Displacement curve seems not to converge.

Mesh Size:

15*15

25*25

51*51

75*75

the reaction force is going to be smaller and smaller...

can somebody help me? thank u very much!!

ask for some papers

Submitted by IUT student on Thu, 11/29/2012 - 16:15

research

Hi dear all

i want to ask you help me for downloading some papers and sending me by Email.the URL of this papers are written below.I will appricite your help.

thanks alot

REGARDS

http://www.scopus.com/record/display.url?view=basic&eid=2-s2.0-0020513893&origin=resultslist

Viscoelastic Effects on Electromechanical Instabilities in Dielectric Elastomers

Submitted by Harold S. Park on Thu, 11/29/2012 - 12:44

electromechanical instability

dielectric elastomer

Viscoelastic

Recently accepted for publication in Soft Matter:

(http://pubs.rsc.org/en/Content/ArticleLanding/2013/SM/C2SM27375F)

(http://dx.doi.org/10.1039/c2sm27375f)

help needed in writing matlab code for finite element analysis of composite with piezo layers

Submitted by chakry84 on Mon, 11/26/2012 - 06:14

research

hi everybody,

the element that i considered is 8 noded 2d isoparametric element. composite consists of 5 layers out of which the top and bottom are piezo layers. please help me in writing matlab code for the problem specified .

Solutions of contact problems using surface and gradient elasticity theories

Submitted by Xin-Lin Gao on Fri, 11/23/2012 - 16:01

research

elasticity

contact mechanics

These two papers have recently been published on-line in ZAMP:

http://link.springer.com/article/10.1007/s00033-012-0205-0

http://link.springer.com/article/10.1007/s00033-012-0273-1

DOFs in Abaqus

Submitted by salingerv on Fri, 11/23/2012 - 15:53

Hi,

I got a simple 2D problem (a rectangular shell, static general, CPS4R element), with 557 nodes, each of them have 2 DOFs (U1 and U2), according to the data file. But when I print out the ELEMENT STIFFNESS MATRIX, for each element it is a 12x12 matrix which means the rotational DOF about z axis is also taken into account. How can I omit this 3rd DOF? Can I?

Thank you.