A new tech brief was recently released on composite optimization. See below for additional information:  

It is pleasure to announce that there is an
opening for students who want to join a PhD course or combined master + PhD
course (Going to directly Ph.D. course without master thesis after B.S.) in
Department of Aerospace Engineering, GyeongsangNational University, South
Korea.

Please find attached a report on a comparison between ANSYS SHELL181 and SOLSH190 elements with particular emphasis on applicability to linear elastic sandwich panels.

Title: Comparison of Ansys elements Shell181 and Solsh190

Abstract:

July 4, 2011Opening for Research Fellow Position in Composite Structures

Hello all,

I am doing my masters thesis on composites.Its material with cnt yarn embedded in steel.I modeled cnt yarn as solid and matrix as soilid and glued them together.the values of youngs modulus for yarn is lower than that of the matrix.I obtained some results on stresses bt the maximum stress is seen along the tip tranverse to the ysrn axis?I hope the stress should be around the yarn.

I am using ansys 13 for the analysis.Could you please help me in soving this problem???

Shrestha 

My book on metamaterials, "An introduction to metamaterials and waves in composites" has been published on June 16, 2011 by CRC Press (Taylor and Francis).

The book is meant for students, researchers, engineers, and educators who want to get a basic grounding on the theory that is the basis of recent excitement about negative materials, cloaking, transformation optics/acoustics and other wave phenomena in composites.

Hi all,

I've modeled a composite sandwitch with ANSYS with a pressure. The element chosen was SHELL181.
I want to know the Stresses in the x, y and xy directions; the displacements and the deformations only in a few points so as to compare with the Navier and Rayleigh-Ritz solutions made following Reddy's book.

1.-The first problem is that I don't know how to ask ANSYS to list the displacements and deformations.

2.-The second one is that I know how to ask ANSYS to list all the elements in a layer,

[code]ESEL,S,LAYER,,1,12,1
ETABLE,TABLE_Sx,S,X
ETABLE,TABLE_Sy,S,Y
ETABLE,TABLE_Txy,S,XY
ESEL,ALL[\code]

Hello all

 I am trying to model a composite material with different tension and compression modulus (elastic analysis).  Does anyone know how to do it ??

Thanks for help.

There is a lot of homogenization theories based on penetrable model or some other name like 'overlapping', 'randomly imbedded model' to analyze random microstructure. In reality, the fibers or inclusions can not be penetrated into each other, so why they use this assumption anyway?

 Thanks for your opinion.

Recently I have some reseach on z-pinned composite. I hope use finite element method to analyse the unit cell . I found a FE code called FLASH mentioned in many papers. I think the code will be helpful to my work.But I can not got the code form my resource. So,I ask help in the forum. Two papers about the code are given in below. I am very expect for your help!!!

My email:applexie007@gmail.com

 1.J.Y. Shu and N.A. Fleck., User's manual for finite element code for fibre microbuckling.
Technical Report CUED/C-MATS/TR.224, University of Cambridge Department of
Engineering. 1995.

Dear Abaqus Users,

I would like to model 3D composite structures using Hashin Damage model in ABAQUS. I have seen in ABAQUS manual that Hashin damage model is applicable only for shell element. I would like know whether I can use 3D element available in ABAQUS. Any help would be higly appreciated.

Parimal

Research Scholar

Michigan State University.

Hi

Am currently running Ansys analysis using shell181, and Tsai-Wu FC, have some good working first ply failure models

Trying to convert this into a progressive failure model, with no luck so far.

Anyone know something about this, how it could be done?

I suspect by looping, and fortran code, but I do not really have a clue..

Hi,

i am looking for a free tool to create radial/radar plot for youngs, shear modulus

and poissons ratio (diagramms showing properties as a function of the angle).

so far i found one excel / vb based one but it is very basic.

Any suggestions?

Schuffy

Hi all,

 I am looking for any literature on the solution the analysis of composite plates with multiple holes in them. I have been able to find plenty of information about single holes in composite plates but none on multiple hole interaction, hence this call for help.

Thank you in advance,

Fernando

can anybody help me in performing orthogonal machining in carbon fiber composites using ABAQUS/EXPLICIT????

regds arun...

Hi Everyone,

I am doing a project in which I am trying to study about the
drilling of composite. The aim is to optimize the drill and process
parameters to minimize the damage. For this I have tried to simulate
the drilling process in ABAQUS and I am using the Hashin damage model.
The problem is that Hashin damage model works only for the lamina which
takes only plane stress elements. Since only plane elements are allowed
I am unable to simulate cutting action of drill as the composite plate
is effectively 2D.

 When I take 3D elements then Abaqus shows error that Hashin damage
model cannot be applied for that plate. Also there is no other damage
model for composites in Abaqus.

hi guys, im new to abaqus.

anyone know how to model a unidirectional composite laminate in abaqus?

Hello,

 Pardon my basic question.  I need to model a carbon fibre sheet using Abaqus 6.7.  I cannot seem to get the composite layup tool to work properly and I do not know how to define the material properties for carbon fibre.  Are there any good online turorials I can use to do this?  My part will be 8-ply, 125mm square, ~1mm thinck.  Any help is appreciated.

Thanks,

Tyler

Hi All,

I am analysing a fiber composite solid plate with a large and small holes. The model is meshed with C3D8R elements. The output has U and RF in global CSYS and S, E in local CSYS. I have problem in reading  S and E written in local CSYS. I know it is very simple, but I cant able to figure it out. Those who know, how to read the S and E in local CSYS, please help me. Tks in advance for your time and advice.

Regrads

Jacob