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KennyNg's picture

Transverse moduli for composite

I'm currently working on modeling 3 phases composites material. However, I'm having hard time on finding the transverse modulus as it's different from analytical results. I've been using Mori-Tanaka approach to determine the stiffness moduli. Does anyone know how to obtain a correct values for the transverse moduli? 

jansen's picture

PhD candidate position in structural mechanics

The Graduate School MUSIC and the Institute of Structural Analysis at Leibniz Universität Hannover invite applications for a PhD candidate position (Salary scale TV-L E13).

jansen's picture

3rd ECCOMAS Thematic Conference on the Mechanical Response of Composites 2011, First Announcement

The Institute of Structural Analysis (ISD) organizes the ECCOMAS Thematic Conference on the Mechanical Response of Composites from 21st - 23rd September 2011 in cooperation with the German Aerospace Center (DLR), the Graduate School on Multiscale Methods for Interface Coupling (MUSIC) of Leibniz Universität Hannover, and REpower Systems AG.


v.tagarielli's picture

PhD opportunities @ Oxford (for EU / UK nationals)

Dear iMechanica commmunity,

we are looking for 3 PhD students at Oxford, starting from the 1st of October 2010 or as soon as possible thereafter. The closing date for the application is the 26th of July. The 3 students are required for two different research projects, namely:


1) Underwater blast on composite structures - open only to EU nationals; 2 PhD students are required. The studentships are advertised here

Dr. Rahul Chhibber's picture



I welcome and encourage all my fellow imechanicians to participate in the international conference being organised at Thapar university patiala,  punjab, india during november 2010.

The details regarding the conference and research paper format are attached.

for further queries log on to, or or email at

Rahul Chhibber

Bent F. Sørensen's picture

Open position: Senior Researcher in the area of processing of polymer matrix composites at Risø DTU, Denmark

The Materials Research Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark, is seeking candidates for a Senior Researcher position in the area of processing of polymer matrix composites to develop innovative strategies and to improve current methods of manufacturing polymer matrix composites for the energy and transport sector. 

Risø DTU has close collaboration with the leading wind turbine blade manufactures such as LM Glasfiber A/S, Vestas Wind Systems A/S and Siemens Wind Power A/S.   

A post-doc position in the field of Composite materials (GNU, Korea)

A post-doc position is currently available at the Research centerfor Aircraft Parts Technology in Gyeongsang National University (Jinju, SouthKorea).

The research project will be based in the Research centerfor Aircraft Parts Technology in Gyeongsang National University. The researchwill be supervised by a principal investigator of the project (Prof. Jin-HweKweon).

Twebb83's picture

Webinar Series: Containers, Spacecrafts, Wind Energy

Simulation Driven Design for Containers
Tuesday, March 9 – 11 a.m. EST
>> Register now

Simulation Solutions for Spacecraft
Tuesday, March 16 – 11 a.m. EDT
>> Register now

A Postdoctoral Position (£30,594-£32,458 pa) Available in Computational Mechanics in Liverpool UK

Closing date for receipt of applications: 30 January 2010You will join a research project “Optimise blast resistance of novel composites made with fibre metal laminates (FMLs)” sponsored by the Leverhulme Trust. The project will be jointly supervised with Prof. Cantwell who is an expert on testing of novel composites.

Venkat Bharath's picture

Cohesive behaviour for Interaction in Abaqus Explicit at the interface of materials

I am working on effects of Blast Loading in sandwich composites using Abaqus. I want to incorporate Cohesive behaviour at the interface of the two materials in the sandwich composite structure i am analysing.

Umat-Help-Progressive Damage modeling

Hiii All,

 I am writing an umat for Progressive Damage modeling for 3d Composites.

  when I am compiling my Umat i got an error which says

The executable /raid/software/64/abaqus/6.8-1/exec/standard.exe
aborted with system error "Illegal floating point operation" (signal 8).

I checked out my code many times but i dont find any wrong,Can any one please help me out to resolve this issue.

If some one needs my subroutine file i can send it to them provided te email address

Venkat Bharath's picture

Help in abaqus modelling

Hi all,

 I am currently working on my Masters thesis which is the analysis of sandwich structures subjected to blast loading using Abaqus. Can someone suggest some references which would  explain me how to apply blast loading using abaqus. 

There is an example problem of submarine in the abaqus user's manual which includes the blast loading. But they've only given the inp file for that. 


So can someone also tell me how to generate .cae file from .inp file in abaqus.


Best Regards,

Ganesh Soni's picture

First ply failure of composite panels using ABAQUS

Choose a channel featured in the header of iMechanica: 

I am using ABAQUS Software for analysis of laminated composite plates (279X279X2.16) and (0/90)4s having 16 plies; trying to perform Buckling and Post buckling analysis using Static Rik’s algorithm.

Firstly, Eigen value analysis is performed in step one, and thus bulking load is predicated.Then Eigen values are incorporated in Static Rik’s Non-linear analysis for imperfection (1% of first Eigen mode,0.05% of second Eigen mode, 0.025% of third mode and 0.025% of forth mode)using edit keywords method.

Fracture Mechanics vs. Damage Mechanics

I was wondering what are the advantages of damage mechanics and fracture mechanics over each other? Specially in order to model the delamination phenomenon.

LECAM's picture

Experimental analysis of prepreg tack

Dear all, I post a study dealing with tack of prepreg materials. This kind of composite materials is increasingly used in the design of structural parts, particularly in the aerospace industry.Tack is one of the major properties that governs the ability of prepreg to be laid up. To investigate this property, we have developed a probe tack test to evaluate the effect of the temperature, the contact time, the contact force and the debonding rate on it.

Twebb83's picture

Abaqus Users' Conference - now the SIMULIA Customer Conference

2009 SIMULIA Customer Conference
May 18-21, 2009 • the Brewery, London, England

Impact in Composites


I'm doing some research in aircraft protection against impact, mainly refering to UAV's protection of the payload (avionics,etc..) during crash.

Does anyone knows where I can get some info about related topics (impact in composites, collision protection, reinforcement of structures, etc..)?


Thanks, Ivo Pires

ANSYS shell99

Choose a channel featured in the header of iMechanica: 

Does anyone knows what's the theory of the element shell99 in Ansys? I tried to search in ANSYS Help, but didn't find anything. Is it kirchoff classical plates theory?

Position: Post-doc at the Univ. of Auckland, New Zealand

Project Title: Advanced Modelling and Simulation of Closed Mould
Composite Manufacturing Processes
Applications are invited for a postdoctoral research position on composite manufacturing processes with the Liquid Composite Moulding (LCM) Group at the University of Auckland. The successful candidate will play a major role in developing the LCM group’s research into advanced composites manufacturing processes (including I/CM, Resin Infusion, VARTM, and RTMLight).

Ansys Help

Hi All

I have just started my postgraduation in aerospace composites. I am new to FE of composites and required serious help in learning composite modelling. It will great if someone can help me in starting up. If you know any websites or books which have examples which I can go through to learn modelling of composites, please let me know. Thanks for your help.




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