Composites

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

Submitted by Venkat Bharath on Tue, 11/17/2009 - 11:27

Hi,

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

Submitted by rajeshkatta on Mon, 10/26/2009 - 09:41

Composites

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

Help in abaqus modelling

Submitted by Venkat Bharath on Tue, 10/13/2009 - 16:21

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,

First ply failure of composite panels using ABAQUS

Submitted by Ganesh Soni on Mon, 08/31/2009 - 16:53

Forums

Ask iMechanica

Choose a channel featured in the header of iMechanica

research

Free Tags

Composites

Buckling and Post buckling

Static Rik's

Tsai-hill craterion

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

Submitted by Fatemeh S. Imani on Thu, 05/21/2009 - 20:06

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

Post-doctoral Positions in Ultrasonics at the Ohio State University

Submitted by Ningyu Wang on Sun, 04/26/2009 - 22:56

nondestructive evaluation

adhesive bonds

polycrystalline materials

Post-doctoral positions are available in the area of ultrasonic material characterization and nondestructive evaluation (strong background and experience in ultrasonic experiment and modeling are required). The positions are supported from research grants and are intended for several years. The focus area is ultrasonic study of nonhomogenous materials like composites, adhesive bonds and polycrystalline materials. State of the art ultrasonic laboratories and other characterization facilities are available. More details will be provided to interested individuals.

Experimental analysis of prepreg tack

Submitted by LECAM on Wed, 03/25/2009 - 16:34

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.