research

Dear all,

In my FE model (pin on disc), I would like to define a contact property between pin and disc with a friction defination available in ABAQUS. I have assumed that friction coefficient depends on parameters like slip rate, pressure and temperature only. When i used friction coefficients with slip rate and pressure, model works without any error but if i use friction coefficients with slip rate, pressure and temperature, the model doesn't work and come up with following errors;

flexural rigidities of orthotropic composite laminates

Submitted by kaizen on Tue, 08/09/2011 - 12:47

Forums

Materials Forum

Choose a channel featured in the header of iMechanica

Free Tags

Dear all,

Iam working in composite orthotropic laminates consists of many plies having different material properties in each ply. How to determine or calculate the flexural rigidity (D) of this laminate by transforming these composite into an isotropic model. The idea is that flexural rigidity of the orthotropic laminate is being smeared into a single isotropic formulation.

For instance: if I have three plies:

Ply1 : D1x and D1y

Ply2: D2x and D2y

Ply3: D3x and D3y

A simple approximate expression for finite life fatigue behaviour in the presence of ‘crack-like’ or ‘blunt’ notches

Submitted by Mike Ciavarella on Mon, 08/08/2011 - 09:09

research

Fatigue

notches

After a long process (somebody may recall I made also quite some chaos on imechanica to complain with the review process in a previous journal), this paper was accepted. Ask me a preprint if you are interested. I can attach here a few images only.

M. CIAVARELLA

Politecnico di Bari, 70125 Bari, Italy

Received in final form 13 June 2011

Timescale Multiscaling in Atomistic Simulations of Experimental Nanostructures

Submitted by vikastomar on Sat, 08/06/2011 - 22:21

research

We all know most atomistic simulations in nanomechanics are performed on ideal materials that are not produced in laboratory and most experiments in nanomechanics are performed on materials that cannot be analyzed using atomistic simulations. Atomistic simulations indeed have a great capability in revealing a material's behavior with only constitutive law being used is that in the form of interatomic potential. The strain rate in atomistic simulations is of the order of 100000000 per sec which has not yet been achieved in any experiment or in a practical application.

Industry-level journal about FEM applications

Submitted by setareh on Sat, 08/06/2011 - 16:20

multi-scale FE simulation

Hi dear mechanicians,

I am about to publish the results of my MSc thesis in a journal. The thing is, my project was carried out in industry about multi-scale FE simulation of impact in composites. So it is merely an industry-level application of available methods.

I want to ask if any of you have any particular journal in mind, in which publishing such a paper is rather easy (doable) and does not have a long waiting list for review??

Looking forward to your suggestions

Thanx a lot

Setareh

Modified Cam Clay in ABAQUS

Submitted by nislamce_adfa on Fri, 08/05/2011 - 01:02

research

Hi All,

I am a new user in ABAQUS. I am interested to model soft soil of embankment using Modified Cam Clay model. I have modeled the similar problem in AFENA but in 2D. I am interested for 3D case. Can anyone extend co-operation, how to model soft soil in ABAQUS using Modified Cam Clay?

My email address: nislamce_adfa [at] yahoo.com

Thanks in advance.

Regards,

Nurul Islam

Comments on Cauchy's stress theorem

Submitted by Structrual Engineer on Thu, 08/04/2011 - 09:11

research

I have been bugged by this question ever since I studied cauchy's stress theory 10 years ago.

In cauchy's analysis of solids, there two popular geometries.

First one is a unit cube used for deriving equations of equilibrium.

And the second one is a tetraheadon used for deriving Cauchy's stress theorem.

In both the cases limit of force equilibrium as solid geometry shrinks to a point is derived.

My question has been, how come limit of force equilibrium at a point inside a solid depenent on the path taken by limiting process.

Subscribe to research