Blog posts

Running MD simulations with LAMMPS

Submitted by Nuwan Dewapriya on Fri, 10/18/2013 - 04:25

nanoscale tension test

LAMMPS input files

In appendix A of my PhD thesis, I share a MATLAB code to get coordinates of carbon atoms in a graphene sheet. The code also generates the data file required for LAMMPS. In addition, I included a sample input and the corresponding output files from LAMMPS. I hope this will be useful for those who would like to learn MD simulations.

Visual Molecular Dynamics (VMD) package can also be used to obtain coordinates of graphene.

ABAQUS: Trouble getting VUFIELD subroutine to work

Submitted by sscaleb on Fri, 10/18/2013 - 03:48

vufield

Hi all,

This is my first post on iMechanica. I'm a student at UC Davis working on my master's project which is a FEM analysis of a bridge footing. I've scoured the web, read and reread the Abaqus Documentation, and tried trial and error for a couple weeks on a problem, to no avail. Here's the issue:

Determination of Density of Laminated Composite

Submitted by Amin Khajeh on Thu, 10/17/2013 - 15:37

research

Determining Density of laminated composite.

Dear Engineers,

I would like to determine the density of laminated composite which consists of one lamina E-Glass/Epoxy and another one is thin layer of steel plate due to determining Young's Modulus through non-diestructive technique-Impulse excitation.

Any suggestions would be welcome.

var vglnk = { api_url: '//api.viglink.com/api', key: 'a187ca0f52aa99eb8b5c172d5d93c05b' };

COURSE NL14: NONLINEAR COMPUTATIONAL SOLID & STRUCTURAL MECHANICS. Theoretical formulations, technologies and computations.

Submitted by eli_compmech on Thu, 10/17/2013 - 15:11

We are glad to announce the 2014 version of the course:

NONLINEAR COMPUTATIONAL SOLID & STRUCTURAL MECHANICS. Theoretical formulations, technologies and computations. Pavia, May 5-9, 2014

2014 teaching body: R.L.Taylor, F. Brezzi, M. Bischoff, F.Auricchio, A.Reali, G.Sangalli

Please refer to the course web-site at: www.unipv.it/compmech/courses.html

Abaqus Subroutine and python subscripting

Submitted by rajnish0007 on Thu, 10/17/2013 - 14:35

research

Dear All,

I was wondering if anyone used abaqus user subroutines to couple the micro and macro models? If any one has used it and is also willing to share the knowledge?

I am looking for some guidance on how to run another *inp and get it's out put in the subroutine. any example on this is greatly appreciated.

Tenure-track Faculty Position at NC State

Submitted by Murthy Guddati on Wed, 10/16/2013 - 19:43

The Department of Civil, Construction, and Environmental Engineering (CCEE) at North Carolina State University (NCSU) expects a tenure track faculty position to be filled in the area of Structural Engineering and Mechanics. Exceptional candidates in all areas within structural engineering and mechanics are encouraged to apply; applicants with expertise in modeling of structural systems or materials are of particular interest.

Steady State Dynamics Vs Implicit Dynamics

Submitted by mandar.vaidya on Wed, 10/16/2013 - 16:47

Steady State Dynamics

Implicit Dynamics

800x600

Hello all,

There has been
much debate about the difference between Implicit and Explicit Dynamics. I was
wondering what exactly is the difference between 'Implicit Dynamics' and 'Steady
State Dynamics (SSD)' steps in Abaqus though it has been explained a bit in the
manuals.

Recent paper on the flattening deformation of metal columns

Submitted by Seyed Ahmad Elahi on Wed, 10/16/2013 - 16:44

research

This paper presents a theoretical and
experimental study on lateral compression of square and rectangular metal
columns. Some theoretical relations are derived to predict the absorbed energy,
the specific absorbed energy and the instantaneous lateral load during the
lateral compression. Analytical relations are obtained in two stages: elastic
and plastic parts. In the plastic zone, the total absorbed energy by the column
is calculated, based on the energy method. Then, an analytical equation is
derived to predict the instantaneous lateral load. In the elastic part, the
instantaneous load is obtained by linear behavior assumption. To verify the

Full time PhD scholarship at RMIT University, Australia

Submitted by Jie Yang on Wed, 10/16/2013 - 11:53

job

PhD scholarship (A$26,000 per year) is available at RMIT University, Australia. The
successful applicant will join our research team to work in one of the
following areas: (1) micro-/nano-mechanics; (2) mechanics of composite/nanocomposite structures; and (3) nonlinear structural dynamics and stability.

The perspective applicants
should

(a) hold
a MSc. degree in a closely related area;

(b) have
strong background in and good knowledge of solid mechanics, composite structures
and numerical modeling techniques;