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Good News, International Journal of Applied Mechanics  IJAM has been indexed by SCI.

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 

French spoken

Supervisor: E. Charkaluk CR HDR, CNRS, Ecole Centrale de Lille

Co-supervisor (s) A. El Bartali (Ecole Centrale de Lille) & V. Magnier (USTL)

Contact: A. El Bartali & V. Magnier
E-mail: ahmed.elbartali@ec-lille.fr and / or vincent.magnier@polytech-lille.fr

hello everyone..i am working on project of self healing study of Glass fiber reniforced polymer (GFRP) composite. i want to know how we can induce a micro crack in GFRP and is ther any technique except SEM to know the condition of crack.

Thank you

iMechanica is a fabulous resource;  just wanted to say a brief thank you to all who put this together.  Thank you!

how we get the moment diagram from the stress if the ABAQUS is available for shell element

Dear all,

Pls be informed that I am using abaqus explicit to model my
pipeline that
embedded in soil. In standard, Coord 1 means x co-ordinate,
coord 2 means Y
co-ordinnate and coord 3 means Z -co-ordinate. But I can not
undestand the
meaning of CoordMP(nblock,j) in explicit. I want vertical
co-ordinates of some
elements of my model but if I put CoordMP(k,2) it shows
always a constant value
for all elements which make no sense.

Can you
please explain it(CoordMP)? It will be a great help for me.

Hi 

    I want to print complete assembeled mass, stiffness matrices  in ABAQUS. I was trying for this. I got some clue for this as follows:

*STEP
etc
etc.
*ELEMENT MATRIX OUTPUT, OUTPUT FILE=FILENAME.EXT, MASS=YES, STIFFNESS=YES, ELSET=ELSET_NAME

*END STEP

Hi everyone,

      I just constructed a VUMAT which including 3 state dependent variables ( nstatev =3 ), let say these three state dependent variables each have a initial value of 10, 20 and 30, may I know how to assign these initial values into the simulation or VUMAT?

      So far I follow the manual to assign the initial value via input file with material properties command as below (the line started with "*Initial Conditions" is line 361):

Hi,

I am searching on multiscale simulation of polymer/metal ( mechanical propertices).

Cohesive zone model is used for this porpose.

Is there another models that can use for this issue and using MD data as input?

Best regards,

Hamed

Hi, everyone:

A rectangular plate, simply supported at four edges, subjected to a partial load- a uniformly distributed pressure over a round area at the plate center. What is the analytical solution for the plate deflection?

Hi readers, 

 This is MATLAB code that was written by myself and collaborators that we've sought to make available to the wider research community. The program is intended to track the displacements of micropatterned dots on a substrate in a similar manner to that performed by  Maloney et al. in "Influence of Finite Thickness on cellular adhesion-induced deformation of an compliant substrata". Physical Review E. 2008.

Creep can be characterized as the result of a solid material that is slowly and permanently deformed under the influence of stress. Deformation results from the consistent stress below the yield strength of the material. The amount of applied stress and its duration can eventually lead to the failure of the given material. Ultimately, it is for this reason that Nanoindentation creep measurement provides crucial information to study material behavior.

I have attached notes prepared to better understand locking. This might be useful to FEM guys....

Hi all,

     I want to set up a critical shear strain - normal stress criterion, in UMAT by prof. Huang. For the strains it is easy to get a critical strain along a slip plane; but for the stresses the notation is quite weird. It is not the same! See below:

C       Array STATEV:

C       3*NSLPTL+1 - 6*NSLPTL  :  current components of normals to slip

C                                 slip planes

Hi iMechanica,

I want to start a discussion on the current status of DEM modelling of granular media. I know that Luding has published many papers in this area. Please add to the current research on granular flow modelling like viscoplasticity, hypoplasticity etc and the  numerical DEM methods.

Hello

I want to solve a system of partial differential equations (Navier-Stokes with continuity and momentum equations in one-dimension) using a finite element routine. I have several questions:

1. How to couple the two equations (continuity and momentum) into a single system with a single solution.

2. Apart from time, I have two unknowns: volumetric flow rate (Q) and pressure (p). Should I consider these as two degrees of freedom on each node in the domain.