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Gain Business Value from User Experiences - Check out this SCC guide

If you haven’t attended a SIMULIA Community Conference before then check out this e-book of select past conference papers to see what you’ve been missing.

Problem with abaqus : shell-solid assembly

Hello everyone !

I'm new to abaqus and have a problem with the shell-solid assembly. I want to model a shell element (plate) clamped into two solid elements (parallelograms) on its top and bottom edges.

I've tested different possibilities to do my assembly (shell-solid coupling, merging the geometry or the mesh when assembling the two elements) but none of them work. There's always a problem whis the definition of the elements' properties when I submit the job.

Does anobody have a solution ?

Stacking of DOFs in Abaqus

I am studying the response of a bridge in MATLAB, and have successfully retrieved mass and stiffness matrices from Abaqus using the following keywords:



*Matrix generate, STIFFNESS, MASS


*End step 


This gives matrices on a mathematical form, very well suited for use with MATLAB. 

Postdoc opportunity in the field of computational mechanics


New Technologies Research centre at the University of West Bohemia
(Czech Republic) invites applications for a Postdoctoral position in the
field of Computacional Mechanics of Materials. Highly motivated
individuals holding a PhD in Mechanics, Materials Science or closely
related fields are encouraged to apply.

Aqua load by python

Dear All

I am quite new in this area.

Somebody can give me an idea on:

How to impose aqua loads by phyton scripting in abaqus?

Thanks in advance


Soud Choudhury's picture

Need help for running UMAT of Dr. Huang's single crystal

Hello Everyone,

I am a new member of imechanica. I have started to learn UMAT of Abaqus to model my material behavior ( Cu6Sn5, HCP) using crystal plasticity finite element model. I found Dr. Huang's single crystal UMAT to start learning UMAT and I thought that it would be a great guide to start though it is written for FCC mat. But unfortunately I was not able to run the UMAT with it's input file.

Finit element Analysis of mandible bone with implant

Hi everyone
i work on a bio mechanic project. i am going to simulate a mandible bone
with implant. at first i want to use Materialise Mimics V10 to convert Ct Scan
data of a mandible without implant to a 3D model. i thought i could edit
the exported file on the other software (Ansys or Abaqus) to add the
implant. but, exported file from mimics can not have any edit .Actually
it has not volume and i need to have a 3D solid model. please help me !

Preprocessing files for ABAQUS XFEM implementation

Choose a channel featured in the header of iMechanica: 



This is my first post in imechanica and i hope you can help me, im working in my finall project to obtain my MsC, im working in the simulation of crack growth in freeting fatigue, i found usefull the article post in imechanica by Eugenio Giner node/4338. Im having problems with the preprocessin files, Can you help me with some information about how to create the input files? (i have some basics using ABAQUS CAE, but i dont know how to create the input files like mOXY.prn, TopNox see article)


SIMULIA's picture

Hear what Abaqus users have to say about the SIMULIA Community Conference

2013 SIMULIA Community Conference

May 21-24, 2013

Vienna, Austria

Connect with international users at this collaborative community event.

Highlights include keynotes from BMW Group and Ethicon Surgical Care,
Inc. (a J&J company)
and over 90 use-case presentations on Abaqus,
Isight, and Simulation Lifecycle Management.

Listen to what past attendees have to say.

Cyclic loading abaqus

Hi colleague


can you help me to define a cyclic load of 1 kN (120 cycle per min ) in Abaqus?

does it diifrent to use static or dynamic analysis?


characteristic Length



is there a way to get the characteristic length of one element? I wanna calculate xult (when the element is cracked, fracutred..). 

 I use the concrete damage plasticity model and after reaching the tensile strength i assume a linear softening with fracture energy.


Input are:

   Young´s modulus

   max. tensile strength

   fracture energy



   when do i reach xult or what is the plastic strain equivalent

Jing_Yang's picture

Would you like to recommend some ebooks on computational nonlinearity?

Hi, everyone:

    I'm recently very interested in computational nolinearity. Would you like recommend some monographs on the computation nonlinearity so that i can have a better understanding of the mechanism of ABAQUS.



Jing_Yang's picture

An example employing smeared crack model in ABAQUS documentation cannot converge?

 Dear all:
    I recently find an example in ABAQUS documentation cannont convergence.
    The parametres related with the iteration of the Risk method is 


Hi colleague

 does anybody know, what is this strange error :   Error in connection to analysis

i am trying to model fracture mechanics on piezoelecteric material, when i select the piezoelectric as a familiy in mesh part, then when runing the model, i recieve this error. if anybody knows how to fix it please help me.thanks 

reading nodal values (EFENRRTR) into a UMAT routine


I am using the VCCT method to model crack propagation and I am finding the value of G/Gc is too large for any sensible time step (1e-25).

I am attempting to incorporate a time incrementation scheme into my UMAT which monitors EFENRRTR and modifies the time step (or PNEWDT) according to it's value.

Simulation of fracture toughness test

Choose a channel featured in the header of iMechanica: 

Hi, I am new to ABAQUS. I want to simulate the fracture toughness test to predict the behaviour of materials(brittle/ductile). Please help me how can I proceed?

If possible give me some guidelines and if you have any documents regarding this topic kindly send it to:

Thanks in advance for your valuable suggession.

SIMULIA's picture

BMW and Ethicon Endo Surgery to Keynote 2013 SCC

We are pleased to announce the keynote presenters for the 2013 SIMULIA Community Conference! Hear firsthand how BMW Group and Ethicon Surgical Care, Inc., a Johnson & Johnson company, use SIMULIA solutions to stay ahead of the competition—keynote presentations by:


Rudolf Blaim - Department Manager Requirement Management and Verification in Process IT Idea to Offer, BMW Group

David Smith - Principal Design Engineer, Ethicon Surgical Care, Inc., a Johnson & Johnson company


Xiao Hu Liu's picture

Position for expert FEA analyst available at Dallas area, Texas

Please apply online. Do not contact me; I do not work in the company.

The Research and Computer Aided Engineering group at Carrollton Technology Center of Halliburton is looking for an expert FEA analyst at principal engineer level. This position requires

SIMULIA's picture

Simulation of Hail Impact Using the Smoothed Particle Hydrodynamic Method in Abaqus/Explicit

Ice or hail impact is an important design consideration in the aviation, energy, and astronautics industries.  Physical testing of impact scenarios can be expensive and impractical.  Numerical simulations provide cost effective and convenient tools for including hail impact scenarios in the design process.

Maximum Time Step Problems in ABAQUS


 I hape a relatively simple question. I am trying to set a maxmimum time step for a job by the lines:

*Static, allsdtol=0, continue=NO

0.05, 1., 1e-25, 0.05


so I believe the maximum time step should be 0.05 giving me a minimum of 20 increments in the step in total. However the STA file below shows that the job starts at 0.05 and the appears to ignore the maximum time step command. Can anyone tell me why this occurs?

 Abaqus/Standard 6.10-2                  DATE 08-Jan-2013 TIME 14:29:13


loop inside a .psf file (parametric study file) in abaqus to get field variable output

Dear all,

Does anybody how we can put a loop (for example while loop) inside a .psf (parametric study) file in abaqus?

For example a loop on all the increments we want to get a field variable output. Take a look at the following code:


Ramping initial stress in Membrane elements

I am doing an explicit analysis, i am trying to model a woven fabric structure. I have to pre-stress the fabric so i have used this option. 


Details from INP file

*Membrane Section, controls = SC, elset=FABRIC, material=FABRIC

*AMPLITUDE, NAME = RampStress, DEFINITION = Smooth Step,time=total time
0.0, 0.0, 0.0025, 1.0, 1.0, 1.0


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