Discussion forum w.r.t. CONTACT software

Herewith I announce to you that we created a discussion forum for topics related to our contact mechanics software on our website .
The idea is to facilitate discussions and information exchange between users,
and between users and developers.

As a start I initiated two topics:
 1) collect pointers to interesting information sources w.r.t. (rolling)
contact mechanics;
 2) discuss the possible extension of CONTACT w.r.t. more elaborate friction laws.

With best wishes,
Edwin Vollebregt

Abaqus "initial condtions"

Am writing as a statement in my model the option initial conditions, am not sure where is the excat palce so i run my file to identify the error "as follows" but still not knowing where to do so?!! (it said under level: Model)!!!

Thank you!

Hamed YN's picture

How to obtain array constants, A(N), in MPC subroutine Abaqus




/* Style Definitions */

simulation of the resonance of a metal structure ansys 12.1

is it possible to load (or simple harmonic ...) this structure to make it resonates and see the amplified strains.
What are the steps:
- I have already started extracting the natural frequencies (modal analysis I took 6 modes).
- I still have to apply a harmonic load F (t) = f 0 cos (alpha * t), I can not make this charge (I froze here)
- Instead it will force following the direction of the first response of the structure (the first nature-value) in the direction of the distortion along the + y axis (blue arrow)
Have you any solutions or examples to provide me

thank you answer me
P.S ansys12.1(workbench

simulation of the resonance of a metal structure ansys 12.1

simulation of the resonance of a metal structure ansys 12.1
mohanraj1987's picture


please tell if any body knows Step by Step procedure how to execute the problem described below....

My project is "Study on the behaviour of FRP strengthened concrete structures subject to cyclic load".

concrete 1500 x 100 x 200

CFRP: 460 x 50

Adhesieve: epoxy(sikadur 30): 460 x 50 x 0.01

Steel: 1500mm, 4mm radius, circular profile.

I have to do the following Steps using Abaqus/explicit

1. Modelling

2. Material Property

mohanraj1987's picture

Abaqus/explicit problems

Hi Frns,

            I'm doing project entitled, " Study on the behaviour of CFRP strengthened concrete structures subject to cyclic loading" both experimental and analytical part using Abaqus. ( All dimensions are in terms of SI units[N,mm,s])

                             concrete dimensions: 1500 x 100 x 200 (L x B x D), M40 grade, 

                              Steel: 1500 length, radius: 4. circular profile

Inter-laminar Stress For Analysis Composite Material With ANSYS

Hi There

I have analysed a composite part with ansys with solid46 element . I need to show layered stress in each layer for example stress in fiber or stress in epoxy. how can do that ?

please help me



Abstract: The braking operation is a process which converts the kinetic energy and the potential energy of the vehicle into other energies. The major part of the mechanical energy is transformed into heat. During the braking phase, the frictional heat generated at the interface disc - pads can lead to high temperatures.

[ANSYS] Composites. Problems using shell181 at postproc and tsai-hill criterion

Hi all,

I've modeled a composite sandwitch with ANSYS with a pressure. The element chosen was SHELL181.
I want to know the Stresses in the x, y and xy directions; the displacements and the deformations only in a few points so as to compare with the Navier and Rayleigh-Ritz solutions made following Reddy's book.

1.-The first problem is that I don't know how to ask ANSYS to list the displacements and deformations.

2.-The second one is that I know how to ask ANSYS to list all the elements in a layer,


modelling and simulation of lspring damper system in ls dyna

modelling and simulation of spring damper system in ansys ls dyna in drop test form plz guyss  help me out with this if any 1 can ................. regards

How to model spring damper system in ls dyna 12.1

hi how r u im doing a project based on landing gear struts system . i want to replace hydralic landing gear system by spring damper system in ls dyna . plz guys i need urgent help i m short ov time plzzz help me out

vinh phu nguyen's picture

A free program to generate interface elements in an existing FE mesh

Hello all,

Last year when I started implementing interface elements to model material failure, I realized that the formulation is easy except how to generate a mesh with interface elements. I did a googling to search for such a free program. Amazingly, I did not find any although there are many researchers working on the fracture mechanics field. 

So, I wrote a small object-oriented C++ program which reads a FE mesh, duplicates nodes and insert interface elements where asked. The program is able to 

(1) insert 1D/2D interface elements everywhere in a FE mesh

(2) insert i1D/2D nterface elements along material interfaces, useful for delamination analysis or interface debonding

ABAQUS user material subroutine VUMAT and Eulerian mesh...

Hi there,

 Has anyone ever used a vumat subroutine with Eulerian elements? it seems that the stress update formulation is different from the way it is in Lagrangian approach! If you have any experience in this regard I'd highly appreciate if you share it with me.


my first step with abaqus

hello i am in my first contact with abaqus  i worked with plaxis but i want to model a pile in cyclic load i think that abaqus is more complete than plaxis but can any body show me how to start using abaqus in geotechnical problem

best salutations

Couple field Analyses in Abaqus

i need to know how Couple field analyses i.e (Electrical-thermal-strucutral) to be done or can be done in Abaqus 6.10

interaction for a beam element embedded in a 3D solid block

Hi everyone,

 I am trying to model a beam element (which is supposed to work as a pile) embedded into a 3D block solid of soil.

the beam element (pile) is supposed to have 2 interfacial interactions; 1) tangential and normal contact at the end of beam element , 2) tangential and normal contact on the beam circumference. 

could anyone explain how to define this type of interaction?

I really appreciate that.


XFEM and Cohesive Behavior combined in Abaqus


I would like to combine Extended Finite Element Method (XFEM) with cohesive behavior in Abaqus to model bulk damage as well as interlaminar damage in a material.

Section 10.6.1 of the Abaqus 6.9 Analysis Users Manual says that XFEM "can be simultaneously used with the surface-based cohesive behavior approach or the Virtual Crack Closure Technique, which are best suited for modeling interfacial delamination."

Does anyone know if XFEM can be combined with element-based cohesive behavior?


Thank you,


Modeling sandwich composite in ANSYS

Hi, i need help modeling sandwich structure in ANSYS 12.1, i have found some materials online on how to do it? I have tried the basic steps. got some results, but now how do i validate that.   I have experimental data for three point bending. But i want to make sure that what i am doing in ANSYS APDL is darn right. 

inputs are,

3 layers 45/0/45

thickness 0.1/0.365748/0.1   (inch)

IOSOnier's picture

IOSO Optimization for Turbomachinery new Video Tutorials


We would like to offer you step by step Video Tutorials of IOSO Optimization coupled with Concepts NREC and NUMECA software:

1) by this we show how easily you can use direct integration capabilities between IOSO and Concepts NREC software to solve optimization tasks in turbomachinery

2) here we consider IOSO – NUMECA coupled solution on the example of an optimization case study for turbomachinery

Liu Jinxing's picture

How to combine XFEM and UMAT in ABAQUS?

I have an idea: In abaqus, I want to simulate crack propagation by XFEM, and meanwhile I also want to define the stress update algorithm by writing a UMAT.
Anybody wants to share related experiences?

Help with Abaqus Scripting


I am new to abaqus scripting. I need some help with accessing the odb for history output.

I have a list of odbs and i need to take the displacement and contact stresses information at the end of the step.

The syntax i tried was

import odbAccess

fileName = 'static_open_c1.odb'
stepName = 'Load'
historyRegionName = 'Node HS-1.701'
historyOutputName = 'U2'


But i am not able to get any response from it.
I kindly request someone to shed some light on my issue.



I'm trying to investigate the effect of multiple support excitation (spatially varying ground motion) on seismic response of an arch dam using ADINA, so i need to apply different acceleration (and velocity and displacement) time histories on every node on structure-foundation interface.

is it possible in ADINA?
is ADINA capable of multiple support excitation analysis? if not, i have to develop a subroutine to evaluate quasi-static response and multiple support excitation dynamic response and sum them up. how can subroutines be added on ADINA?

Abaqus - Gear in motion: static or dynamic?

Hi all,

I've to model a gearbox in the transitory (acceleration) and in the
stationary (constant speed) running: i'm not sure abut the kind of step
to use.
I'm gonna find contact pressure and stress in both case.

What about using static step for both?

ABAQUS modelling of rotating smeared crack model

I want to know if it is possible to accomplish crack analysis in concrete by using co_axial rotating smeared crack model in Abaqus?

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