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Modeling Metal forming in Abaqus...

I'm currently working on my master thesis which is in the area of metal
forming simulation...

I have one question,,, when adding material plasticity in Abaqus using the
power law...

to what limit shall i go in the tabulated form is it to 100% plasticity or
to the maximum strain the material can take...

 in other word,,, if the power law is: σ =250*εp^0.123...

shall i inter the values till at σ=250, ε=1... or shall i stop at let say ε=0.25...

Regards,,,

Was

Output of ABAQUS for contact of a rigid surface with a poroelastic layer

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Hello, I am modeling the spherical indentation of a poroelastic layer. I am modeling the indenter as a rigid analytical surface. As you know, the total pressure in a porous medium at each point is the sum of the elastic stresses from the matrix, and the pore pressure caused by fluid pressurization. Abaqus provides both the pore pressure and of course the rest of the stress quantities.

Johannes T.B. Overvelde's picture

Abaqus Script Manual/Tutorial

I have written a introduction manual/tutorial on Abaqus Scripting. I got some good feedback from my colleagues. Therefore, I would like to share the manual.The manual should give a short introduction (it will not take more than one hour) to Abaqus script in Python.

You can find the manual here:

Abaqus Script Manual

Via the same link you can also find more information on the connection between Matlab and Abaqus

Good luck!

UEL

Dear Friends,

I have written a UEL for Strain Gradient Plasticity and is working well when i give Boundary condition as Concentrated force, But when i apply displacement boundary condition the it leads to 'system error 144'.

Iknow that system error 144 corresponds to division by zero or infinity, but then why it is coming in on displacement boundary condition is i am worried about.

I will be extremely helpful to anybody for any type of help on above problem.

Thanking you in advance

Soham

Simulation of wave propagation in ABAQUS/CAE

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Hi, I am working on modeling wave propagation in ABAQUS/CAE.

I am not expert on ABAQUS and trying to figure out how it works.

I have a 2D Shell steel plate (1 centimeter by 1 centimeter) and try to obtain wave speed at any points of plate.

I put the material properties in and used ABAQUS/Explicit analysis.

Time steps are 1E-009 seconds and there are 2 steps (impulsed at the first step and propagates at the second step).

The load pluged at the amplitude with equaily spaced for 0.1 micro seconds (so it becomes impulse load).

UEL

Dear Friends,

I have written an UEL for Strain Gradient Plasticity but it shows following error :

FE SOLVER AND MESH HAVE INCOSISTENT NUMBER OF DOFS

I will be very thankful if someone can throw some light on this error.

Thanking in advance.

Soham

How to plot Stress Contours from ABAQUS UEL?

Hello, I am using the Abaqus UEL module to use a customised element type. I have all the  stress values at the Gauss Points (3x3 Gauss Quadrature) which I have exported through the SVARS variable. Is there any way I can plot the stress contours on the geometry in Abaqus or any other software ?

Thanks,Sourish

How to view random material properties in ABAQUS

In ABAQUS, I have 100*100 elements and the material properties of each element (say elasticity, angle of friction) varies. How can I view (plot) the mesh as per material properties value (say elasticity) (like colorbar)

Convergence Problem using Biphasic Material to model hip joint in Abaqus

Dear All,

i am new to this forum and would like say hello to everybody!

I am currently working on a hip joint model consistent mainly
of the cartilogenous tissues. Biphasic Materials consitent of
a linear elastic Matrix and trapped fluid, which i modelled in
abaqus using Soil Mechanics (permeability).

At the moment, however, i am unable to obtain convergence. The
whole calculation stops at ca 0.122 sec out of total 1 sec. I
guess its just one parameter set wrong in Contact or an convergence

omabderhman's picture

soil in abaqus

Blessings upon all,

I am new user in ABAQUS ,can you give me links to learn the soil models in abaqus.

 

Mukunda Madhava Nath's picture

Residual Stress Modal Analysis in Abaqus

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I want to do modal analysis of a simple structure under the effect of residual stress. How can I do it in Abaqus ?? I need the precise steps to do with the GUI.

St. Venant-Kirchhoff constitutive law in Abaqus

I would like to conduct simulations in Abaqus using a St.
Venant-Kirchhoff constitutive law, but when I try to define a material
in Abaqus CAE I do not see it as an option.

 

Is this available as a
built-in model?

 Is this just another material model with a parameter set to a specific value? (Hyperelasticity isn't my strongest area.)

Concrete beam with piezoelectric sensors in ABAQUS

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Hello,

 

I am trying to model piezoelectric sensors on a concrete beam in ABAQUS. Since I am using brttile cracking model, I have to use ABAQUS / Explicit. But piezoelectric elements are not available in ABAQUS / Explicit.

In some papers I saw that the piezoelectricity modeling problem in ABAQUS / Explicit is solved by replacing it by an equivalent Thermo-Mechanical problem. Does anybody know how to accomplish this?

Do you have any suggestions? Are there any other ways to model piezoelectricity in ABAQUS / Explicit?

 

Modelling composite overwrap in abaqus

I'm working on repairing steel pipes with composite overwrap system and need to model it through ABAQUS.

can any one help me? I need to know how model the overwrap layer and the interface between it and steel pipe.

It would be great if some body help me.

Import geometry into Abaqus

Hi all,

             I would like to ask how is it possible to import  a sketch or a part into Abaqus without using any other software needed, like CATIA, PARASOLID etc... Currently I am using Matlab to create my geometry. What I obtain is my exact geometry in terms of points given by x,y and z coordinates in txt format or inp format. But still struggle to import my geometry into Abaqus. Any help, more than welcome...

Best regards,

              Panos

Manoj Krishna Majumder's picture

Simulation of single pass rolling through ABAQUS.

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bitamendi's picture

Water waves simulation with Abaqus

Hi everybody,

 

I want to simulate water waves using abaqus. I want design a good reef, in order to improve the waves to surf.

 

I'm Abaqus user (plasticity, elasticity, heat transfer...) but I never simulate water an less waves. Can someone help me or give me some indications to start???

 

 

Thanks a lot

Shabeer Khan's picture

Plastic strain data

Dear All

I am working on Abaqus simulation for thermo-visco-plasticity, especially on necking problem in circular bar.
I need the plastic strain data to add in the material properties table of Abaqus.
And, any help in this regard would be appreciated.

Thanks
Shabeer Khan
MSc Computational Mechanics

Shabeer Khan's picture

Internship in Computational Mechanics (plasticity)

Dear Members,

 Hope you will be fine. 

I am student in MSc Computational Mechanics, here in Nantes France. I am looking for an internship  which is compulsory part of master degree. I am interested in materials, processing/modeling and simulation. I would be grateful for your guidance and help.

 Thanks and Regards,

Shabeer khan 

Variable Elasticity (Young) Modulus

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I need to simulate a sheet forming but I must consider the variation of Young modulus with plastic strain.

Has anybody tried this? How can I implement a function for this? I have never worked with UMAT / VUMAT.

Thank you. 

mohanraj1987's picture

Abaqus/explicit

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

3. Assigning Sections

4. Defining Step

ABAQUS, Contact definition between soil and nail

Hi There,

I am  modelling a soil nail wall with ABAQUS. I am wondering to know what interaction I am supposed to define for connecting nail to wall and nail to soil? By the way, I define soil as 2D plane strain and wall and beam as beam element.

Regards, 

 

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