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Question about postprocessing in ABAQUS

Hello,

 I am using Abaqus for a structural analysis problem. In the results I have stress distribution over the structure. I can use odb file to see the distribution of stresses as a function of space and time. 

I want to plot stress at a particular node as a function of time (and may be also stress distibution w.r.t. space coordinates at some instant of time). I have some general idea about the result file that can be generated from Abaqus and can be accessed. I am reading more about it but I am not sure if this is the right way.

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Fluid-Structure Interaction Analysis of a Flow Control Device

The Vernay VernaFlo® flow controls are custom-designed fluid flow management devices used in a wide range of applications and systems where consistent, reliable op-eration is essential. Elastomeric rubber components in these devices deform under the influence of upstream variations in fluid pressure. These deformations adjust the orifice diameter and help maintain a constant down-stream flow rate. In this Technology Brief the perform-ance of a custom VernaFlo® device is evaluated using the fully coupled fluid-structure interaction solution provided by the Abaqus co-simulation capability.

SIMULIA's picture

Fluid Structure Interaction Analysis with Abaqus and FLUENT

Engineering problems that involve the coupled response of a flowing fluid and a deforming structure constitute a broad class referred to as fluid-structure interaction (FSI). The interaction can be mechanical, thermal, or both. Many important problems involve some form of FSI, but the coupling effect is often ignored because of a lack of readily available solution technology. To address this limitation, Dassault Systèmes SIMULIA Corp. and Fluent, Inc. have partnered to provide a coupled solution capability.

Ductile damage modelling in ABAQUS

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Hi all

I am M.Sc. sutdent in Istanbul Technical University and my research subject is comparision of several ductile damage models both computationaly and experimentally.

I am trying to compare ductile damage models such as Freudenthal,Cockroft,Ayada ,Brozzo etc. computationally using ABAQUS and seeking a way to implement these damage models in ABAQUS.

To obtain each models damage result individually should damage model be implemented in ABAQUS or can a regular tensile test results be used for calculation of damage values.

What's that Car Noise? New SIMULIA Tech Brief Available: NVH Analysis with Rolling Tires

The sources of noise in a vehicle are many, including the engine, driveline, tire contact patch and road surface, brakes, and wind to name a few.  A Noise, Vibration, and Harshness (NVH) engineer is tasked with predicting these noises early in the design phase to make the necessary adjustments to ensure a harmonic ride, so to speak. The latest SIMULIA Tech Brief illustrates the effects that rolling tires have in contributing to NVH.

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SIMULIA Regional User Meetings featuring Abaqus and more

To learn more about the new features of Abaqus and Isight, and interact with your colleagues, be sure to attend one of the 20+SIMULIA Regional User Meetings (RUMs) coming up. There are 7 meeting locations in the US, 5 in Asia, and 9 in Europe.

Check out the worldwide schedule here:  http://www.simulia.com/events/rums.html

Abaqus: How to lower the stiffness linear curve of load vs deflection of concrete slab

Dear all,

Iam modelling a simply supported RC slab with Abaqus using Concrete Damaged Plasticity subjected to a concentrated load at the top surface of the slab. I have used element type C3D8R for concrete and truss elements to represent steel bars.

 

I found the result of FEM showed that the linear part of load versus deflection, i.e. from zero load up to yield load shows a very stiff curve compare to the experimental test results.

 

My question is that how to lower down this curve so that it would match the experimental test result.

tedvaughan's picture

Fluid structure interaction with Abaqus

Hi,

 

I'm looking for tutorials or example problems on carrying out Fluid Structure Interaction simulations using Abaqus.  

I have a large amount of experience with Abaqus Standard however Abaqus CFD is very new to me.  Would anyone have the training course notes on either "introduction to "ABAQUS/CFD" or "FSI Simulation with Abaqus"? If so, I'd really appreciate a copy.

 

Thanks

Ted 

Methodology of simulation post-processing for metal parts in Abaqus

I mesh most of my parts in C3D8R. My simulation are quasi-static, and involve a lot of contacts. To model steel, I use a classic elastic-plastic behavior, coming from stress-strain curves we measured. I have the yield strength of the material and the strain at break. My questions concern post-processing.

energy balance of surface-based cohesive of composite under impact in Absqus 6-10

Hi there! I am really new to Abaqus and I need to model a composite
laminated crash cone under impact to a flat solid wall (analytical
surface is used). I modelled a cone with a layers of conventional shell
elements with hashin failure criteria and surface-based cohesive
behaviour as interaction between layers representing the interface of
composite laminates. The model runs successfully but once I checked the
energy balance, the damage dissipation energy from the cohesive, it
turned out to be NEGATIVE (I think this is wrong).

ABAQUS load/surface coupling. User element loads – VUEL and VDLOAD

Hi,

I am attempting to couple a moving multi-body load to a surface using ABAQUS/explicit, i.e. the loading varies depending on the surface displacement at the previous time step.

I realise that VDLOAD cannot access values such as element displacement directly but can access variables using tools such as utility subroutines e.g. UEXTERNALDB.  The only problem is that such utility routines only seem to work for ABAQUS implicit.

Similarly vgetvrm can be used to output stress values but not displacement.

An Introduction to ATOM: Nonlinear Structural Optimization for Improved, Rapid Product Design (FREE WEBINAR)

Register for this FREE webinar to learn how the Abaqus Topology Optimization Module (ATOM), from Dassault Systemes SIMULIA, delivers advanced capabilities for nonlinear structural optimization and provides important benefits to engineers and product designers by identifying the optimized topology and shape of a structure.

For more information, visit: http://bit.ly/j6JZdn, or www.simulia.com -> events -> webinars.

Linking ABAQUS With Subroutine Written In FORTRAN 90

Hi,
         I am using ABAQUS 6.10.1, Microsoft Visual Studio 2008, and Intel Visual Fortran Compiler Professional 11.1.060 on Windows 7 Premium. So far ABAQUS of my system is able to process user subroutine written in FORTRAN 77 (.for file) without any problem. However, may I know is it possible to make ABAQUS process user subroutine written in FORTRAN 90? Waht setting should I change and what format ( .for or .f90 ) should the FORTRAN 90 user subroutine be saved in order for the linking to work?

Crack modelling in Abaqus with prescribed displacement problem

Hi,

 I am modelling stationary Mode-I & Mode-II crack in a simple 2D plate on abaqus. My problem is a prescribed displacement problem i.e. I have to apply displacement boundary condition on the edges of a plate instead of tractions. I am a begginer on abaqus and need help in this regard. Moreover, I'll appreciate if anyone could give me some instructions or tutorials on analysing stationary cracks with both FEM and X-FEM.

 

Regards

/Wasim 

Force integration from CPRESS is not equal to the Normal Load

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Dear All,

I am running an axisymmetric model of a parabola tip on rigid surface contact under external load controlled by CLOAD. However, the CPRESS value outputed integraded over the annular areadoesnot equal to theexternal load inputed. The reaction force from the system does though.

I am suspecting that there is shaer component in the numbers given by CPRESS, but CSHEAR are all zero. Could anyone give me a hint on this problem.

 

Thanks a lot,

 

Jingjing

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

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