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frequency responce- how to track natural frequency of the beam using Abaqus?

frequency responce- how to track natural frequency of the beam using Abaqus? may i have the example of doing that? and the details that need to be considered.

Thanks.

Modeling heat transfer involving a phase change (ice to water) using Abaqus

I'm modeling the transient heat transfer of a cooler with an ice pack in it. How does one accurately model the phase change of the water? Here's what I've tried so far:

 1. Added latent heat property to material card. Used Latent heat = 334 kJ/kg, Solidus Temp = 0, Liquidus Temp = 0

   Result: Error, Solidus and Liquidus temps cannot be equal

 2. Solidus temp = -0.01, Liquidus temp = 0.01

   Result: Analysis ran, but diverged very early in the analysis.

Help with movement representation in Abaqus

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Dear sirs,

I would like to seek your assistanceon using the Abaqus software  .

I am trying to study the stresses inpavement layers , by applying  movingloads caused by vehicles. However I have not been able to get a visualrepresentation of the moving load.

I would like to know how to get acycle of movement , to and fro ...over a period of years .

ABAQUS and Constitutive equation

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Dear all,

 I'm new to ABAQUS and I was wondering if we could have access to any constitutive equation in ABAQUS and add another stress tensor to the Cauchy stress tensor?

 regards, 

-- Hamid Attaran 

LOW-CYCLE FATIGUE CRACK PROPAGATION IN ABAQUS USING XFEM

 

Hi all,

 I´m traying to simulate a low-cycle fatigue crack growth in Abaqus 6.9 using xfem. My problem is to add the low cycle method to the xfem solution. 

I believe that the only current option for this would be to manually
create the loading curve and to do the analysis by a brute force
method but i may not be correct in this assumption however.

Please could someone explain a brief method.

i appreciate in advance.

 

 

Cohesive material zone model and ABAQUS subroutines

Hello,

I'd like to ask if anybody knows if it is possible to use an ABAQUS usersubroutine that could vary some parameters (τmax, kn or ks etc) of the cohesive zone model of ABAQUS with the vertical pressure applied on the interface. The new ability of ABAQUS to support cohesive behaviour in contact surfaces seems very interesting and useful, however how could somebody simulate the interface under a compression - shear regime that may follow a Mohr-Coulomb type behaviour?

Damage modeling in ABAQUS 6.9 in surface based cohesive behavior

I am working on shear failure of sandwich composites.I have modelled a sandwich composite with surface based cohesive behavior in ABAQUS 6.9.Now i have to do damage modelling.

Modeling grain boundaries using FEM (Abaqus)

Hi,

I would like to model a microstructure using Abaqus. My question is how to deal with the grain boundaries ? Should I use cohesive elements ? Any ideas on modeling grain boundaries using FEM will be very helpfull.

Thanks,

Ayoub

Frank Richter's picture

Section points in user elements

 

Dear Group,

does anyone know how section points can be defined in user-defined elements UEL ?

I am trying to program my own beam element in ABAQUS. The beam element library does not provide a beam element with temperature as a degree of freedom which would come as an asset in our application.

Beam elements feature so-called section that provide the spatial resolution through the thickness. I cannot find any clue how this can be programmed. ABAQUS standard elements give results for strain, stress and the like at these section points.

A question on UMAT implementation of non-local theory

 

Hi, friends,

Now, I am implementing the non-local continuum theory in ABAQUS through UMAT programming.

Unfortunately, I have been obstacled by the following question:

On one hand, in non-local continuum theory, the non-local strain of every particular integration point is determined by the global strain field all over the specimen.

jason Zhu's picture

How to represent a "bird" in ABAQUS

Dear all,

   I will model a bird to impact a shell at high velocity by ABAQUS.  I decide to model the "bird" by ALE mesh and referred by EOS equation.

   However, most simulation works are done by LS-Dyna. Do anyone know how to determine the parameters in ABAQUS for the "bird" in EOS equation?

   All suggestions are welcome.

   Thanks.

 

Jason,

Best regards 

Shape memory alloy material models including plasticity implemented in ABAQUS

I am working with shape memory alloys (nitinol), and am in that respect investigating fracture behaviour of NiTi, using, among other things, simulations in ABAQUS. ABAQUS doesn't have a material model that include plasticity unless you pay for it. I am wondering if anyone have implemented either of the following models as a UMAT, and if you are willing to share the code with me.


The models I am interested in are:

Effective strain rate and strain rate in ABAQUS subrotine

Hi there,

would you please tell me how can I use or calculate the effective strain rate or strain rate in ABAQUS subrotine?

 thank you!

phamhuytuan's picture

Frequency response analysis for solid-liquid system with ABAQUS

  diaphragm by you.

Hello ABAQUS users!

 Do you know how to simulate the resonant frequency for a diaphragm with a liquid medium below as in the figure with ABAQUS ?

Venkat Bharath's picture

Help in abaqus modelling

Hi all,

 I am currently working on my Masters thesis which is the analysis of sandwich structures subjected to blast loading using Abaqus. Can someone suggest some references which would  explain me how to apply blast loading using abaqus. 

There is an example problem of submarine in the abaqus user's manual which includes the blast loading. But they've only given the inp file for that. 

 

So can someone also tell me how to generate .cae file from .inp file in abaqus.

 

Best Regards,

Delaminated Composite Plate

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 Hi,

 I am researching delaminated composite plates.

 How can i model the delamination area in two plies, is abaqus a correct choice for modelling?

 Delamination area is rectangular or circular.

 Regards.

 

Modeling Short-Beam Shear in Abaqus

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Hi All, 

Frictional Coulomb model in Abaqus

Hello everybody,

I'm trying to add friction in my model.Now I have a body that is simply supported in a direction (vertical) and free to move in another one (horizontal). I want to use Coulomb friction in the horizontal direction in order to reduce displacements in that direction.

I read Abaqus User's Manual vol5 30.1.5 (frictional behavior) and I followed commands written there, but I think that works only with multiple bodies and not with a single body. I'm using Abaqus 6.7-1.

Could Someone help me?

Many many many thanks

Nicholas

kisku's picture

abaqus

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dear all,

i wanted some codes used in ABAQUS to solve the dynamic problems:

1.Blunt and Hemispherical projectiles hitting the plates.

2.When the plate is perforated by the high velocity projectiles.

hope someone will help me.

regards,

-Sanjay

Question in sequentially coupled thermal stress analysis using ABAQUS

I was wondering if anyone has solved a “sequentially coupled thermal stress analysis” problem using ABAQUS?

If so, here is what I am looking to solve.

Let’s assume we solved for the temperature (T) as a function of time and space using the transient heat transfer analysis given certain BCs.

Abaqus: How can I fix the center of a gear? - Please Help!!

Hi,

I´m trying to simulate the contact between two gears. Each gear has 60 triangular tooth and all of them are in contact at the same time. 
I have one external gear and one internal gear. The internal gear is driven by a torque applied at it center. 
I know that I should fix the center of the gear but I don´t know how to do it with Abaqus. Ive started to use two weeks ago.`I´ve already done the tutorials and reading the Manual!.

Please Help me!!
 

Best wishes

 
Ezequiel

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