User login

You are here

ABAQUS

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?

Thanks. 

characteristic Length

Hi

 

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

 

Outpu:

   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.

    Thanks

  

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 

ERROR in ABAQUS

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

Hi,

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: sufian.ulsan@gmail.com

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

Hi,

 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

 SUMMARY OF JOB INFORMATION:

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

Hi,
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. 

*AMPLITUDE, NAME=name
*SECTION CONTROLS, RAMP INITIAL STRESS=name

Details from INP file

*Membrane Section, controls = SC, elset=FABRIC, material=FABRIC
0.5,

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

ABAQUS> documentation > *.inp example files> Projectile impacting eroding plate

I have two questions about abaqus *.inp files.

first of all, as you may know, users are capable of running these type of example files through this way:

File> Import> Model...> SIMULIA>documentation>docs> v6.12> books> eif> *.inp

but when i run each of them (for instance Projectile impacting eroding plate: pl3d_erode_ccs.inp) , two important question marks above them will arised.

*MATRIX GENERATE - Global Stiffness matrix

Thank you  for your reply. I know but I was wondering if it is possible to omit them manually.

 One more question, I figured that using *MATRIX GENERATE, one could get the global stiffness, mass or load matrix in a ".mtx" file. But I am wondering why I can't get the file after the run.

https://www.sharcnet.ca/Software/Abaqus610/Documentation/docs/v6.10/book...

 Here is the keywords:

 

DOFs in Abaqus

Hi,

I got a simple 2D problem (a rectangular shell, static general, CPS4R element), with 557 nodes, each of them have 2 DOFs (U1 and U2), according to the data file. But when I print out the ELEMENT STIFFNESS MATRIX, for each element it is a 12x12 matrix which means the rotational DOF about z axis is also taken into account. How can I omit this 3rd DOF? Can I?

Thank you.

Temperatures updating in Abaqus (V)umat.

As we know, Abaqus/(v)umat provides the temperatures at each material point at the end of the increment, but in a thermo-mechanical problem, the heat induced by plastic deformation is unknown before the plastic strain is calculated. So, How the temperatures at material points in abaqus are updated?

Thanks in advance.

 

Y. T.

manz_0's picture

FLUID CAVITY HELP

I am modelling an inflated sphere. The sphere is composed off two circular planar membranes joined together at the boundries. 
I have modelled the inside of the sphere as a fluid cavity and will inflate it to its threshold limit. 

I have achieved this by using the fluid cavity and fluid inflator method but for some reason when I run my input file I receive the following message: 

SIMULIA's picture

Caterpillar, Tenaris, MAN Diesel & Turbo, and more - Check out the latest SIMULIA Community News!

The latest issue of SIMULIA Community News takes a look at how engineers in the industrial equipment industry are using realistic simulation solutions to optimize performance, evaluate designs, and further their understanding of the environments they work in. Additionally, see how Mazda balances performance and weight in a steel car body and NSE Composites validates their sweep-twist wind turbine blade design that captures 12% more energy.

Help in case of modelling PIezo In Abaqus (PLEASE!!)

Hi colleage

I am modelling a Piezo Beam 2D and 3D, i have no problem with 3D when i want to apply voltage load, But in 2D, when i apply load i Dont get any results in case of stress and strain Also when i apply pressure to beam, i Must get Voltage in Piezo but nothing happend, PLEASE HELP ME IN THIS CASE; THANKS ALOT 

fe-safe

I'm using Abaqus in analysis of random vibration fatigue. I linked abaqus with fe-safe to calculate the fatigue life. Fe-safe didn't recognize the random load comming from Abaqus correctly, althghou it already recognize the cyclic(normal) load crrectly in one of the tutorial's attached example.

Do any body know how to solve this issue? 

Pages

Subscribe to RSS - ABAQUS

Recent comments

More comments

Syndicate

Subscribe to Syndicate