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SIMULIA's picture

New SIMULIA Tech Brief: Understanding the Effects of Nonlinear Preloads on Engine System Dynamic Response using Abaqus/Standard

What do
Guitar Strings Have to do With Dynamic Response?

Tightening
guitar strings to change the sound uses the same principle as tightening head
bolts to change the dynamic response of an engine block assembly. This is
stress stiffening and it affects the dynamic response of a structure. One of
the fundamental components in assessing nonlinear static stress is stress
stiffening, but it is also the most overlooked when evaluating the steady-state
dynamic response of engine assemblies.

ya2010ser's picture

Subsea impact simulation with Abaqus

Hi every body

My thesis is about ship grounding. In this phenomenon, ship hit a rock. I can simulate this problem in Abaqus/Standard,without wave effect. But in reality there is water and waves. Can I simulate this problem with ABAQUS? Is it possible to define water(or wave) aruond ship and rock?

 

SIMULIA's picture

New SIMULIA Tech Brief: Cogging Torque Analysis of Permanent Magnet Machines using Abaqus/Standard

When designing a permanent magnet machine, one of the most fundamental and difficult goals is to reduce the cogging torque curve. The challenge in reducing the cogging torque is to also decrease the numerical noise generated by the mesh. Finite element analyses and the advanced meshing functionality that is available through Abaqus/CAE allows for a faster and more accurate prototype.

rajnishmallick's picture

Dynamic buckling

I am working on a dynamic post-buckling problem.

I wonder if it is possible to simulate dynamic post-buckling of a column with pinned-pinned boundary conditions with an time varying (sinusoidal) axial load in Abaqus.

Thanks.

Good day.

Best Regards,

Rajnish

PATRAN boundary conditions

Hi, 

I would ask if someone could help me. I'm trying to aplly rotational boundary conditions on a cylinder in MSC.Patran, could someone advice me how to do it? Thanks a lot 

 

Peter 

how to extract the story mass and story displacement in Abaqus?

hello, everybody 

    I've made a 3D multi-story frame and shear-wall model in Abaqus. So far, I wanna get the equivalent story mass, story stiffness and story modal displacement. how to extract the story mass and story displacement in Abaqus?   or how to make an equivalent multi-mass point system from original 3D multi-story model? 

Thanks in advance 

How to plot Fracture toughness vs Crack length in Abaqus for Delamination problem

I've modelled a DCB specimen and applied Boundary conditions and load... I followed the same procedures given in abaqus documentation... As expected the crack initiates and propagates along the interface... I can get the Resultant force vs displacement plot from the analysis.. But i dont know how to plot the fracture toughness vs crack length plot in ABAQUS..

Please help me... Your suggestion would really help me a lot..

BoJing Zhu's picture

One 3DLBM example: plastic creep simulation

A simple 3D D3Q27 lattice Boltzmann example for simulate the plastic creep simulation on the friction surface 

B.C for 3D simply supported beam in ansys with SOLID95 element

Hi,

I am modeling a 3D simply supported beam in ansys using a SOLID95
element. In this case, how should I give
the B.C.s? Should I apply B.C.s to

1) the mid nodes on the edge of beam? or

2) to the entire edge? or

3)  just to the bottom nodes?

according to me, I have tried to use the various B.C case, but the
results are very different even though the nodes number taken in account
change slightly, and for all case, the result is not satisfactory with
my analytical solution. plz help.

 Thanks in avance!

lizheng619's picture

Abaqus single cpu and multiple cpus

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Dear all,

        I am running a abaqus job to simulate the failure mechanism of a pile-foundation system. The material used is mohr-coulomb soil. I found that if I use multiple cpus for the calculation, I got different results each time (at the step which does not converge). However, If I just use single cpu, there is no such kind of problem, each time I got the same results.

         Anyone else has this experiences before? I am quite confused.

 

 Zheng Li

Ansys divergence

Hello All,

I have a question regarding Ansys solution divergence in nonlinear static analysis, with geometry and material nonlinearities. In this case the model is shell but that should ba valid for bricks as well.

ABAQUS set a limit time for the esecution of a job

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hello,

 

as title says, does anyone knows how to fix a limit to the time that an abaqus job takes to be calculated.

 

this is because i am running several jobs sequentially, and i want to set that for instance if some job takes too much time, just stop it and go to the next one.

 

thank you a lot. 

ebarbero's picture

Abaqus UGENS/UMAT for composites damage

A discrete damage mechanics (DDM) model is now available as a UGENS/UMAT implementation for Abaqus/standard. This is an analytic constitutive model for laminates composites, based on discrete fracture mechanics. It is capable of predicting matrix crack initiation and crack density evolution using just two parameters--the critical energy release rates (ERR) in opening mode I and shear mode II. A methodology is available to determine those (invariant) material properties from experiments. 

hashin damage

hi.

Im modeling a composite with hashin damage.

but I dont know what to insert to the hashin damage

requirements .for example I dont know what to insert to the

 fiber tensile strength or   fiber compressive strength and so on. please help me

Mitral valve

I want to design a simple geometry of the mitral valve. But I do not know how to design. Can you help me?

LAMMPSFE---graphic postprocessing for LAMMPS

Just found a new sotware called LAMMPSFE, which has graphic interface and can generate lammps input script. 

https://www.scifes.com/index.php/product   

Abaqus Query

Hello,

 I am new to the FSI interaction module in abaqus, i wanted to know how to go for it, as i have modelled structure embedded in the soil domain using abaqus standard /explicit model and on which i have to model fluid striking the structure as well as the soil layer i have to use only Abaqus CFD model , iam not sure how could i model fluid in the CFD model what kind of interaction in between abaqus standard and abaqus cfd model and how could i make interaction, also how to install FSI module in abaqus cae?? it's knid of surge water striking structure!!

Thanks 

Applying constant strain as loading condition in Abaqus

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Hello All:

I am running a simple thermal tension coupon test with two steps.

Step 1: Apply a 10 lbs load on the coupon at certain temp.
Step 2: Keep the strain constant and reduce temp ( the material would
try to contract but I must keep the strain constant by increasing load)

Is there a way for me to do step 2 in abaqus and have it predict the load or stress required to maintain constant strain?

I would appreciate your comments? Thanks

Adina Vibrations

Hi,

I´m analizing the modes of a structure but I don´t know how to plot the different modes (I only see the first one). I´m using  Adina 8.7.3.

Thank you very much! 

Enquiry about modelling a cylinder filled with water in ABAQUS / CFD

Dear All

 My name is Paula , I am new user in CFD coupled with ABAQUS. I would like to know and understand how can I simulate cell wall filled with  of water. If the tank sloshing example good way to start with cfd/ABAQUS? .

The problem
is that the cytoplasm ( high % is water) has an internal pressure.
I
would like to make the simulation with outside presure ( hydrostatic pressure)
and find which is the outside pressure to brake the cell
wall and the cytoplasm gets free.

Beam-Shell contact in Abaqus

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Hello everybody.

 

I am doing my diploma project and I have to model an off-shore oil-rig in Abaqus. It's a metallic truss-type system. I've defined all of the elements composing the structure as wire elements and the decks as solids. Does anybody know how to define the contact between the decks and the supporting beams? The decks are supposed to be bolted to the beams.

 

 

Ahmad Yavari's picture

abaqus scrip

Hi 

I run a scrip in apaqus and do'nt need to see the graphical process in window of software and just the output data is essential for me!!

how i can do it ?? what thing i should add to my scrip for recive this idea?? 

mohammedlamine's picture

free-free vibrations v.s F.E. softwares

Hi All,

Do you know why some finite element softwares can not solve free-free vibrations of many applications unless you fix at least one degree of freedom ?

In this case I do not see how they are able to analyze free-free structures as planes.

 

Mohammed Lamine 

Finit element Analysis of mandible bone with implant

Hi everyone
i work on a bio mechanic project. i am going to simulate a mandible bone
with implant. at first i want to use Materialise Mimics V10 to convert Ct Scan
data of a mandible without implant to a 3D model. i thought i could edit
the exported file on the other software (Ansys or Abaqus) to add the
implant. but, exported file from mimics can not have any edit .Actually
it has not volume and i need to have a 3D solid model. please help me !

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