research

question about abaqus

Hi guys

I want to simulate a problem with abaqus,but during runing of my project,percent of process not increas for axample when i change mesh sizes to biger runing go up to 50 % and when i change mesh sizes to smaller than the previos size,it occure again but in 25%

is there any one that know about this problem,i'm trying to solve it for 2weeks but i cann't.

I'm waiting for your suggestions...


FATIGUE CRACK PROPAGATION-- ITS IMPORTANT

FATIGUE CRACK PROPAGATION-- ITS IMPORTANT

FATIGUE CRACK PROPAGATION-- ITS IMPORTANT

FATIGUE CRACK PROPAGATION-- ITS IMPORTANTFATIGUE CRACK PROPAGATION-- ITS IMPORTANT

 

Hello,    

          Currently , I am working on the fatigue crack propagation in ANSYS 12.1. Can anybody help me regarding how to get the next cracktip position?
Currently, I am referring to the paper named, “Mixed mode fracture analysis of aluminium repaired panels using composite patches” , Authors : Hossein Hosseini-Toudeshky, Bijan Mohammadi, Hamid Reza Daghayani.


FATIGUE CRACK PROPAGATION-- ITS IMPORTANT

FATIGUE CRACK PROPAGATION-- ITS IMPORTANT

Hello,

       Currently , I am working on the fatigue crack propagation in ANSYS 12.1. Can anybody help me regarding how to get the next cracktip position?

Currently, I am referring to the paper named, “Mixed mode fracture analysis of aluminium repaired panels using composite patches” , Authors : Hossein Hosseini-Toudeshky, Bijan Mohammadi, Hamid Reza Daghayani.

According to this paper, I am using following two equations for calculating the incremental angle of crack propagation (α) :

Refer images.

 


questions about abaqus software package

Hello

I was analyzing pavement subjected to traffic wheel load. I was using the load as cyclic pressure. Suppose an amount of pressure with 200 different time frame. But I am not getting the right result as measured. So, would you please help on applying moving load? How can I assigned that load as moving load? where can I find the step load function? how can I determine the initial increment? is it more realistic to simulate the wheel load as dynamic? how can I do that?


cantilever column

hello all,

i modeled a cantilever column with eccentric loading to simulate half of ordinary column, i get a small displacement at cantilever tip (equals 1/3 of reality,) so i want ahelp a bout updating geometry during analysis in order to getting effect of second order/nonlinear effects due to eccentric load.my software is ANSYS

thanks for all,

for contacting or sending any information my e-mail address:hany_well70@hotmail.com

best wishes.

hany ghazalah


Mikael Öhman's picture

Constructing the extension velocity or updating the signed distance of a level set

Dear all,
I had been looking forward to use level sets to keep track of the surface in a simulation, but one thing has me stumped. Since many here work with XFEM, I was hoping someone might have some valuable input.

I want to simulate flows driven by a surface tension. This will typically yield holes, which will close rapidly. At the point at which the hole disappears, the signed distance function will have a discontinuity.
I would expect this to happen in pretty much any fluid simulation, but I can't see any way to handle it.


M.Hassan Mansouri's picture

boundary condition in plate analysis

Dear All

 I have a problem with some theories in plate analysis such as bending and buckling of plates.

 you know that in various theories of plates, equations have different order and different number of boundary condiotions must be apply. for example in classisal theory of plates we have 4 B.C.,  and in first order shear deformation theory the number of B.C. are 5.

I am confused, how should I recognize the number of required B.C. in each theory?

 

Regards

Mansouri


analysis for large deflection

hello all,

i modeled a cantilever column with eccentric loading to simulate half of ordinary column, i get a small displacement at cantilever tip (equals 1/3 of reality,) so i want ahelp a bout updating geometry during analysis in order to getting effect of second order/nonlinear effects due to eccentric load.

thanks for all,

for contacting or sending any information my e-mail address:hany_well70@hotmail.com

best wishes.

hany ghazalah


PrinceUS's picture

A new ABAQUS user needs some guideline

I am doing research in Bio mechanics field. I need to
get some urgent ABAQUS/Explicit result from my generated knee model
from MRI information. I am very very new user of ABAQUS. I need your kind
help.  In light of this connection, I am attaching one file regarding
to my quarries . if you kindly guide me for some few steps, I
will continue then on and it would be highly appreciable.

 I tried to post anot one input file. But I cannot do that hereby. If any one wants me to help me out , I will send that via your personal email.

 

 

Arif


contact problem help in ABAQUS

i am new to Abaqus and i am unsing Abaqus 6.10

i planned to solve a contact problem by taking a bearing for example problem. i modelled the bearing section in pro-e and inmported it to Abaqus.

*i gave the material properties of steel for both ball and races

* in interferance i defined ball as master and the surfaces in the reces in the bearing as slave. frictionless.

* i gave pressure on the top race and arresteed the bottom race.

* the sides were given symentric with respect to y axis.

when solved i get the job is aborted.

the error i get is

=>displacement increment is too large.

=>the increment value is too low


mahmood seraji's picture

Help in ABAQUS

Hi

I am using Abaqus to model the profiled steel sheet and the dry board will be attached to it. i have two question:

1) i have drawn the profiled sketch and have to extrude it to the proper length. if i do so, then how can i add some points in between the sheet in order to put some springs.

2) if i extrude the created sketch to the certain length (ex. 200mm), can i then copy the created model and paste it there to reach the desirable length for the sheet.

thank you.


i want help to get cracks and strains in r.c columns

Hello all,I am an M.S student, my subject in modelling of high strength concrete column under eecentric loading.


Elastic Deformations & Lie Groups/Algebras

I'm interested in representing elastic deformation in terms of Lie groups/algebras. Is anyone working on this area ? I think it's easiest to start (end !) with homogeneous deformations. Thanks, John.


help about secnd order effect in columns

ello all,

I am an M.S student, my subject in modelling of high strength concrete column under eecentric loading. I made a model of reinforced

 concrete column with in ANSYS by solid65 to represent concrete and link8 for steel.

My model is 200*200*4000 mm, i choose multi., conc.,and elastic linear for concrete, closing crushing for it, for steel bilinear, elastic.

Slenderness ratio (l/d)=20 Although Using large displacement analysis option, model give me very small displacement (less than


Heip to get second order effect in reinforced concrete column

Hello all,


tlaverne's picture

Solving Efficiently Neumann Problems

I would like to know simply how to solve efficiently elasticity problems with Neumann boundary conditions? Neumann bc implies that I have 6 null eigenvalues in 3D (3 in 2D) associated to rigid body modes  and iterative methods such has conjugate gradient are not likely to work (because the problem is no longer positive definite, but only semi-definite). Is there any way to use iterative solver anyway by filtering rigid body motions or something like that ? However has anyone a good idea to solve such problem? For now, fixing aribrarily the displacement of some nodes (3 in 3D but not aligned, 2in 2D) is the only way I see, but I would like to have your smart advise on the subject...

Thank you !


Interfcing Abaqus with Matlab

Hello everyone,

Can anyody tell me  the detail for the interfacing of input files(.rpt)  such for  displacement, Moment  in Abaqus to be parameterized by the optimization algorithm in Matlab. I have used the exclamatory mark for editting all files in matlab directory......


shubham kanungo's picture

Acoustic refrigeration in Mobile phones

 I think having Multi Function and multi tasking Mobile Phones r having problem of call drop as compared to other phones having less features the reason being as heat flows from High temperature(Mobile) to low temp(atmosphere) , Infrared radiation creates a barrier to the signal wave and such problem can be rectify by mobile cooling may be done Acoustically.


KennyNg's picture

Transverse moduli for composite

I'm currently working on modeling 3 phases composites material. However, I'm having hard time on finding the transverse modulus as it's different from analytical results. I've been using Mori-Tanaka approach to determine the stiffness moduli. Does anyone know how to obtain a correct values for the transverse moduli? 


Modelling 2D instead of 3D in ABAQUS

Hi,

I modeled a beam with a hole in ABAQUS in 2D and now I would like to stick one plate to the beam surface.

I can do it easily in 3D but actually I do not like to jump 3D because It will make analyses very hard to follow.

My question is that, Is there anyway to stick a the plate to beam in 2D in ABAQUS and avoid 3D?

Thank you,

Parisa


Enquiry for research in EDM

I karunanidhi working for a engineering college in india.. i m very much interested to do my phD in electrical discharge machine but i didnt get the source please suggest me where to do??with scholarship...


surajmravindran's picture

Bimaterial interface modelling using ABAQUS

Hii all,

How can we model a bi-material interface using abaqus. 


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