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Cyclic thermal load

I need to apply cyclic thermal load on a layered structure and want to see the stress generated and structural displacement using Ansys. How can I apply cyclic thermal load? iI tried to use Load Step Opts. Since I am interested only in stress-displacemnt, I used structural element. But if i use structural element, it doesn't give me Time/frequency option under load Step. Do i need to use coupled element? Is there any other way to apply cyclic thermal load to see stress-displacement? Thanks!

 

dabiao liu's picture

about critical thickness theory

who  can tell me more about the critical thickness theory ?I will be very excited if you   can introduce some reference to me.I know that critical thickness theory is solved rigorously and ursed to validated a useful approximation which is combined with slip distance theory modified for a finite structure size . (physical life review letters :elastic limit and strain hardening of thin wires in torsion)

Human conditioning

Instead of cooling a whole room some mechanism should be devised to cool only the human body thats only d requirement and can save energy its like mobile u can have it when u need.

Supplier and price details

I am unable to trace the suppliers of PEEK polymer in india. I am worried its price details too. Please help me out. sorry commercial agents.

Molecular statics

Is any one familiar with molecular statics.

3D Doctor Tool

Hi,

 

I hope this is the right forum to get some help for my work. 

I am looking at CT data (DICOM files) to make FEM models. To generate 3D surface/volumes for FEM, I was looking for softwares. They all are pretty expensive (4-10K USD). I have decide togo with Able Software's 3D-DOCTOR. I am lookign for some reviews or user experience or comments for this tool.

 

Thanks

Prab

FEM simulation on damage of brittle materials with Abaqus on mesoscale

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Hi, Smile

I'm a fresher in abaqus. Now I'm trying to simulate the damage of brittle kind of materials, like concrete with abaqus on mesoscale. But there are some problems now...

Shuozhi Xu's picture

The potential for Vanadium in molecular dynamic simulation

One of the most significant factors in molecular dynamic simulatin is to choose the proper potential. Recently, I did some searching jobs on Vanadium (V) potential and finally decided which potential I am going to use. Here is a simple summary:
A brief introduction of EAM, F-S and MEAM potentials for BCC transition metals

How to use small cracks theory to solve fatigue problems???

I  really need help with it .Anyone can help me . Thanks a lot . 

FEM simulation on damage of brittle materials with Abaqus on mesoscale

Hi, Smile

I'm a fresher in abaqus. Now I'm trying to simulate the damage of brittle kind of materials, like concrete with abaqus on mesoscale. But there are some problems now...

load deflection curve

the deep greeen one is the experimental curve

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Dynamic simulations with nonlinear material into Explicit

Hi all,

 I am new in the Forum, and I am looking for some informations regarding how to simulate nonlinear material in explicit.

I am tryng to analyse the behaviour of a roller rolling on the sand (or mud), but the results I get with a basic elasto-plastic material are not very accurate, expecially because I cannot set the tension allowed in the sand to be zero.

Other ways to input nonlinearity in Explicit are always refused by ABAQUS. Is there any way to get something more accurate?

WANGXU's picture

Some problems in the paper:" Haversian cortical bone model with many radial microcraks: An elastic analytic solution".

Dear all,

I have read the paper titled Haversian cortical bone model with many radial microcraks: An elastic analytic solution. My problems and the paper are attached.I hope you can see the problems and the corresponding paper. Thanks for your help.

Sincerely yours,

Xu Wang

whyakhan's picture

How to input displacement as a tabular function of frequency during harmonic analysis in Anys Workbench 12.0

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I am currently involved in performing dynamic analysis of particular
assemblies and working in ansys workbench 12.0. Currently I am stuck with a
problem, while performing harmonic analysis I need to input displacement as a
tabular function of frequency but inspite of all my efforts could not find a
solution to this problem. Also the assembly is connected to the vibrating base
via mounting feets. Now in that case should the displacement field be applied
to the holes of the mounting feet or the entire base plate of the assembly that

WANGXU's picture

Some problems in the paper---- Haversian cortical bone model with many radial microcraks: An elastic analytic solution.

Dear everyone,

Recently I have read the paper--Haversian cortical bone model with many radial microcraks: An elastic analytic solution. In this paper, I can't understand the dislocations Burgers vectors (bt and bn), the following words and the corresponding expressions(6a) and (6b). The paper is attached.   

ajitbabar's picture

analysis of composite barrel with load sharing steel liner

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i am doing structural analysis of composite barrel with load sharing steel liner from inside and IM7/PEEK composite sheathing outside. Can anyone guide me how to model composite sheathing material. i am using axisymmeteic model for analysis. loading is pressure from inner surface and temperature gradient across the thickness of cylinder.

 

                       thanks.

Tang Lihua's picture

bistable nonlinear energy harvester

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FSI Analysis of the Human Coughing Mechanism

We present an application of ADINA FSI in the study of the human coughing mechanism. The aim of the study is to help surgeons to position tracheal implants effectively. Please see

http://www.adina.com/newsgH69.shtml

You can find many other examples of applications of ADINA in the analysis of multiphysics problems here:

http://www.adina.com/multiphysics.shtml

Failure Theory Applications

A new section on applications has been added to the website on failure criteria.  Six examples of failure applications are given which span the range from very ductile to very brittle isotropic and homogeneous materials.  Summarizing two of the examples, first a very ductile polymer is examined wherein its tensile, compressive, and shear strengths are determined as influenced by a state of superimposed hydrostatic pressure. An interesting fallout from the example shows just how seriously in error the Mises criterion can be, even when applied to a ductile material.

 

XFEM modelling in ABAQUS

Hi

I am modelling the crack propagation in metals. I can do all the modelling but only adding the enrichment function in ABAQUS is an issue. I have defined the initial crack(for the CT speciemn), which starts at the node, but when I submitt the job it does not separate at that node. I think it because I did not define the enrichment functions.

I would  like to know how to add enrichment function in abaqus when modelling the crack propagation. Any suggestion would be appreciated.

 

Thanks in advance

Oscar

Johnson Cook damage criterion for Alloy 718

Hi I'm looking for a Johnson Cook damage criterion for Alloy 718 (or Iconel 718) i.e. the constants (D1,D2,D3,D4,D5).

If anyone seen an article or book with these constants I would be thankful if you could help me out.

Thanks in advance

BoJing Zhu's picture

A simple model for contact problem of different earth plate

A easy way to create contact FEM model by using NASA data and PB2002 data

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