Dear friends, i current doing a project work on testing fatigue life of superelastic nitinol. And since i am very new in using abaqus for testing the simulation, i seeking help from people around here to ask for method to test the work. My objective is to set a maximum elongation for 1%-6% of elongation and test for 40,000 cycle if it can work for this amount of cycle..

i Hope anyone can help me as i need to finish this project in order to graduate and i didnt get any single help from regarding this software from my side..

I am trying to model and centre crack inclined at 45 deg angle under uniaxial compression under mixed mode I and II. I am using Abaqus 6.12SE but I'm stuck with Damage Evolution parametres: I chose Damage for Traction Separation Laws, Maxps; Damage Evolution Type = Energy; Mixed bode behaviour = Power Law with power value 1; Now at the bottom what should be the input values of Normal Mode Fracture Energy, Shear Mode Fracture Energy 1st direction and Shear Mode Fracture Energy 2nd Direction. I need help asap. Thanks all.

Hello guys,

I am working on a project wherein there is a rubber material which gets compressed. Now I have the force-displacement curve for this rubber material. I intend to represent the rubber with NL springs.

The F-d curve mentiones the specimen details as 5*100mm. This i beleive is the tested specimen. Now how can I consider this for the whole rubber model???

I have n number of springs connected in parallel. How can I consider this when I use a F-d curve?

Any help is appreciated.

Thanks. 

I have written a National Academy of Sciences biographical memoir of Zay Jeffries, one of the great American metallurgists of the 20th century.  I am posting the link to the NAS website here with the thought that some readers of iMechanica might be interested in the piece.  Some will be interested to learn that Jeffries came very close to discovering dislocations some 18 years before the great papers of Taylor, Orowan and Polyanyi in 1934.

http://www.nasonline.org/publications/biographical-memoirs/memoir-pdfs/j...

W.D. Nix 

Important Questions on  

Applied Thermodynamics EME-401 for GBTU

Hey all, 

How can post buckling analysis be carried out in ANSYS, when element Shell181 is used? what are the various methods and the procedure how to carry out the analysis ???

Can i say, the center of buoyancy and the center of gravity of the immersed part are same?

Hello All!!!

 I am Arun, Master degree student in South Korea.

 My research field is : High strain rate experiemnts

 I did High speed tensile test for aluminium alloy at four different speeds (1m/s, 5m/s, 10m/s and 15m/s)

 I also did high temp tensile test for aluminium alloy at room temperature, 100 C, 250C

 Now i have the stress Vs Strain curve for High speed tensile test and high temperature test

 But, i don't know how to determine Johnson-Cook model parameter from the experimental results

 I read many reference, but it's confusing

 Can some one guide me to determine the parameters

Thanks and regards,

Arun

How to include water buoyancies effect in analysis for an abaqus model. The abaqus model is developed using shell and solid elements

At Elsevier, we are committed to supporting authors and reviewers. We have developed several series of freely-available, bite-sized training webcasts containing some useful tips and tricks on a range of valuable topics.

http://www.elsevier.com/authors/publishing-connect-training-webcasts

I'm trying  to simulate  with ABAQUS a explosion of TNT and the effect of that on a metal panel. The metal panel is 200mm away from explosive. It is about 100g TNT. I now about the subroutine VDLOAD. Which options I could use else in ABAQUS? Is it posible to define a explosion lake this with *EOS? If yes, which element type I should use for explosive set? Should I define a element set for air, if I use *EOS?

How to input stress strain details into ansys in materila modelling?

I have the stress strain points in a excel format table....and also in graph..

How to find J integral using ansys of a CT specimen?

Both for 2D and 3D

please help me to solve mechanical engineering design problem of rolling contact bearing with matlab. thank u so much.

simulation of Turning of particulate reinforcement in abaqussimulation of Turning of particulate reinforcement in abaqus

Dear Gropu member,

 I am josyula, working on machinability study of composites on abaqus .

1) i need help in modeling of particulate reinforce composite.

2) i need help in simulation of turning  in abaqus.

 if an body know anything about modeling and simulation reply me  or guide me properly to achive  out put.

 thank 

josyula 

Dear Friends,

New textbook includes an explanation of the concepts involved in the detailed analysis of composites, a sound explanation of the mechanics needed to translate those concepts into a mathematical representation of the physical reality, and a detailed explanation of the solution of the resulting boundary value problems by using commercial Finite Element Analysis software such as Abaqus. Included are more than fifty fully developed examples interspersed with the theory, as well as more than seventy-five exercises at the end of chapters, and more than fifty separate pieces of Abaqus "pseudocode" (a novel idea for the first time introduced in this textbook).

Using Abaqus, hanging some mass in Truss element (T3D2), facing numerical singularities and lack of convergence due to Truss elements have no initial stiffness to resist loading perpendicular to their axis. If a stress-free line of trusses is loaded perpendicular to its axis in Abaqus/Standard. Kindly suggest me how to overcome this. 

Hi,

i'm in an internship, and i want to study the stress destribtuion with photoelasticity method, but my problem is that the material that i have is not homogenious but there ares two layers. I can do the measurement for the two material separated, but i dont know how to do that for my layared material.

 anyone have an idea about how to do photoelasticity measurement for multilayere materials ?

Thanks.

Hi,

I am new here and have a very basic question on the Strain Energy Density (SED) function of exponential model.

 This is the exponential model SED form : W=a(e(b(I1-3))-1)

Now we have certain postulates such as that

1.W=0 when there is no deformation and

2. stress=0 when strain =0.

 When there is no deformation I1=3 and hence W=0, which is correct.

However, when we take the 1st derivative of W with respect to I1 to get our stress and then substitute I1=3 we don't get stress=0.

 I know this is a standard model used very often, so I am obviously wrong in my understanding of how the 2nd postulate works for SED functions.

hi

I want to determine the number of cycles required to propagate a crack upto certain dimentions or vice-versa?

Does ansys APDL has that capability to do fatigue analysis of a growing crack.

my problem is analysis of elliptical corner crack present at shell nozle juntion. 

if yes,please tell what is to be done in ansys  13.0 APDL for this?

thanks and regards

swapnil 

Hello,

I try to simulate diffusion between two solid plates under the action of temperature with ANSYS. They fixed in both side.

But I do not have an idea how to do it.

 http://www.ornl.gov/sci/physical_sciences_directorate/mst/ASM_Symposium2013/index.shtml

 The Oak Ridge Chapter of ASM International, in partnership with Oak Ridge National Laboratory is proud to organize ASM Educational Symposium: "Developments and Trends in Additive Manufacturing," April 18, 2013, National Transportation Research Center, 2360 Cherahala Boulevard, Knoxville, TN.