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Finite element method

Dear all,

               I have a great intrest towards structures static analysis but the thing is i dont know FEM.I want to learn FEM from basics.it will be very help full for me if any body can suggest a book or provide me wid some softdata.please send me link or attachment to maruthir@infotechsw.com.

Thanking u,

Ravichand

regarding orthognal machining chip propagation usng abaqus

hi am doing my project on high speed machining of aluminium and steel. for chip propagation i want some procedure how to do crack/fracture analysis using ABAQUS. if anybody knew about this please send me information regarding steps involved in building crack propagation.if any practile examples or tutorials are available for this send me to my mail id. my mail id is sasivamsi@gmail.com. am using ABAQUS V6.6.

How to Approach this dynamics problem?

I'm stuck with this problem! I can't figure out how to start. Can some
one give me a guideline or tell me from which book this problem is??
I'm not good at mechanics(especially in dynamics). I always struggle in mechanics. Any solution to that! Frown

thermal analysis of fin on ansys

salam to every one......

I am doing B.E mechanical and my final year project is related to thermal analysis of fin i have completed my first step that is first law analysis of thermodynamics. And i have achieve temperature profile on fin model.

Now i am stuck at second step that is ENTOPY AND EXERGY ANALYSIS(i.e second law of thermodynamics) ihad seached enough but ther is no feature like this. i am using follwing equation for calculatig entropy calculation

Entropy balance at node N

Sia Nemat-Nasser's picture

On the nature of the Cauchy stress tensor

Checking the iMechanica web, I notice some discussion about the Cauchy stress tensor, whether it is covariant or contravariant.  Well, a tensor is neither covariant nor contravariant, while it can be expressed by its covariant, contravariant, or mixed *components* with respect to any arbitrary coordinate system. See the attached short explanation.

Transient Thermal Stresses

Dear All

I am studying on thermal stresses analysis, however I have a problem here and need helps.

Shell 99 on Ansys

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Hello.

 I'm attempting to model a thin composite laminate plate in ansys and
after searching this website and using the ansys help, I have chosen to
use shell 99. However when I load up the Ansys 8.0 software on the
university computers (I am a student), I can not seem to find the Shell
99 choice, or in fact any of the other possibilites, such as shell 91,
shell181, solid 46, or solid 191.

 Just wondering if anyone would know why this is the case, I'm
hoping that it;'s not because it's a university edition or something.

 

Shell 99 in Ansys

Hello.

 I'm attempting to model a thin composite laminate plate in ansys and after searching this website and using the ansys help, I have chosen to use shell 99. However when I load up the Ansys 8.0 software on the university computers (I am a student), I can not seem to find the Shell 99 choice, or in fact any of the other possibilites, such as shell 91, shell181, solid 46, or solid 191.

 Just wondering if anyone would know why this is the case, I'm hoping that it;'s not because it's a university edition or something.

 

Cheers for the help. 

force on dislocations

Hi, how the Peach-Koelher force acts on a dislocation?, I understand when the resolved shear stress acts on a dislocation. But not quite the term that provokes  climb on an edge dislocation...

Mechanical impedance for a cantilever euler beam

HI

I have a cantilever Euler beam with a force.

I want to find mechanical impedance for this system

Can you hel me for Specify this impedance?

I attach a jpg file that it show my system. 

regards 

How to do node separation in ABAQUS by giving shear failure

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hello..

 i am working in abaqus for chip formation in machining by using shear failure..please help me how to proceed

How to node separation in ABAQUS by giving shear failure

hello..

 i am working in abaqus for chip formation in machining by using shear failure..please help me how to proceed

Neo Hookean Model

I am modeling a RBC(red blood cell) membrane using shell181 element and
using neo hookean model. But when I try to solve it, it gives error. I
couldnt figure out the cause. Please help me.
This is my input file for creating the model.
/com,structural,,,
/clear,start,,,
/prep7,,,,
k,1,0,0,0.000000405
k,201,0,0,-0.000000405
k,2,0,0.00000005,4.06E-07
k,202,0,0.00000005,-4.06E-07
k,3,0,0.0000001,4.07E-07
k,203,0,0.0000001,-4.07E-07
k,4,0,0.00000015,4.10E-07
k,204,0,0.00000015,-4.10E-07
k,5,0,0.0000002,4.15E-07
k,205,0,0.0000002,-4.15E-07
k,6,0,0.00000025,4.20E-07
k,206,0,0.00000025,-4.20E-07
k,7,0,0.0000003,4.27E-07
k,207,0,0.0000003,-4.27E-07
k,8,0,0.00000035,4.34E-07
k,208,0,0.00000035,-4.34E-07
k,9,0,0.0000004,4.43E-07
k,209,0,0.0000004,-4.43E-07

triangular load on an area

Hello,

 

I try to enter a triangular load on an area. I have entrered the gradient information in settings. But when I try to apply load on area, it does not take it in triangular form, but in constant form. It works  with apply on nodes. But, is the result correct with this option?

Deflections for continuous beams

 

  hi all,

     how  the deflection of continuous beams are evaluated by using Rayleigh-Ritz method?

Huapei Wan's picture

Pressure on circular area of a semi-infinite plane: typos in textbooks "contact mechanics" "surface mechanics" "elasticity"

This is supposed to be a very classic analytical solution in applied elasticity. Forgive me if this is a repost or some correction has been made before. I had a hard time with it.

Problem statement:  uniform pressure is applied on cirular area (radius=r) on top of a semi-infinite plane. Find the vertical deflection.

We got discrepancy between FEA solution and analytical solution which I found from different textbooks (famous and non-famous): Deflection within the circle is good, however, no good outside the circle.

We found the correct solution is attached.

ANSYS shell99

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Does anyone knows what's the theory of the element shell99 in Ansys? I tried to search in ANSYS Help, but didn't find anything. Is it kirchoff classical plates theory?

Pond design

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. I want to design a detention pond, where should I start? The flow into pond is 1.4m3/s, the existing SW system near the pond is 600 dia pipe. If I calculate the disharge through the pipe using Mannings formula, the max capacity is 1.8m3/s, using the orifice formula for 600 dia pipe it is only 0.5m3/s. So which one should I use? Because if it is orifice one I will need to allow for 3m head water

abaqus cae

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Hi guys..i am an abaqus CAE user and i am creating a model of an annular disc with a clamped at the middle hole. I have to compare the result of the stationary one with the rotating one. But I did not know the command for a rotating disc, as I have tried, I used the rotational body force. The problem is the result is the same as the stationary one which is wrong! i am a beginner at this, so could somebody help me out here, please?

shazwang

Solids Textbooks

      The texts from Timoshenko and Landau and Lifschitz are classics. I think learning the physical approach of L&L is particularly valuable. The following sections are available in L&L:

 1. Fundamental Equations

 2. Equilibrium of Rods and Plates

3. Elastic Waves

4. Thermal Conduction and Viscosity in Solids

Look for insightful physical explanations, and expect to read with a pen and paper at your side, to understand exactly the brilliance behind each statement made.

Indentation test modelling on Ansys

I am currently doing simulation on Ansys regarding the indentation test for viscoelastic material. I have some problem with the contact element.. Can someone help me on?

Crack tip stress and formation of Plastic/influence zone for composite solid rocket propellant

Crack tip stress and formation of Plastic/influence zone for composite solid rocket propellants

The necessity to understand the crack behaviour of composite solid rocket propellants as it helps in analysis of service life of rocket motors. Experimental data reveals that a material’s microstructure at the crack tip can have a significant effect on the local damage near the crack tip and crack growth behaviour in particulate composites. 

shear stress distribution in nanotubes

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