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Thermal resistance

How can i prove that the thermal resistance in a sphere ( Biot number >> 1 ) mainly determans the speed of the heat transfer. Hope somebody can help me with this problem

IPEBS

Hi,

I am intrested in Process piping design and saw an institude in India  called IPEBS based in HYDERABAD  that offers such courses. I would like to know if this institude is a good one. Other recomendations are welcome.

Thanks for your information.

Ethan

ABAQUS model for special joint element and spring element

Very urgent two enquires:

1. How to model rotational spring element in order to define a curve
like M=k*(theta) where theta is the rotaional angle? It seems that
abaqus could only provide F=kx model.

 

2. there is a dashpot connector element which behaves like F=C * V
(where C is a constant), can I ask how to model F=C*(dv/dt)=C*a(where a
is the derivative of change of velocity)?

Thanks.

simulation of compact tension tests

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I am a student and I need to simulate compact tension test so as to obtain the fracture toughness using ABAQUS. I would have to compare the fracture toughness value from ABAQUS with values obtained from experiment.

I have been trying to model the compact tension test for weeks without sucess. Can anyone give me the step by step description of how to model the compact tension test

Thank you 

REG: ANALAYSIS OF COMPOSITE SHELL IN ANSYS

 im doin my final yr proj on composite shell......actually my structure involve a single layerd and a bidirectional fiber orientation...

But i felt really tough in solving usin ANSYS..i started my proceedings with some approximations ie) i hav used modelling->layup option with an assumption of 0.5 mm thick layer of 0 deg orientation....nd remaining 0.5mm thick layer of 90 deg orientation...

Bending stress of a "T" collored tube kind of structure

Hi everyone,

I am a under graduate (B.E-Mechanical) student carrying out project for my curriculam.

In this project I was alloted to study the strength of collered tube kind of product. In this product I have to study the stress at fillet region (Please refer the attached presentation) and suggest the required section improvement.

According to my knowledge, fillet region would undergo two kind of stresses

1. Normal stress (stress due to axial load and bending stress due to moment arm from the fixed end)

shell 181 for polymer composites

hi guys,

         can anyone tell me whether a semi rigid PVC foam  can be analysed by taking shell 181 material and if possible please provide me with details regarding the layer configuration of this material type.

polymer material analysis in ansys

hey guys,

             i am doing a project on composite polymer materials and i am really in a terrible state with no knowledge about how i am going to analyse polymer materials in ansys. If anybody else has the details or idea please send me the data.

 

Tsai-Wu criteria on ANSYS

Hello everyone.

I'm trying to apply the Tsai-Wu criteria to a composite plate in ANSYS. I'm using the SHELL99 element.

However, when I input the data for the criteria an error occours and ANSYS won't show me any results on the criteria.

Can someone help me? How do I use this criteria and what data should I use?

Thanks in advance 

hi everybody,

 i'm studying M.S(materials science) and i"m interested in knowing how to do a project work in indenting and extracting mechanical properties of materials using ABAQUS software or using MATLAB. suggest any idea thanks a lot in advance. have a nice time.

Composite structures in Ansys

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I am trying to analyze a honeycomb core sandwich assembly in Ansys and am having trouble. Using shell 91 do I input the layers under real constants or as a shell input. Thanks

What is a Tensor quantity

dear all,

Can any body define clearly what is a Tensor Quantity for me please....

Thanking U,

Ravichand

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

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