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Calculation of natural frequency of beam

1. How to Compute the first three natural frequencies of vibration of cantilever beam?

2. How to Compute the first three natural frequencies of vibration of simple support beam?

3. What is Euler column formula?

fethi ABBASSI's picture

Composite thermoforming-ABAQUS

I need to modeling  an example of thermoforming of composite (woven PPS/ Carbone) on ABAQUS, which can help me (if possible to give me a tutorial)
thank you

Difference in vibrational characteristic of CNT in Thermal Environment

Can anybody suggets, (especially working in experimental field on CNTs ) whether there is any change in vibrational characteristics in CNTs subjected to temperature change.(especially in fundamnetal frequency values)

Mechanism To Increase Energy Efficiency.

 It is about using Cam for increase
energy efficiency. Cam are generally used to open and close valve of IC
Engine. I am going to show you another use. Left side initial position.
Right side final position. Redius of cam continuously decrease.Sliding
weight (MG) applied on Cam. With the help of rope weight(MG*Cos(b)) is
fixed with cam. We consider b as 45. So cos 45=.70. This fixed weight
should be 0.70 MG. Which balance the sliding weight applied on cam in
tengential direction. As sliding weight come down the fixed weight go

Equivalent Mass and Stiffness Distribution

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Hello everyone,

Mechanism To Increase Energy Efficiency.

View the figure attached. It is about using Cam for increase
energy efficiency. Cam are generally used to open and close valve of IC
Engine. I am going to show you another use. Left side initial position.
Right side final position. Redius of cam continuously decrease.Sliding
weight (MG) applied on Cam. With the help of rope weight(MG*Cos(b)) is
fixed with cam. We consider b as 45. So cos 45=.70. This fixed weight
should be 0.70 MG. Which balance the sliding weight applied on cam in
tengential direction. As sliding weight come down the fixed weight go
up. But the twist is the redius of cam decrease nominal continuously.
So sliding weight come down little bit and fixed weight go up much
more. We consider sliding weight come dowm H2 height and fixed weight

Arash_Yavari's picture

"Time variation of a fundamental dimensionless constant"

http://arxiv.org/PS_cache/arxiv/pdf/0903/0903.5321v1.pdf

The above article is an April Fool's joke. It reminded me of the recent "discoveries" in the mechanics community regarding stress tensor.

Regards,
Arash

Sigma_rr

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Sigma_rr

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FEA modelling with ABAQUS 6.6 of three roller Flow forming process.

Hi

this is Probal from university of western ontario (UWO). I am working on three roller flow forming process and i have to model the deformation specially in the splined area. could you please give me any idea or give any link so that i can have an idea what to do.

thank you probal 

References for Motion Groups

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I want to find a reference to learn about motion groups SE(N). Any recommendations will be appreciated. Regards, Deepak Trivedi

CYLINDERICAL PANEL

I AM DOING RESEARCH IN VIBRATION OF SOLID CYLINDERICAL PANEL CAN ANY ONE KNOWS THE EXACT DIAGRAM PLEASE HELP ME

Molecular dynamic simulations for carbon nanotubes

When using molecular dynamics simulations to study the variation of buckling strain versus aspect ratio of SWCNTs, is it necessary to keep the strain rate constant or displacement rate constant? Kindly appreciate your comments.

Modeling concrete wrapped CFRP sheet using ANSYS

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Hi all

 

I am currently in my Master Degree in Civil Engineering at University of Michigan. I am doing a research on concrete wrapped CFRP sheets and I want to do Finite Element Analysis using ANSYS. I am not able to model concrete in ANSYS. Can anyone please help me out with that.

 

Awaiting the reply....

 

Thank you

Regards

Chirag Kapadia 

How to get a sponsorship in the chemical area?

I have a friend who is studying to be a PHD in the Chemistry area, however, he needs to find new sponsorship to finalize his research, which is about AIDS.

Can anyone give him some ideas?

thanks

 <a href=http://www.erandolph.com>Chicago Resident</a>

 

Abaqus UEL subroutine help

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Greetings to all Imechanicans ! ,

I just started using the scripting interface in Abaqus, and i stumbled into a small issue, I have a sample input file which is a small model for crack simulation and its UEL subroutine, I know how to open the input file  but I don't know how to open the UEL subroutine that goes with it, I get the following error :

The model "projGH" has been created.

orthogonal cutting

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can anybody help me in performing orthogonal machining in carbon fiber composites using ABAQUS/EXPLICIT????

regds arun...

Quasi Linear Viscoelasticity vs. Linear Viscoelasticity

Can anyone explain what is main difference between Linear Viscoelasticity vs qlv (Quasi linear Viscoelasticity) proposed by Fung.  As far as I understand stress relaxation function and elastic response functions separated and given in convolution form which provides "strain rate independent" results in qlv application.  

Is linear viscoelastic description is strain dependent?

Gyanender Singh's picture

Hashin damage model for fiber reinforced composite in ABAQUS

Hi Everyone,

I am doing a project in which I am trying to study about the
drilling of composite. The aim is to optimize the drill and process
parameters to minimize the damage. For this I have tried to simulate
the drilling process in ABAQUS and I am using the Hashin damage model.
The problem is that Hashin damage model works only for the lamina which
takes only plane stress elements. Since only plane elements are allowed
I am unable to simulate cutting action of drill as the composite plate
is effectively 2D.

TRANSIENT TEMPERATURE ANALYSIS IN ABAQUS...

Hello freinds

I am facing problems with ABAQUS in doing the transient temperature analysis,and creep analaysis,,

can any one sujjest me about the porcedure step by step in ABAQUS for solving the heat trasfer problems and creep anlyisis rpoblems..

it willl be help ful for me ..please............

and one more question how can i fine online tutorials for ABAQUS 6.1.6

please guide me by sujjestting the solutons for aboove problems..

i am struck with these problems cant able to continue my research...please consider me..

ABAQUS FEA Simulation for Beam on Elastic Foundation

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Hi all friends:
   I am recently encounter a problem concerning defining beam on elastic foundation model in ABAQUS.
   Could someone please give me some instructions to set up that model or give me some hints about that?
   Appreciate.
Regards.
Henry.

zishun liu's picture

International Journal of Applied Mechanics (IJAM)

Dear Colleagues:The inaugural issue of International Journal of Applied Mechanics (IJAM) is now available on IJAM's website and all papers can be downloaded freely. IJAM website: http://www.worldscinet.com/ijam/ijam.shtml Regards

LECAM's picture

Experimental analysis of prepreg tack

Dear all, I post a study dealing with tack of prepreg materials. This kind of composite materials is increasingly used in the design of structural parts, particularly in the aerospace industry.Tack is one of the major properties that governs the ability of prepreg to be laid up. To investigate this property, we have developed a probe tack test to evaluate the effect of the temperature, the contact time, the contact force and the debonding rate on it.

How to explain the limit load by stiffness matrix using finite element analysis?

I always have a question about the convergence problem: when a structure reaches its maximum load-bearing ability, the solution will end if the newton method is used in the finite element analysis. Then which form the stiffness stiffness in the finite element analysis takes on?  Singular or ill-conditioning?  How to explain the appearance of maximum load by variable stiffness matrix?

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