Blog posts

Composites modeling

Submitted by spankajkolhe on Tue, 04/07/2009 - 02:45

Hi i want to model a compsoite shaft of glass/epoxy .i am having all material properties .i want to know how to model it .and in another case there is adhesives between the two.

Thanks,

pankaj

The essential assumption of Cauchy Stress

Submitted by Xu Guo on Tue, 04/07/2009 - 01:00

The essential assumption of Cauchy Stress

is the existence of the limit (\Delta f)/ (\Delta A) as \Delta A-->0.

This means that a infinitesimal small area can only sustain infinitesimal

small surface force. Therefore in the framework of conventional continuum

mechanics, we can only talk about the "force density (stress)" at a point.

The expression int_A (f.n)dA has no physical meaning. Only int_A (stress.n)dA

can give the total force exerting on a closed surface A.

a point and a particle

Submitted by Rui Huang on Mon, 04/06/2009 - 15:22

opinion

continuum mechanics

atomistic modeling

An XFEM/level-set method to model nanostructures

Submitted by Julien Yvonnet on Mon, 04/06/2009 - 09:21

research

In the attached paper, we propose a procedure combining an XFEM/level-set technique and Gurtin-Murdoch surface elasticity to model nanostructures with arbitrary geometries. The effects of free surface which are dominant at small scales are easily captured in this framework.

Split Hopkinson Pressure Bars supplier?

Submitted by Luming Shen on Mon, 04/06/2009 - 08:48

Dear All,

I was wondering whether anyone here knows any companies or institutions which can supply the complete Split Hopkinson Pressure Bars apparatus.

Thanks for your input!

Luming

Exact solutions for elastic half-space problems

Submitted by Arun C O on Mon, 04/06/2009 - 08:27

research

Hi all

Looking for a Postdoctoral/Research Associate Position in PDE/ODE

Submitted by Pavel Aleshin on Mon, 04/06/2009 - 06:23

job

PDe

ODE

fractional derivatives

I have recently (spring–08) completed my Ph.D in PDE with the specialisation in fractional differential equations. If any Professor or research organisation has an opening for a postdoc position in the areas related to my fields of interest, please contact me alyoshinpavel [at] gmail.com

thanks for your attention

Pavel Aleshin

Calculation of natural frequency of beam

Submitted by benjaminsong on Mon, 04/06/2009 - 04:50

research

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?

Simulation of a freely-vibrating cantilever beam connected to a box with granular solid particles inside using Ansys- Ls-dyna

Submitted by abeed on Sun, 04/05/2009 - 14:28

A cantilver beam is connected to a closed box. 3 balls of different sizes and materials are inside the box. the beam was draged litle downward from the middle and then left to vibrate freely. of course, during the vibration, the balls will colide with the box walls and with each others. The question: is it possible to simulate this system with ansys? if yes, How?

Composite thermoforming-ABAQUS

Submitted by fethi ABBASSI on Sun, 04/05/2009 - 14:16

research

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

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