iMechanica - Composites - Comments

This is a great post ! it

jeena1986 — Tue, 17 Jan 2012 17:12:52 -0500

This is a great post ! it was very informative. I look forward in reading more of your work. Also, I made sure to bookmark your website so I can come back later. I enjoyed every moment of reading it. Thesis Proposal Writing - Research Proposal Writing

Your blog is great. Your

jeena1986 — Tue, 17 Jan 2012 17:12:32 -0500

Your blog is great. Your thoughts are also very good and i am very inspired from your post. That is why I visit this blog again and again and will come back in future too. Admission Essay Writing - Assignment writing - Book Report Writing

Yours SincerelyMin Yi

Min Yi — Tue, 03 Jan 2012 10:45:16 -0500

Congratulation for the nice work! I think Prof. Chen will facilitate the development of solid mechanics in BUAA and change the pattern that engineering projects predominate and little contribution is made to the fundamental research.

some questions here...

LG — Tue, 20 Dec 2011 10:42:12 -0500

I personally hold that the topics are interesting and very hot now, however, some enquiries should address:

1. why we need the composites for the wind turbine? In order to improve the reliability of the turbine or the blade? we aim to improve the geometry of turbine or the material quality of each blade?

2. For the wind energy application, the turbine are rotated by the natural airflow at comparatively low velocity. If the composited blade can improve the efficiency of the airflow for fast rotation? We aim to reduce the weight or improve the micro-surface of the blades?

3. To my knowledge, there are only one turbine for each wind engine, if it is possible to install parallel multiple turbines (for instance, two turbines) in each engine though the rotative speed and the orientation may be different ?

4. What are the materials be used in the turbine for wind energy applications now?

Thanks

Regards, LG

Hi YiPan Thanx a lot

setareh — Sun, 07 Aug 2011 16:55:20 -0400

Hi YiPan

Thanx a lot for your suggestion.I will try that!

JEMT

YiPan — Sun, 07 Aug 2011 16:11:18 -0400

try this: journal of engineering materials and technology

I have the asnwer now, I

setareh — Sat, 06 Aug 2011 01:33:51 -0400

I have the asnwer now, I willput it here in case it turns useful for anyone
else:

1&2- Yes, using different fibre orientations in the composite plies will
make it stronger in different directions which is obviously an advantage.

3- Delamination is one of the major failure modes in composites subjected to
impact. If the orientation of fibres are different from each other in two
adjacent plies, the possibility of delamination happening at that interface is
much higher. The underlying reason originates from what happens in the curing
process and that the fibres are not impregnated well into the resin at the
interface of two plies if they have different orientation.

Setareh

I have found some info with

setareh — Wed, 20 Apr 2011 08:36:14 -0400

I have found some info with this regard,I will put it here in case it might turn in useful for others:

"mesh sensitivity of strain-softening materials is due to the local loss of ellipticity,or,equivalently,loss of hyperbolicity for dynamic loadings.Since the underlying reason is of a mathematical rather than of a numerical nature,the sensitivity to discretization occurs for any discretization method,including the mesh free methods." Rene de Borst

If you use a general-purpose

Wenbin Yu — Tue, 01 Mar 2011 00:41:13 -0500

If you use a general-purpose micromechancs code like VAMUCH , you should have not problem to get all the 3D properties within one analysis over the unit cell.

If you use VAMUCH

Wenbin Yu — Mon, 28 Feb 2011 22:25:14 -0500

Dear Ghouse,

If you use VAMUCH, details can be found at hifi-comp.com, you don't have to worry about applied loads and boundary conditions as the code does nto require such inputs.

Wenbin

Re: Reliability

Biswajit Banerjee — Tue, 01 Feb 2011 19:53:42 -0500

A recent paper related to our work is

"Error bounds for the reliability index in finite element reliability analysis" by L. Gallimard in IJNME.

DOI: 10.1002/nme.313

-- Biswajit

density model of AMC

simanchal — Mon, 22 Nov 2010 07:35:53 -0500

Sir ,

If density changes for porous material on compression, is there any numerial model for density that we can put in FEM analysis ,to obtain comapction model .

with sincerity

Simanchal

Dear Prof. Willis, thank

Michele Brun — Tue, 16 Nov 2010 19:39:06 -0500

Dear Prof. Willis,

thank you for your notes.

I started my research on composites through these notes!!!!!

Thanks a lot!

JDI — Tue, 16 Nov 2010 08:34:32 -0500

So nice!

JDI

Dear John, Thanks for

jiangyuli — Sun, 14 Nov 2010 12:09:50 -0500

Dear John,

Thanks for sharing with us these wonderful notes. Have you considered to expand them into a book, along with your later work on nonlinear composites and polycrystals? That will be really great to the field.

Best regards,

Jiangyu