Instantaneous centre of rotation
Hi everybody! I'm glad to join iMechanica, just hope to contribute something of interest...and share our penchant for this fascinating subject with all of you
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?
Young's modulus
Forums
Hi all,
I have this confusing thought for a quite long time.
Is there any relation between the time-independent Young's modulus with
the time-dependent Young's modulus (instantaneous and equilibrium
moduli or loss and storage moduli)?
If yes, what is the equation to relate them?
So many terminologies which make this confusion!
Please help.
Wanbot
Modelling Hyper-elastic Plate Using ABAQUS
Dear All,
For months, I have tried to model a plate with circular hole which has the properties of hyper-elastic material (Ogden) but the results are still not promising compared to literature (Y Basar 1998). The main problems are:
1. The maximum load I succeeded to apply was q=26, while literature had applied load up to 90. For q > 26, the analysis will terminate with errors such as too many attempt, excessive distortion etc.
2. The results I get for q<26 are not the same as literature.
I attach my best result for your viewing.
Paul Germain passed away
The present and past officers of the International Union for Theoretical and Applied Mechanics, the present and past presidents of the French National Committee for Mechanics, sadly announce the death of
Professor Paul Germain,
Honorary Secretary of the French Academy of Sciences
President of IUTAM 1988-1992
Vice-President of IUTAM 1992-1996
Leading scientist in the mechanical sciences
in Paris on 26 February 2009
Finding all roots of a nonlinear function
Forums
I need to find all possible roots of a nonlinear function in six
variables y = f(x_1,x_2,x_3,x_4,x_5,x_6), where 0 <= x_i <=
x_max. The function is not available in closed form. I saw there are
some methods available (e.g., http://www.springerlink.com/content/y8g01h854693g876/). Could someone point me to a code I can directly use ?
Regards,
Deepak
Multiple positions in experiments and CFD
Multiple, assistant researcher/research scientist/postdoctoral positions are available in a large, 4-year duration, Department of Defense program on “Release, Atmospheric Dispersal, and Environmental Fate of Liquid Agents”. The effort is aiming to: (a) achieve a basic understanding of the physics of aero-breakup and dispersal of liquid agents in high-speed flows, (b) achieve a basic understanding of impact/spreading/absorption/reaction/evaporation of drops falling on various substrates, and (c) develop and validate computational tools covering the hierarchy of scales involved and purp
9th World Congress on Computational Mechanics WCCM/APCOM2010
Australia is the host for the 9th World Congress on Computational Mechanics and 4th Asian Pacific Congress on Computational Mechanics in 2010. Sydney is without a doubt one of the most beautiful cities in the world. It has a reputation for friendly people, a cosmopolitan lifestyle, wonderful shopping and world class entertainment. Our magnificent harbour, renowned Opera House and sunny beaches combine to make Sydney a unique destination.