| iMechanica

Boat simulation-how to define the buoyancy? Can it be done in ABAQUS

Submitted by xjwang on Sun, 02/22/2009 - 17:50

Forums

I am trying to model a boat sitting in the water. I want to see the stress distribution after the boat is put in the water. If I only consider the solid boat model, I need define the weight of the boat and the buoyance otherwise the boat would not be in a equilibrium. My question is that how can I define the buoyance in ABAQUS, or I have to find an alternative to define the floating force? Since the water pressure is function of depth, I think we might be able to define the pressure at different level. But I don't know if it will works fine.Any comment will be appreciated.Thanks a lot.

Call for Abstracts - Symposium on Advanced Computational Methods for Fracture (IMECE 2009)

Submitted by Liang Xue on Sun, 02/22/2009 - 14:08

computational methods

This is topic 12-21 Advanced Computational Methods for Fracture in the upcoming ASME Congress 2009 (November 13-19, Lake Buena Vista, FL., USA.) Deadline for abstract submissio: March 2, 2009.

Evolving small structures

Submitted by Zhigang Suo on Sat, 02/21/2009 - 21:34

education

ES 242r

Spring 2004

Evolving Small Structures

I taught this course at the University of California, Santa Barbara, in Winter 1994, Winter 1995, Spring 1996; at Princeton, Spring 2003; at Harvard, Spring 2004. The notes posted here are those distributed to the class in Spring 2004.

Solve Navier type function with Green Function and Fourier Transformation

Submitted by T.ZENG on Sat, 02/21/2009 - 21:04

Navier type function Green Function Fourier Transformation

I am a freshman in micromechanics area. Many books and papers always say the linear elastic equilibrium equation(Someone also called Navier type function) could be solved with Green Function and Fourier Transformation, but without details. May be the writers think anyone should know these two popular methods in solving the PDE. I have search many books(both mathmatic and mechanics), However, there are little information about solving the navier type function with those two methods.

How does temperature become a number

Submitted by Zhigang Suo on Sat, 02/21/2009 - 14:58

education

temperature

An essential step to “understand” thermodynamics is to get to know temperature: how temperature comes down as an abstraction from empirical observations, and how it rises up as a consequence of the fundamental postulate. I have just updated my notes on temperature. The beginning paragraphs of the notes abstract temperature from empirical observations. These paragraphs are posted here.

Torsional behaviour of carbon nanotubes with abnormal interlayer distances

Submitted by haiyang song on Sat, 02/21/2009 - 09:26

Fifth MPM Workshop, Corvallis, April 2-3, 2009

Submitted by Biswajit Banerjee on Thu, 02/19/2009 - 05:03

conference

Computational Mechanics FEM MPM

From Prof. John Nairn:

Symposium on Mechanics of Thin Film and Multi-layer Materials (IMECE), Nov. 13-19, Lake Buena Vista, FL

Submitted by Jizhou Song on Wed, 02/18/2009 - 21:49

conference

Abstract submission deadline: March 2, 2009

To submit your abstracts to this symposium, select "Track 12 Mechanics of Solids, Structures and Fluids"; then select "Topic 12-26 Mechanics of Thin Film and Multi-layer Materials".

Why always warning Comment field is required

Submitted by T.ZENG on Wed, 02/18/2009 - 20:26

Comment field required warning

I want to reply to other people's comment , but when I finish the reply and clikc the "post comment" it always warns comment field is required , I Do not know what is wrong. If someone knows the problem, please tell me, thank you very much!!!

Java for High-Performance Computational Engg. / Sciences?

Submitted by Ajit R. Jadhav on Wed, 02/18/2009 - 16:03

Java

Computational Engineering

High Performance Computing

In the past few days at iMechanica, there have been quite a few messages dealing with different aspects of programming, libraries and so on...

It would perhaps be timely, therefore, to ask:

Do you have any opinion about using Java in numerical analysis (NA) / FEM / CFD etc.---i.e., in computational engineering and sciences (CES)?

Do you have any experience or hard data concerning performance of Java vis-a-vis C++ or FORTRAN, esp. for large systems, or for high-performance applications? Any pointers?

Please leave a note... Thanks in advance...

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