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ENERGY IN THE AGE OF CLIMATE CHANGE - Italy Joins European Nuclear Power Revival

Submitted by Mike Ciavarella on
research
nuclear energy
grand challenges in engineering

Speaking of Grand Challenges, why we never talk of Energy in Imechanica? There are certainly mechanical implications. And Energy is top of the list at the www.engineeringchallenges.org project.

http://www.spiegel.de/international/europe/0,1518,druck-554969,00.html&…;

Italy Joins European Nuclear Power Revival

 

Simple ABAQUS beam contact problem (errors)

Submitted by PJtree23 on
Forums
Computational Mechanics Forum
Choose a channel featured in the header of iMechanica
research

Hello,

 

Just started ABAQUS last week.  How can I model to beam that contact
each other?  They just seem to go through each other, and when I define
interaction contraints as "ridgid" bodies the I get several errors.

 

Does anyone have a link or a copy of a tutorial I could go through showning exactly how to run a contact element case?

 

Thanks,

PJ 

(sorry if you already saw this in as imechanica, i didnt see how to select the correct section) 

Time dependent vs Independent

Submitted by HariKrishna on
research
computational mechanics
Plasticity
creep

In Computational mechanics, for rate(time) dependent calculations (eg. Creep, plasticity), when we say time step dt, does it mean physical time.

Can I think this way:

I start at time 0 and calculate stress, strain etc  after 1 sec, 2 sec, 3 sec..

Also, what exactly is strain rate? why do some books say ..'when a strain rate is applied'''..I'm confused..dont we just apply displacement or force all the time.

Modeling of cohesive zone model (CZM) using MSC.Marc

Submitted by wangyl on
research

Hello everybody,

I am a new comer here and I need some help. I want to simulate the interface debonding process of  bimaterial using the commercial FE software msc.marc, but I want to use my own cohesive law not the one given by the marc. so the user subrotine UCOHESIVE must be used, the problem is I dont know how to program using FORTRAN. I hope some one here can help me, if  you have such a user subrotine, can you kindly sent it to me? that will give me a great hand. Thank you very much. Expect your reply.

Newsletter for the ASME Committee on Constitutive Equations - Summer 2008

Submitted by Gregory M. Odegard on
research
constitutive modeling
constitutive equations

Mechanics community,

Please find attached the summer 2008 edition of the ASME Committee on Constitutive Equations Newsletter.  Included in the newletter is an article written by Prof. Ostoja-Starzewski on "Homogenization and Size of Representative Volume Element (RVE)".

 

Thanks,

Greg Odegard

Accounting for the overhang (or under etch) in MEMS resonantor structures

Submitted by adiga on
research
Overhang or under etch in cantilever resonantor structures

Hi,

 

   I am wondering if there is a simple way to account for the overhang (or the under etch) in cantilever resonator structures when we are estimating for the resonant frequency of the  same. It will be a great help.

 

Thanks,

 

Vivek Adiga 

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