Subject: Re: Re: plane stress/plane strain thickness -
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Re: Creep deformation

Hi, Can you tell me how to get the strains due creep. Like how to specify the various parameters in the creep equation. Thanks Prasad --- meyh2002 <meyh2002@xxxxxxxxx> wrote: > > > Hi, > I am now doing the simulation of creep deformation. > I would like to > apply the load in a very short time and then keep > this condition for a > period of time, say 1000Hours. Now I devided the > whole process into > several steps to make this happen. What I am not > very sure is,after > loading the BC should be changed and this change > will last with time. > Is there a way to deal with this?how? > > Thanks. > > > > > > > ------------------------ Yahoo! Groups Sponsor --------------------~--> $9.95 domain names from Yahoo!. Register anything. http://us.click.yahoo.com/J8kdrA/y20IAA/yQLSAA/PMYolB/TM --------------------------------------------------------------------~->

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Re: Creep deformation

The problem is I can't change the distance between BC and Load. In other words I can't change the dimension or distance between BC and the loading BC.I am using alloys instead of soil.Any other idea? meyh --- In ABAQUS@xxxxxxxxxxxxxxx, Darwid Halim <acin_lim@xxxx> wrote: > > Hi, > > I think for your boundary conditions you don't need to > worry. You just need to make your model bigger. I mean > make the soil to 100 m away or more so that it's > boudary doesn't change with time. > > Darwid Halim > > --- meyh2002 <meyh2002@xxxx> wrote: > > > > > > > Hi, > > I am now doing the simulation of creep deformation. > > I would like to > > apply the load in a very short time and then keep > > this condition for a > > period of time, say 1000Hours. Now I devided the > > whole process into > > several steps to make this happen. What I am not > > very sure is,after > > loading the BC should be changed and this change > > will last with time. > > Is there a way to deal with this?how? > > > > Thanks. > > > > > > > > > > > > > > > > > > > __________________________________ > Do you Yahoo!? > Yahoo! Mail Address AutoComplete - You start. We finish. > http://promotions.yahoo.com/new_mail ------------------------ Yahoo! Groups Sponsor --------------------~--> $9.95 domain names from Yahoo!. Register anything. http://us.click.yahoo.com/J8kdrA/y20IAA/yQLSAA/PMYolB/TM --------------------------------------------------------------------~->

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Re: Re: plane stress/plane strain thickness

Try 2d shell elements. At 04:11 AM 10/31/04, you wrote: >I have similar object which is semi-infinite long thin plate. that is, >length=a, width=b, thickness=h. where b->infinite, and h/a<<1. > >this geometry can be simpified as "plane strain". however when h/a<<1, >more elements need to be created to get accurate results. Is it possible >to use another type of elements such as "beam" to simulate? > >Also, a clamped boundary conditon is applied at both ends along plate length. >how to apply it on the "plane strain" problem? > >Zhang > > > > > > > >Community email addresses: > Post message: ABAQUS@xxxxxxxxxxxxxxx > Subscribe: ABAQUS-subscribe@xxxxxxxxxxxxxxx > Unsubscribe: ABAQUS-unsubscribe@xxxxxxxxxxxxxxx > List owner: ABAQUS-owner@xxxxxxxxxxxxxxx > >Shortcut URL to this page: > http://groups.yahoo.com/group/abaqus >Yahoo! Groups Links > > > > ------------------------ Yahoo! Groups Sponsor --------------------~--> $9.95 domain names from Yahoo!. Register anything. http://us.click.yahoo.com/J8kdrA/y20IAA/yQLSAA/PMYolB/TM --------------------------------------------------------------------~->

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Re: plane stress/plane strain thickness (Question added)

Hi george, Ok, i am not sure if i got you right, pls correct me if i am wrong. In my case i am modelling a steel rod embedded in concrete and along half the length of the steel rod is a coating of resin. The steel rod is 25mm dia. , the resin annulus is 32mm (radial thickness of 3.5mm : 3.5 X 2= 7mm + 25mm = 32mm)and the concrete is 300mm in diameter. The length of the rod is 2200mm, resin 800mm and the concrete is 1724mm. So instead of specifying plane stress/strain thickness = 1, is it better if i specify for the steel plane stress/strain thickness = 0.025 resin plane stress/strain thickness = 0.032 concrete plane stress/strain thickness = 0.3 Thanking you in advance for your time, best regards, Ravi. --- In ABAQUS@xxxxxxxxxxxxxxx, george jefferson <george.jefferson@xxxx> wrote: > When using plane stress/strain your loads and reaction forces are all "per > unit thickness", > so you usually set it to 1 and supply/report forces as "per unit thickness" > If you know a specific dimension for the out of plane thickness then you > can supply it > and your forces become true or total force. > > Notice that if you have only displacement boundary conditions and don't request > reaction forces then the thickness doesn't enter the calculation. > > > > > > > >Good point. Then what's the exact meaning for the "plane stress/strain > >thickness=1"? ------------------------ Yahoo! Groups Sponsor --------------------~--> Make a clean sweep of pop-up ads. Yahoo! Companion Toolbar. Now with Pop-Up Blocker. Get it for free! http://us.click.yahoo.com/L5YrjA/eSIIAA/yQLSAA/PMYolB/TM --------------------------------------------------------------------~->