Question #403169 on Yade changed: https://answers.launchpad.net/yade/+question/403169
Status: Open => Answered Chareyre proposed the following answer: Hello. This question is to vague hence unlikely to receive a response. What is the meaning of "dramatically altered"? Is it certain that the script generates a sensible mechanical system for every size? Etc Le 19 oct. 2016 06:08, "liukeqi" <question403...@answers.launchpad.net> a écrit : > New question #403169 on Yade: > https://answers.launchpad.net/yade/+question/403169 > > Hi, everyone > I want to make a simple example to simulate the behaviour of concrete > under pressure load. I used the periodic boundary and I suffered a > question. I found that the stress-strain relationship will dramatically > altered as I changed the size of the periodic boundary(that is the number > of the bodies), but I need the relative stability result to convince > others. I want to know how many number of bodies will lead to a steady > result that will not dramatically alter as the number of bodies continue > increasing. The following is my code, and you can alter the initSize to > change the size of the periodic boundary. Can you give me some suggestions? > Thank you. > > ################################################# > #!/usr/bin/python > import string > from yade import plot,qt > from yade.pack import * > from yade import pack, plot > > O.materials.append(CpmMat(young=24e9,density=4800,frictionAngle=atan(0.8), > poisson=0.2,sigmaT=600e6,epsCrackOnset=1e-4,relDuctility=35)) > > initSize=0.025 > > sp=pack.randomPeriPack(radius=.000625,initSize=Vector3( > initSize,initSize,initSize)) > O.periodic=True > sp.toSimulation() > > > O.dt=1e-7 > > > plot.plots={'ey':('sy',)} > def plotAddData(): > plot.addData( > sy=p3d.stress[1], > ey=p3d.strain[1], > ex=p3d.strain[0] > ) > > EnlargeFactor=1.5 > EnlargeFactor=1.0 > O.engines=[ > ForceResetter(), > InsertionSortCollider([Bo1_Sphere_Aabb(aabbEnlargeFactor= > EnlargeFactor,label='bo1s')]), > InteractionLoop( > [Ig2_Sphere_Sphere_ScGeom(interactionDetectionFactor= > EnlargeFactor,label='ig2ss')], > [Ip2_CpmMat_CpmMat_CpmPhys()], > [Law2_ScGeom_CpmPhys_Cpm()]), > NewtonIntegrator(), > Peri3dController( > > nSteps=4000, > # how many time steps the simulation will last > # after reaching > nSteps do doneHook action > doneHook='print > "Simulation with Peri3dController finished."; O.pause()', > > # the prescribed > path (step,value of stress/strain) can be defined in absolute values > > # or in relative > values > > # if the goal > value is 0, the absolute stress/strain values are always considered (step > values remain relative)plot.plots={'ex':('sx',)} > > # if ##Path is not > explicitly defined, it is considered as linear function between (0,0) and > (nSteps,goal) > # as in yzPath and > xyPath > # the relative > values are really relative (zxPath gives the same - except of the sign from > goal value - result as yyPath) > > > # variables used > in the first step > label='p3d' > ), > PyRunner(command='plotAddData()',iterPeriod=1), > ] > > > > p3d.stressMask=0b100001 # prescribed ex,ey,sz,syz,ezx,sxy; > e..strain; s..stress > p3d.goal=(0,-0.008,0,0,0,0) #xx, yy, zz, yz, zx, xy > O.step() > bo1s.aabbEnlargeFactor=ig2ss.interactionDetectionFactor=1. > O.run(); O.wait() > plot.plot(subPlots=False) > > > > > > > > -- > You received this question notification because your team yade-users is > an answer contact for Yade. > > _______________________________________________ > Mailing list: https://launchpad.net/~yade-users > Post to : yade-users@lists.launchpad.net > Unsubscribe : https://launchpad.net/~yade-users > More help : https://help.launchpad.net/ListHelp > > -- You received this question notification because your team yade-users is an answer contact for Yade. _______________________________________________ Mailing list: https://launchpad.net/~yade-users Post to : yade-users@lists.launchpad.net Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp