[Yade-users] [Question #706748]: Calculation in Marshall Mix Design
New question #706748 on Yade: https://answers.launchpad.net/yade/+question/706748 Hello, I'm trying to calculate some data from my YADE Marshall Mix Design. I want to get value such as Bulk Volume, Bulk Density, VMA, % Air Void. But the result that I get seem to be negative and incorrect. So, I am confuse on my calculation part whether I set something wrong or my formula is inccorect? ##The Following is my Code## import random import math from yade import geom, pack, utils, plot, ymport import pandas as pd # Define material properties youngModulus = 1e7 poissonRatio = 0.25 density = 2700 frictionAngle =0.7 # Create material material = O.materials.append(FrictMat(young=youngModulus, poisson=poissonRatio, density=density)) material1 = O.materials.append(FrictMat(young=youngModulus, poisson=poissonRatio, density=density, frictionAngle=frictionAngle)) # Define cylinder with funnel parameters center = (0, 0, 0) diameter = 0.102 height = 0.18 # create cylindrical body with radius 0.102 m and height 0.064 m cylinder = geom.facetCylinder(center=center, radius=diameter/2, height=height, segmentsNumber=80, wallMask=6) # assign material to each body in the cylinder for body in cylinder: body.bodyMat = material # add cylinder to simulation O.bodies.append(cylinder) # Define cylinder with funnel parameters center1 = (0,0,height/2) dBunker = 0.4 dOutput = 0.102 hBunker = 0 hOutput = 0.15 hPipe = 0 # create funnel as a bunker with diameter 0.102 m, height 0.064 m funnel = geom.facetBunker(center=center1, dBunker=dBunker, dOutput=dOutput, hBunker=hBunker,hOutput=hOutput, hPipe=hPipe, segmentsNumber=80, wallMask=4) # assign material to each body in the funnel for body in funnel: body.bodyMat = material # add funnel to simulation O.bodies.append(funnel) # define sphere parameters and number of spheres rMean1 = (0.0125+0.019)/4 rRelFuzz1 = (0.019-0.0125)/4/rMean1 num1 = 13 rMean2 = (0.0095+0.0125)/4 rRelFuzz2 = (0.0125-0.0095)/4/rMean2 num2 = 51 rMean3 = (0.00475+0.0095)/4 rRelFuzz3 = (0.0095-0.00475)/4/rMean3 num3 = 563 rMean4 = (0.00236+0.00475)/4 rRelFuzz4 = (0.00475-0.00236)/4/rMean4 num4 = 5101 rMean5 = (0.00118+0.00236)/4 rRelFuzz5 = (0.00236-0.00118)/4/rMean4 num5 = 18369 #create empty sphere packing sp = pack.SpherePack() # generate randomly sphere sp.makeCloud((-dBunker/4,-dBunker/4,1.3*height),(dBunker/4,dBunker/4,2*height), rMean = rMean1, rRelFuzz = rRelFuzz1, num = num1) sp.makeCloud((-dBunker/4,-dBunker/4,1.3*height),(dBunker/4,dBunker/4,2*height), rMean = rMean2, rRelFuzz = rRelFuzz2, num = num2) sp.makeCloud((-dBunker/4,-dBunker/4,1.3*height),(dBunker/4,dBunker/4,2*height), rMean = rMean3, rRelFuzz = rRelFuzz3, num = num3) sp.makeCloud((-dBunker/4,-dBunker/4,1.3*height),(dBunker/4,dBunker/4,2*height), rMean = rMean4, rRelFuzz = rRelFuzz4, num = num4) sp.makeCloud((-dBunker/4,-dBunker/4,1.3*height),(dBunker/4,dBunker/4,2*height), rMean = rMean5, rRelFuzz = rRelFuzz5, num = num5) # add the sphere pack to the simulation sp.toSimulation(material = material1) for body in O.bodies: if not isinstance(body.shape, Sphere): continue if body.shape.radius >= rMean1 : body.shape.color = (0,0,1) #blue if body.shape.radius <= rMean1 and body.shape.radius > rMean2: body.shape.color = (0,0,1) #blue if body.shape.radius <= rMean2 and body.shape.radius > rMean3: body.shape.color = (1,0,0) #red if body.shape.radius <= rMean3 and body.shape.radius > rMean4: body.shape.color = (0,1,0) #green if body.shape.radius <= rMean4 and body.shape.radius > rMean5: body.shape.color = (1,1,0) #yellow if body.shape.radius <= rMean5 : body.shape.color = (1,0,1) #magenta O.engines = [ ForceResetter(), # sphere, facet, wall InsertionSortCollider([Bo1_Sphere_Aabb(), Bo1_Facet_Aabb(), Bo1_Wall_Aabb()]), InteractionLoop( # the loading plate is a wall, we need to handle sphere+sphere, sphere+facet, sphere+wall [Ig2_Sphere_Sphere_ScGeom(), Ig2_Facet_Sphere_ScGeom(), Ig2_Wall_Sphere_ScGeom()], [Ip2_FrictMat_FrictMat_FrictPhys()], [Law2_ScGeom_FrictPhys_CundallStrack()] ), NewtonIntegrator(gravity=(0, 0, -1000), damping=0.3), # the label creates an automatic variable referring to this engine # we use it below to change its attributes from the functions called PyRunner(command='checkUnbalanced()', realPeriod=2, label='checker'), ] O.dt = PWaveTimeStep() # enable energy tracking; any simulation parts supporting it # can create and update arbitrary energy types, which can be # accessed as O.energy['energyName'] subsequently O.trackEnergy = True # the following checkUnbalanced, unloadPlate and stopUnloading functions are all called by the 'checker' # (the last engine) one after another; this sequence defines progression of different stages of the # simulation, as each of the functions, when the conditio
Re: [Yade-users] [Question #706748]: Calculation in Marshall Mix Design
Question #706748 on Yade changed: https://answers.launchpad.net/yade/+question/706748 Status: Open => Needs information Jan Stránský requested more information: Hello, Please provide a MWE [1]. I.e. for porosity calculation, you do not need to run whole gravity deposition and compaction. Create a cylinder, a top wall and a few spheres inside. As an advantage, you can calculate all the results simply by hand and compare to the script results. > whether I set something wrong or my formula is inccorect? What is meant by "bulk" and "air"? Spheres are "bulk" or "air"? For volume and number, you should probably exclude spheres that jumped out of the container. Or prevent jumping entirely. ># calculate the volume of the packing >volume_packing = 0 >num_spheres = 0 >for b in O.bodies: >if isinstance(b.shape, yade.wrapper.Sphere): >volume_packing += 4/3 * math.pi * b.shape.radius**3 >num_spheres += 1 Just a note (not important, result is the same): a more "pythonic" (and perhaps more readable and maintainable way) would be: ### num_spheres = len([b for b in O.bodies if isinstance(b.shape,Sphere)]) volume_packing = sum(4/3 * math.pi * b.shape.radius**3 for b in O.bodies if isinstance(b.shape, Sphere)) ### Cheers Jan [1] https://www.yade-dem.org/wiki/Howtoask -- 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
Re: [Yade-users] [Question #706748]: Calculation in Marshall Mix Design
Question #706748 on Yade changed: https://answers.launchpad.net/yade/+question/706748 Status: Needs information => Open Huan gave more information on the question: Hello Jan, - Bulk mean both Sphere and Air - Thanks for the idea, I will implement it since its easier to read - I want to calculate the same thing but when it is still loose pack(before being compress), can I just put the same calculation method into unload plate section? Thanks -- 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
Re: [Yade-users] [Question #706748]: Calculation in Marshall Mix Design
Question #706748 on Yade changed: https://answers.launchpad.net/yade/+question/706748 Status: Open => Needs information Jan Stránský requested more information: > - I want to calculate the same thing but when it is still loose pack(before being compress), can I just put the same calculation method into unload plate section? What is "the same thing"? Method should be the same, values (e.g. "top") not all. > Bulk mean both Sphere and Air OK, now I am lost :-) I would understand if spheres is bulk. Or spheres represent air bubbles and the complement is bulk. But bulk being "both Sphere and Air" sounds really unusually. Brainstorming: volume_packing ... volume of spheres new_volume_cylinder ... total volume new_bulk_volume = (new_volume_cylinder - volume_packing) new_bulk_volume is volume of void space So why is it called "bulk"? I think this is the source of the problem.. new_bulk_density = (density * volume_packing) / new_bulk_volume new_bulk_density = (mass of spheres) / (volume of void space) What is the meaning of such quantity? new_vma = (new_bulk_volume - volume_packing) * 100 What is VMA? "Voids in the Mineral Aggregate"? What is its proper definition? Why (volume of void space) - (volume of spheres)? Why * 100? new_air_void = ((new_bulk_volume -volume_packing)/new_bulk_volume)*100 void ratio? If so, it should be volume_void / volume_solid, i.e. using your variables: new_bulk_volume / volume_packing new_porosity = (new_volume_cylinder - volume_packing) / new_volume_cylinder seems OK Cheers Jan -- 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
Re: [Yade-users] [Question #706748]: Calculation in Marshall Mix Design
Question #706748 on Yade changed: https://answers.launchpad.net/yade/+question/706748 Status: Needs information => Open Huan gave more information on the question: Hello, I mistakenly took both sphere and air as bulk, but bulk is only sphere. -By the same thing, I meant Bulk Volume, Bulk Density, VMA, and % air void. Do I add the calculation code in the CheckUnblanced within the O.iter? -Bulk Volume is only the sphere I believe that the formula should have been (Total weight of sphere / Volume of Sphere) -Bulk Density should have been (Total weight of sphere / Bulk Volume) Which I assume that I should should do it by hand since I have the value of Total weight of sphere as (1200g) -VMA is Void in the Mineral Aggregate -So, % air void should've been (new_bulk_volume / volume_packing) -- 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
Re: [Yade-users] [Question #706748]: Calculation in Marshall Mix Design
Question #706748 on Yade changed: https://answers.launchpad.net/yade/+question/706748 Status: Open => Expired Launchpad Janitor expired the question: This question was expired because it remained in the 'Open' state without activity for the last 15 days. -- 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
