New question #676370 on Yade: https://answers.launchpad.net/yade/+question/676370
Hi, I'm trying to simulation triaxial test by using https://github.com/yade/trunk/blob/master/examples/triax-tutorial/script-session1.py wiht some minor modifications. It works well with young = 100e6, but it encountered some problems when I set young = 500e6. Most of this simulation works normally, but then there will be the following prompts in the terminal and the simulation stopped. In [1]: Unhandled exception in thread started by <function liveUpdate at 0x7f0388a37320> --------------------------------------------------------------------------- ValueError Traceback (most recent call last) /usr/lib/x86_64-linux-gnu/yade/py/yade/plot.py in liveUpdate(timestamp) 506 for ax in axes: 507 try: --> 508 ax.relim() # recompute axes limits 509 ax.autoscale_view() 510 except RuntimeError: pass # happens if data are being updated and have not the same dimension at the very moment /usr/lib/python2.7/dist-packages/matplotlib/axes/_base.pyc in relim(self, visible_only) 1936 for line in self.lines: 1937 if not visible_only or line.get_visible(): -> 1938 self._update_line_limits(line) 1939 1940 for p in self.patches: /usr/lib/python2.7/dist-packages/matplotlib/axes/_base.pyc in _update_line_limits(self, line) 1799 Figures out the data limit of the given line, updating self.dataLim. 1800 """ -> 1801 path = line.get_path() 1802 if path.vertices.size == 0: 1803 return /usr/lib/python2.7/dist-packages/matplotlib/lines.pyc in get_path(self) 955 """ 956 if self._invalidy or self._invalidx: --> 957 self.recache() 958 return self._path 959 /usr/lib/python2.7/dist-packages/matplotlib/lines.pyc in recache(self, always) 665 y = self._y 666 --> 667 self._xy = np.column_stack(np.broadcast_arrays(x, y)).astype(float) 668 self._x, self._y = self._xy.T # views 669 /usr/lib/python2.7/dist-packages/numpy/lib/stride_tricks.pyc in broadcast_arrays(*args, **kwargs) 247 args = [np.array(_m, copy=False, subok=subok) for _m in args] 248 --> 249 shape = _broadcast_shape(*args) 250 251 if all(array.shape == shape for array in args): /usr/lib/python2.7/dist-packages/numpy/lib/stride_tricks.pyc in _broadcast_shape(*args) 182 # use the old-iterator because np.nditer does not handle size 0 arrays 183 # consistently --> 184 b = np.broadcast(*args[:32]) 185 # unfortunately, it cannot handle 32 or more arguments directly 186 for pos in range(32, len(args), 31): ValueError: shape mismatch: objects cannot be broadcast to a single shape axial strain reach Limitation, stop loading! Has anybody met the same problem? How can I solve it ? regards Cloud The whole code : from yade import pack num_spheres=5000 key='_My_triax_' targetPorosity=0.40 compFricDegree=20 finalFricDegree=30 rate=-0.02 damp=0.2 stabilityThreshold=0.01 young=500e6 mn,mx=Vector3(0,0,0),Vector3(1,1,2) confiningStress=100000 O.materials.append(FrictMat(young=young,poisson=0.1,frictionAngle=radians(compFricDegree),density=2600,label='spheres')) O.materials.append(FrictMat(young=young,poisson=0.1,frictionAngle=0,density=0,label='walls')) walls=aabbWalls([mn,mx],thickness=0,material='walls') wallIds=O.bodies.append(walls) sp=pack.SpherePack() sp.makeCloud(mn,mx,-1,0.1,num_spheres,False, 0.95,seed=1) O.bodies.append([sphere(center,rad,material='spheres') for center,rad in sp]) triax=TriaxialStressController( maxMultiplier=1.+2e4/young, finalMaxMultiplier=1.+2e3/young, thickness = 0, stressMask = 7, internalCompaction=True, ) O.engines=[ ForceResetter(), InsertionSortCollider([Bo1_Sphere_Aabb(),Bo1_Box_Aabb()]), InteractionLoop( [Ig2_Sphere_Sphere_ScGeom(),Ig2_Box_Sphere_ScGeom()], [Ip2_FrictMat_FrictMat_FrictPhys()], [Law2_ScGeom_FrictPhys_CundallStrack()] ), GlobalStiffnessTimeStepper(active=1,timeStepUpdateInterval=100,timestepSafetyCoefficient=0.8), triax, TriaxialStateRecorder(iterPeriod=100,file='WallStresses'+key), NewtonIntegrator(damping=damp) ] Gl1_Sphere.stripes=0 yade.qt.Controller(),yade.qt.View() triax.goal1=triax.goal2=triax.goal3=-confiningStress while 1: O.run(1000, True) unb=unbalancedForce() print 'unbalanced force:',unb,' mean stress: ',triax.meanStress if unb < stabilityThreshold and abs(-confiningStress-triax.meanStress)/confiningStress<0.001: break O.save('confinedState'+key+'.yade.gz') print "### Isotropic state saved ###" import sys while triax.porosity > targetPorosity: compFricDegree = 0.95*compFricDegree setContactFriction(radians(compFricDegree)) print "\r Friction: ", compFricDegree,"porosity:", triax.porosity, sys.stdout.flush() O.run(500,1) O.save('compactedState'+key+'.yade.gz') print "### Compacted state saved ###" triax.internalCompaction=False setContactFriction(radians(finalFricDegree)) triax.stressMask = 3 triax.goal3 = rate triax.goal1=-confiningStress triax.goal2=-confiningStress newton.damping=0.1 O.saveTmp() from yade import plot def history(): plot.addData( e11=-triax.strain[0], e22=-triax.strain[1], e33=-triax.strain[2], ev=triax.strain[0]+triax.strain[1]+triax.strain[2], s11=-triax.stress(triax.wall_right_id)[0], s22=-triax.stress(triax.wall_top_id)[1], s33=-triax.stress(triax.wall_front_id)[2], devi = -triax.stress(triax.wall_front_id)[2] + triax.stress(triax.wall_top_id)[1], i=O.iter) def stoploading(): axial_strain = abs(triax.strain[2]) if axial_strain > 0.2: print 'axial strain reach Limitation, stop loading!' O.pause() if 1: O.engines=O.engines[0:5]+[PyRunner(iterPeriod=20,command='history()',label='recorder')]+O.engines[5:7] O.engines=O.engines+[PyRunner(command='stoploading()',iterPeriod=10)] else: O.engines[4]=PyRunner(iterPeriod=20,command='history()',label='recorder') O.run(100,True) plot.plots={'e33':('ev',),' e33 ':('devi') } plot.plot() plot.saveDataTxt('results'+key) plot.saveGnuplot('plotScript'+key) -- 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
