Haiming Zhang
parent
fd75772a3f
commit
cc6138ec41
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@ -51,6 +51,8 @@ def stressInvariants(lambdas):
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Is = Is.reshape(3,np.shape(lambdas)[1])
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return Is
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def formatOutput(n, type='%14.6f'):
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return ''.join([type for i in xrange(n)])
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# ---------------------------------------------------------------------------------------------
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# isotropic yield surfaces
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@ -224,33 +226,22 @@ class Criterion(object):
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print('fitting to the %s criterion'%name)
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def fit(self,stress):
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if self.name.lower() == 'tresca':
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funResidum = Tresca
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text = '\nCoefficient of Tresca criterion:\nsigma0: '+formatOutput(1)
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elif self.name.lower() == 'vonmises':
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funResidum = HuberHenckyMises
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text = '\nCoefficient of Huber-Mises-Hencky criterion:\nsigma0: '+formatOutput(1)
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elif self.name.lower() == 'drucker':
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funResidum = Drucker
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text = '\nCoefficient of Drucker criterion:\nsigma0, C_D: '+formatOutput(2)
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elif self.name.lower() == 'hill48':
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funResidum = Hill1948
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text = '\nCoefficient of Hill1948 criterion:\n[F, G, H, L, M, N]:\n'+formatOutput(6)
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try:
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popt, pcov = curve_fit(Tresca, stress, np.zeros(np.shape(stress)[1]))
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print '--\nTresca:'
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print 'sigma0 %f'%popt
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except Exception as detail:
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print detail
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pass
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try:
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popt, pcov = curve_fit(HuberHenckyMises, stress, np.zeros(np.shape(stress)[1]))
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print '--\nHuberHenckyMises:'
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print 'sigma0 %f'%popt
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except Exception as detail:
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print detail
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pass
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try:
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popt, pcov = curve_fit(Drucker, stress, np.zeros(np.shape(stress)[1]))
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print '--\nDrucker:'
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print 'sigma0 , C_D ', popt
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except Exception as detail:
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print detail
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pass
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try:
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popt, pcov = curve_fit(Hill1948, stress, np.zeros(np.shape(stress)[1]))
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print 'Hill48', popt
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popt, pcov = \
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curve_fit(funResidum, stress, np.zeros(np.shape(stress)[1]))
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print (text%popt)
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except Exception as detail:
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print detail
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pass
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@ -333,17 +324,23 @@ def doSim(delay,thread):
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upper,lower = table.data[line,9],table.data[line-1,9] # values for linear interpolation
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yieldStress[i] = table.data[line-1,0:9] * (upper-threshold)/(upper-lower) \
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+ table.data[line ,0:9] * (threshold-lower)/(upper-lower) # linear interpolation of stress values
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yieldStress[i][1] = (yieldStress[i][1] + yieldStress[i][3])/2.0
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yieldStress[i][2] = (yieldStress[i][2] + yieldStress[i][6])/2.0
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yieldStress[i][5] = (yieldStress[i][5] + yieldStress[i][7])/2.0
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yieldStress[i][3] = yieldStress[i][1]
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yieldStress[i][6] = yieldStress[i][2]
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yieldStress[i][7] = yieldStress[i][5]
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break
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else:
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line+=1
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s.acquire()
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global stressAll
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print len(yieldStress)
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print('number of yield points of sim %i: %i'%(me,len(yieldStress)))
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print('starting fitting for sim %i from %s'%(me,thread))
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try:
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for i in xrange(int(options.yieldValue[2])):
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stressAll[i]=np.append(yieldStress[i]/10.e8,stressAll[i])
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stressAll[i]=np.append(yieldStress[i]/unitGPa,stressAll[i])
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myFit.fit(stressAll[i].reshape(len(stressAll[i])//9,9).transpose())
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except Exception:
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print('could not fit for sim %i from %s'%(me,thread))
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@ -377,17 +374,17 @@ parser.add_option('-l','--load' , dest='load', type='float', nargs=3,
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help='load: final strain; increments; time %default', metavar='float int float')
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parser.add_option('-g','--geometry', dest='geometry', type='string',
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help='name of the geometry file [%default]', metavar='string')
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parser.add_option('--criterion', dest='criterion', choices=fittingCriteria.keys(),
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parser.add_option('-c','--criterion', dest='criterion', choices=fittingCriteria.keys(),
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help='criterion for stopping simulations [%default]', metavar='string')
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parser.add_option('--fitting', dest='fitting', choices=thresholdParameter,
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parser.add_option('-f','--fitting', dest='fitting', choices=thresholdParameter,
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help='yield criterion [%default]', metavar='string')
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parser.add_option('--yieldvalue', dest='yieldValue', type='float', nargs=3,
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parser.add_option('-y','--yieldvalue', dest='yieldValue', type='float', nargs=3,
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help='yield points: start; end; count %default', metavar='float float int')
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parser.add_option('--min', dest='min', type='int',
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help='minimum number of simulations [%default]', metavar='int')
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parser.add_option('--max', dest='max', type='int',
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help='maximum number of iterations [%default]', metavar='int')
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parser.add_option('--threads', dest='threads', type='int',
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parser.add_option('-t','--threads', dest='threads', type='int',
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help='number of parallel executions [%default]', metavar='int')
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parser.set_defaults(min = 12)
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parser.set_defaults(max = 30)
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@ -420,6 +417,7 @@ if not os.path.isfile('numerics.config'):
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if not os.path.isfile('material.config'):
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print('material.config file not found')
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unitGPa = 10.e8
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N_simulations=0
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s=threading.Semaphore(1)
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