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added some ideas regarding the incorporation of the vegter yield criterion

This commit is contained in:
Martin Diehl 2015-03-09 11:24:06 +00:00
parent 31e3f39e9b
commit 96a3cb0667
1 changed files with 20 additions and 4 deletions
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24
processing/misc/yieldSurface.py
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@ -680,7 +680,7 @@ def principalStrs_Der(p, Invariant, s1, s2, s3, s4, s5, s6, Karafillis=False):
dS2dc4 = dS2dp3*s4; dS2dc5 = dS2dp4*s5; dS2dc6 = dS2dp5*s6 dS2dc4 = dS2dp3*s4; dS2dc5 = dS2dp4*s5; dS2dc6 = dS2dp5*s6
dS3dc4 = dS3dp3*s4; dS3dc5 = dS3dp4*s5; dS3dc6 = dS3dp5*s6 dS3dc4 = dS3dp3*s4; dS3dc5 = dS3dp4*s5; dS3dc6 = dS3dp5*s6
return dS1dc1,dS1dc2,dS1dc3,dS1dc4,dS1dc5,dS1dc6,\ return dS1dc1,dS1dc2,dS1dc3,dS1dc4,dS1dc5,dS1dc6,\ # use array type?
dS2dc1,dS2dc2,dS2dc3,dS2dc4,dS2dc5,dS2dc6,\ dS2dc1,dS2dc2,dS2dc3,dS2dc4,dS2dc5,dS2dc6,\
dS3dc1,dS3dc2,dS3dc3,dS3dc4,dS3dc5,dS3dc6 dS3dc1,dS3dc2,dS3dc3,dS3dc4,dS3dc5,dS3dc6
else: else:
@ -1052,13 +1052,17 @@ class Loadcase():
''' '''
# ------------------------------------------------------------------ # ------------------------------------------------------------------
def __init__(self,finalStrain,incs,time): def __init__(self,finalStrain,incs,time,ND=3,RD=1):
print('using the random load case generator') print('using the random load case generator')
self.finalStrain = finalStrain self.finalStrain = finalStrain
self.incs = incs self.incs = incs
self.time = time self.time = time
self.ND = ND
self.RD = RD
self.NgeneratedLoadCases = 0
def getLoadcase(self,N=0): def getLoadcase(self):
self.NgeneratedLoadCases+=1
defgrad=['*']*9 defgrad=['*']*9
stress =[0]*9 stress =[0]*9
values=(np.random.random_sample(9)-.5)*self.finalStrain*2 values=(np.random.random_sample(9)-.5)*self.finalStrain*2
@ -1081,6 +1085,18 @@ class Loadcase():
' incs %s'%self.incs+\ ' incs %s'%self.incs+\
' time %s'%self.time ' time %s'%self.time
def getVegterLoadcase(self): #for a 2D simulation, I would use this generator befor switching to a random 2D generator
defgrad=['*']*9
stress =[0]*9
NDzero=[[1,2,3,6],[1,3,5,7],[2,5,6,7]] # no deformation / * for stress
# biaxial f1 = f2
# shear f1 = -f2
# unixaial f1 , f2 =0
# plane strain f1 , s2 =0
# modulo to get one out of 4
self.NgeneratedLoadCases+=1
#--------------------------------------------------------------------------------------------------- #---------------------------------------------------------------------------------------------------
class Criterion(object): class Criterion(object):
#--------------------------------------------------------------------------------------------------- #---------------------------------------------------------------------------------------------------
@ -1263,7 +1279,7 @@ Performs calculations with various loads on given geometry file and fits yield s
""", version=string.replace(scriptID,'\n','\\n') """, version=string.replace(scriptID,'\n','\\n')
) )
# maybe make an option to specifiy if 2D/3D fitting should be done?
parser.add_option('-l','--load' , dest='load', type='float', nargs=3, parser.add_option('-l','--load' , dest='load', type='float', nargs=3,
help='load: final strain; increments; time %default', metavar='float int float') help='load: final strain; increments; time %default', metavar='float int float')
parser.add_option('-g','--geometry', dest='geometry', type='string', parser.add_option('-g','--geometry', dest='geometry', type='string',