DAMASK_EICMD/processing/post/h5_addMises.py

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#!/usr/bin/env python2.7
# -*- coding: UTF-8 no BOM -*-
import os
import sys
import math
import damask
import numpy as np
from optparse import OptionParser
scriptName = os.path.splitext(os.path.basename(__file__))[0]
scriptID = ' '.join([scriptName, damask.version])
# ----- Helper functions ----- #
def calcMises(what, tensor):
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"""Calculate von Mises equivalent"""
dev = tensor - np.trace(tensor)/3.0*np.eye(3)
symdev = 0.5*(dev+dev.T)
return math.sqrt(np.sum(symdev*symdev.T) *
{
'stress': 3.0/2.0,
'strain': 2.0/3.0,
}[what.lower()])
# --------------------------------------------------------------------
# MAIN
# --------------------------------------------------------------------
desp = "Add von Mises equivalent values for symmetric part of requested"
parser = OptionParser(option_class=damask.extendableOption,
usage='%prog options [file[s]]',
description=desp,
version=scriptID)
parser.add_option('-e', '--strain',
dest='strain',
metavar='string',
help='name of dataset containing strain tensors')
parser.add_option('-s', '--stress',
dest='stress',
metavar='string',
help='name of dataset containing stress tensors')
parser.set_defaults(strain=None, stress=None)
(options, filenames) = parser.parse_args()
# ----- Loop over input files ----- #
for name in filenames:
try:
h5f = damask.H5Table(name, new_file=False)
except:
continue
damask.util.report(scriptName, name)
# TODO:
# Could use some refactoring here
if options.stress is not None:
# extract stress tensor from HDF5
tnsr = h5f.get_data(options.stress)
# calculate von Mises equivalent row by row
vmStress = np.zeros(tnsr.shape[0])
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for ri in range(tnsr.shape[0]):
stressTnsr = tnsr[ri, :].reshape(3, 3)
vmStress[ri] = calcMises('stress', stressTnsr)
# compose label
label = "Mises{}".format(options.stress)
# prepare log info
cmd_log = scriptID + '\t' + ' '.join(sys.argv[1:])
# write data to HDF5 file
h5f.add_data(label, vmStress, cmd_log=cmd_log)
if options.strain is not None:
tnsr = h5f.get_data(options.strain)
vmStrain = np.zeros(tnsr.shape[0])
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for ri in range(tnsr.shape[0]):
strainTnsr = tnsr[ri, :].reshape(3, 3)
vmStrain[ri] = calcMises('strain', strainTnsr)
label = "Mises{}".format(options.strain)
cmd_log = scriptID + '\t' + ' '.join(sys.argv[1:])
h5f.add_data(label, vmStrain, cmd_log=cmd_log)