How to use MatAn?

There is also an presentation in our repo This tutorial need to be updated! This is almost autogenerated with unitex package

Set up of Sample Class

imports

import os
import matan as mt
import numpy as np
import pandas as pd

sample_name = "FDM-20pPET-10prPET"
sample = mt.sample(sample_name)

Adding tensile test to sample

sample.tensile.add(1)

You can also separately use tensile test class, and later just append the tensile_tests object into your sample class by simple using add() method:

material_group = "pOlymers"
standard = "ISO527"
tensile_test = mt.tensile.test()
tensile_test.define(material_group, standard)
sample.add(tensile_test)

Tensile_Test class

SetUp

name = "FDM-20pPET-10prPET"
material_group = "PoLyMeRs"
standard = "iSo527"
tensile_test = mt.tensile.tests(name)

tensile_test.define(material_group=material_group, standard=standard)
tensile_test.add(2)

Read data from the csv

raw_csv_path = os.path.join(*results_path, "METHOD1-10pXXX.raw.csv")
raw_df = pd.read_csv(raw_csv_path, skiprows=4)

init_values = pd.read_csv(
    raw_csv_path, skiprows=0, names=["name", "value", "unit"]
)[0:4]

init_length_obj = init_values.values[3][1].split(" ")
init_length = int(init_length_obj[0])
init_force_obj = init_values.values[0][1].split(" ")
init_force = float(init_force_obj[0])

Set Engineering Tensile

Now you can set the engineering data obtained from Tensile Test 

print("Engineering values")
tt_obj = tensile_test.results[0]
tt_obj.engineering_values.calculate(
    elongation_array=raw_df["Elongation"],
    elongation_units="mm",
    force_array=raw_df[raw_df.keys()[1]],
    force_units="N",
    initial_length=init_length,
    width=final_df["b"].loc[0].mean(),
    height=final_df["h"].loc[0].mean(),
    initial_stress=0.1,
)

Calculating Real Tensile values

obj = tensile_test.results[0].real_values
real_values = raw_df["Real stress"]
print("Recalculating from eng to real")
obj.calculate()

Setting Real Tensile

df = raw_df
obj = tensile_test.results[0].real_values
strain = df["Elongation"].apply(lambda elon: elon / init_length)

obj.set(df["Real stress"], "MPa", strain, "mm/mm")
"""
Too small size of strain group, thus, there is a problem with Young's modulus calculations
"""
obj.calculate_parameters()