Basic Indentation Analysis

This example analyses a FischerScope HDF5 file and plots each indentation curve.

from pathlib import Path

import matplotlib.pyplot as plt
import pandas as pd

import micromechanics
from micromechanics.indentation import Indentation, Tip

repository_root = Path(micromechanics.__file__).resolve().parents[1]
file_name = repository_root / "examples" / "FischerScope" / "N1_1.hdf5"

Define the tip and load the measurement file. The material Poisson ratio enters the conversion from reduced modulus to Young’s modulus.

tip = Tip()
indentation = Indentation(str(file_name), nuMat=0.5, tip=tip)
rows = []

Open hdf5-file: /home/runner/work/micromechanics/micromechanics/examples/FischerScope/N1_1.hdf5

Each iteration selects the next indentation test. analyse performs the Oliver-Pharr evaluation and stores the resulting values in metaUser.

for testname in indentation:
  indentation.analyse()
  plt.plot(indentation.h, indentation.p, label=testname)
  rows.append(indentation.metaUser.copy())

The force-depth plot gives a quick visual check for repeated measurements, while the dataframe collects the numerical metadata for inspection or export.

plt.xlabel("Depth / um")
plt.ylabel("Load / mN")
plt.legend()

df = pd.DataFrame(rows)
print(df)

/home/runner/work/micromechanics/micromechanics/docs/source/examples/plot_basic_indentation.py:43: UserWarning: No artists with labels found to put in legend.  Note that artists whose label start with an underscore are ignored when legend() is called with no argument.
  plt.legend()
                   measurementType               S_mN/um  ... segment     code
0   Fischer Scope Indentation HDF5   [14.35122316486651]  ...     [1]  main.py
1   Fischer Scope Indentation HDF5  [15.745680750614438]  ...     [1]  main.py
2   Fischer Scope Indentation HDF5   [15.90439805730888]  ...     [1]  main.py
3   Fischer Scope Indentation HDF5   [16.09010295147651]  ...     [1]  main.py
4   Fischer Scope Indentation HDF5  [15.759372606477493]  ...     [1]  main.py
5   Fischer Scope Indentation HDF5  [15.862357777910967]  ...     [1]  main.py
6   Fischer Scope Indentation HDF5  [15.871862721628293]  ...     [1]  main.py
7   Fischer Scope Indentation HDF5  [15.996196579279452]  ...     [1]  main.py
8   Fischer Scope Indentation HDF5   [15.24746967801729]  ...     [1]  main.py
9   Fischer Scope Indentation HDF5  [15.376666240263122]  ...     [1]  main.py
10  Fischer Scope Indentation HDF5   [16.09475997375254]  ...     [1]  main.py
11  Fischer Scope Indentation HDF5  [15.181851666496254]  ...     [1]  main.py
12  Fischer Scope Indentation HDF5  [15.703335447957938]  ...     [1]  main.py
13  Fischer Scope Indentation HDF5  [15.990322177801245]  ...     [1]  main.py
14  Fischer Scope Indentation HDF5  [16.191081893635452]  ...     [1]  main.py
15  Fischer Scope Indentation HDF5  [15.072117198490727]  ...     [1]  main.py

[16 rows x 11 columns]