ThermCoeff - Thermoelastic coefficent evaluation

Thermoelastic coefficent evaluation for Thermoelastic Stress Analysis (TSA)

Simple examples

Here is a simple example on how to use the code:

pip install ThermCoeff

Import packages:

import numpy as np
import pysfmov as sfmov
import ThermCoeff

Thermoelastic coefficient of standard materials is available as:

s = 'steel'                         # Steel material is chosen
km = ThermCoeff.from_material(s)    # Thermoelastic coefficient of steel is obtained

The following materials are available: aluminium, epoxy, glass, magnesium, steel, titanium

If strain gauge calibration is performed and the strain is acquired externally during the experiment:

# Uniaxial strain-gauge
eps = np.random.rand(1000)              # Simulated strain from strain-gauge
strain = ThermCoeff.get_strain(eps)     # Obtain strain

# Strain-gauge rosette
eps = np.random.rand(1000, 3)                           # Simulated strain from rosette
configuration = '90'                                    # Angular configuration of the rosette
strain = ThermCoeff.get_strain(eps, configuration)      # Obtain strain

Once the strain is obtained (or already known):

filename = './data/rec.sfmov'   # Path to the thermal video
data = sfmov.get_data(filename) # Load the data
fs = 400                        # Sampling frequency [Hz]
fl = 40                         # Load frequency [Hz]
location = 56, 38, 30, 70       # Location of the strain-gauge on the camera field of view

E = 75 * 10**9                  # Young Modulus [Pa]
ni = 0.33                       # Poisson's ratio

km = ThermCoeff.from_strain_gauge(data, fs, fl, E, ni, strain, location)

Reference: <https://www.sciencedirect.com/science/article/pii/S0142112320301924>