ASTMD

Python code to do the computations for ASTM D series standards
import ASTMD

See example.py which computes the results files from Sample_Data.txt

includes the following standards :

ASTM D790 : Standard Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Material

Material = ASTMD.D790(filenames, widths, depths, span, mtr_name="", largespan=False, validate_modulus=False)

filenames : List of paths to the test data files
widths : List of the samples widths
depths : List of the samples depths (thickness)
span : Span used to test the material
mtr_name : String for the material name (optional)
largespan : True if the test were done using the largespan procedure
validate_modulus : if True Adds a plot of all the modulus lines to visualise the data\

• Computes the flexural stress and strain with equations in ASTM D790
• Finds average flexural stress for all samples
• Finds average tangent modulus
• Plots the stress-strain curve
• Plots the modulus line
• Returns a result_D790.txt file in the same directory as the test data

ASTM D3039 : Standard Test Method for Tensile Properties of Polymer Matrix Composite Materials

Material = ASTMD.D3039(filenames, widths, thicknesses, lengths, mtr_name="", extensiometer_length=50.8, validate_modulus=False)

filenames : List of paths to the test data files
widths : List of the samples widths
thicknesses : List of the samples thicknesses
lenths : List of the samples lengths
mtr_name : String for the material name (optional)
extensiometer_length : Length of the extensiometer used to measure deformation
validate_modulus : if True Adds a plot of all the modulus lines to visualise the data\

• Computes the tensile stress and strain with equations in ASTM D3039
• Finds average tensile strenght
• Finds average chord modulus from data points at strain = 0.001 and strain = 0.002 as per ASTM D3039 standard
• Plots the stress-strain curve
• Plots the modulus line
• Returns a result_D3039.txt file in the same directory as the test data

ASTM D5868 : Test Method for Lap Shear Adhesion for Fiber Reinforced Plastic (FRP) Bonding

Material = ASTMD.D5868(filenames, areas, mtr_name="")

filenames : List of paths to the test data files
areas : List of the samples areas
mtr_name : String for the material name (optional)\

1. Computes the shear stress at the bonded joint
2. Finds the average shear strength
3. Plots the stress-time curve (just to show the data)
4. Returns a result_D5868.txt file in the same directory as the test data