Materials Testing Summer 2019

Owned by Former user (Deleted)
Last updated: Jul 22, 2019 by Hamza Abuabah

Members:

Hamza Abuabah

Michael Zhang (Unlicensed)

Former user (Deleted)

Shalin Patel

Micah Bai

Micah Bai (Unlicensed)

References:

Composites Testing


Information Obtained from Tests

The tests will be done in two stages. The first stage will be to identify the ideal manufacturing method. This will depend on the mold, the quality of the vacuum bagging, temperature controls, handling, preparation method, and the environment. Multiple molds and bagging configurations can be tried, as well as trying different ways to heat the composite (toaster oven vs conventional oven? who will win?). The first stage tests and second stage tests can use the same samples, but only the data from the manufacturing method chosen should be used in ANSYS and design calculations. The first stage tests will be used to judge which manufacturing method to use by the following metrics, ranked by importance:

  1. Void Content test
    • Void volume percentage: Good composites should have a void content <1%. Composites with high void percentages may have unpredictable transverse properties.
  2. Surface quality (visual inspection)
    • No number, just rank manufacturing methods from best surface quality to worst

As seen in the 'Composites Testing' page referenced above, there are many variables that will be needed in order to accurately simulate composite materials in ANSYS ACP. The second stage will be to determine the needed data with the following tests:

  • Density Measurement
    • Density
  • Thermal Expansion Test (for carbon fiber rims)
    • Coefficient of Thermal Expansion in longitudinal direction
    • Coefficient of Thermal Expansion in transverse direction
  • Tensile Tests (tests may be separate or combined, depends on calibration of machine)
    • Tensile Strain testing
      • Young's modulus in the longitudinal direction
      • Young's modulus in the transverse direction
    • Tensile Destruction testing
      • Tensile stress limit in longitudinal direction
      • Tensile stress limit in transverse direction
      • Tensile strain limit in longitudinal direction
      • Tensile strain limit in transverse direction
      • Poisson's ratios
  • Compression Destructive test
    • Compressive stress limit in longitudinal direction
    • Compressive stress limit in traverse direction
    • Compressive strain limit in longitudinal direction
    • Compressive strain limit in transverse direction
  • Uncategorized
    • Shear properties

Testing Schedule:

  • Tensile Testing ASTM D3039: Starts as soon as we get pre preg JULY 19 (hahahahahahahaha)
  • Compressive Testing ASTM D3410: After Tensile
  • Shear Testing: 

Notes on Testing:

  • Must test different manufacturing methods
  • Someone who is in School should book off machines from the materials testing lab
  • We have to test at least 2-3 of the same layups for each tests, to maintain repeatability

Manufacturing Methods

Toaster oven, walmart bags, and a little bit of creativity

Test Setup

two people and a thirst for revenge in a tug of war

Data