Report on the testing of tensile strength

Owned by Maciek Pajak (Deactivated)
Last updated: Mar 04, 2021
2 min read

ASTM D3039_Standard Test Methods for Tensile Properties , will put this in the right place just going to have it here for now.

Abstract/Summary

 

This section will include the following (and maybe some other stuff I missed?)

  • Highlight of results

  • What test we are doing (tensile, compression anvil pendulum etc.)

  • Some more specific information we missed, for example, we used our own equipment, we didn’t have the correct equipment so we had to choose something else, something that may have messed up our test results? (feel free to add other things you believe are important to note)

  • Lack of test specimens for the standard quantity that standards require?

  • Link to ASTM Standard summary?

 

Introduction

 

This test includes evaluating the tensile stress and strain of our carbon fibre sandwich constructions by means of a tensile test. We will use the results and compare them with FEA data to see if our manufacturing conforms to simulations. The failure modes we expect will occur include (let's talk about this because idk what the exact names of some of them would be, I can just picture them in my mind).

Materials

 

Equipment required

  • Extensometer

  • Strain Gauge

  • Strain-Indicating Device

 

Procedures

 

 *insert picture of our tensile tester*

 

 

Test Specimen Prep

 

We will fill this out if we actually do any specimen preparation such as conditioning or if our dimensions aren’t standard.

 

Raw Data

 

  • Results obtained directly from the test

Specimen Number

Ultimate Tensile Strain (MPa)

Ultimate Tensile Strength (MPa)

Specimen Number

Ultimate Tensile Strain (MPa)

Ultimate Tensile Strength (MPa)

 1

 

 

 2

 

 

3

 

 

4

 

 

5

 

 

*graph of stress-strain here*

Figure 1: Stress-Strain Curve

*Name and description of why failure mode occurred*

*picture of failure mode in question*

 

 

 

Processed Data

 

Preliminary calculations

 

Variable

Quantity

Notes

Variable

Quantity

Notes

 Strain Rate

 To be determined

 

 Specimen Thickness

 To be determined

 Averaged Measurement in 3 places

End Tab Length

To be determined

Use this Equation

 

Specimen Number

Thickness

Specimen Number

Thickness

 1

 

 2

 

3

 

4

 

5

 

 

Post-testing calculations

 

*samples calculations!!*

Specimen Number

Tensile Chord Modulus of Elasticity (MPa)

Poisson’s ratio

Transition Strain (MPa)

Specimen Number

Tensile Chord Modulus of Elasticity (MPa)

Poisson’s ratio

Transition Strain (MPa)

 1

 

 

 

 2

 

 

 

3

 

 

 

4

 

 

 

5

 

 

 

 

 

  • Graphs below this with a description of what the graph is showing

 

Discussion

 

Here, we can just explain what went/think went wrong and how we could’ve maybe avoided it if anybody wants to read this for future reference?

 

 

Conclusion

 

  • Here, we can include our final remarks and what we learned while going through this test

  • Validity of results

  • Conclusions

  • Implications

  • Some Highlight of Results (quantitative statements)

  • Trends

  • More stuff that I can’t think of?