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Mechanical Testing of Composite Materials

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Inserts interfaced with Carbon Fiber Tube

Things to test

• Mechanical Tests

  • Tensile Test- needed for plug

    • How to test it

    • Probably not needed since the push rod will be under constant compression

  • Flexural Test

    • three-point and four-point bend testing according to ISO 14,125, ISO 178, ASTM D 790, and ASTM D 6272

    • parameters for this test are the support span, the speed of the loading, and the maximum deflection for the test

  • Impact Test

  • Compression Test

    • End loading

    • Sheer loading

    • ASTM D 695, ASTM D 3410, and ISO 14,126.

    • information on elastic limit, proportional limit, yield point, yield strength, and compressive strength

• Strength at high temperatures (Summer)

• Fatigue Failure?

Plug Testing

• Adhesive

• Adhesive thickness (Depends on Diameter of Insert)

• Adhesive depth (Depends on Length of Insert)

• Steel or Aluminum?

• Buy or Manufacture?

• CF prep styles

• Metal prep styles

• CF prep depth

• Length?

ASTM D 695 (compression test)

• What is being recorded: Used to find the modulus of elasticity, yield stress, deformation beyond the yield point, and compressive strength 

• Procedure: ASTM D695 Rigid Plastic Compression Testing

• Machinery Used: Can be performed on either a single-column or dual-column universal testing machine such as those available in Instron's 3400 and 6800 Series (ASTM D695 Compression Testing Rigid Plastics)

ASTM D 3410 

• What is being recorded: Used to measure the ultimate compressive strain, the compressive modulus of elasticity, Poisson’s ratio, and transition strain.

• Machine used: Standard Universal Testing Machine

• Procedure: ASTM D3410 Polymer Matrix Composite Shear Load Testing - ADMET (testing procedure tab)

ISO 14,126.

• What is being recorded: the compressive strength and compressive modulus of fiber-reinforced plastic composites in the in-plane direction, meaning the direction parallel to the plane of the laminate

• Machinery Used: ISO 14126 | ASTM D3410: Shear Loading Compression

• Procedure: In-Plane Compressive Properties of Fiber-Reinforced Plastic Composites

Inner Diameter of the Push rod - 0.437"

Inserts: has to be slightly smaller than the inner diameter

• Where to buy: 

  • McMaster - Carr (Current)

MSC Industries - MSC Industrial Supply Co. (mscdirect.com)