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Tommy Tran

Maciek Pajak (Deactivated)

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titleEquipment and Apparatus:

  •  Equipment: ball-interfaced and anvil interface micrometer, deflectometer, conditioning chamber, environmental test chamber are recommended but not required.

  • Apparatus: The machine will have a stationary and movable head, the machine should be able to indicate the total force being carried by the test specimen, it will either be a 3- or 4-point bend test. Below is what they used

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titleProcedure:

  • Test at least five specimens.

  • Condition the specimen in a chamber if the test environment is not the same as a conditioned environment.

  •   Measure the length, width and thickness at three places in the specimen.

  • Place the specimeninto the test fixture and align the fixture so the longitudinal axis of the specimen is perpendicular (within 1 degree) to the longitudinal axes of the loading bars, the bars must also be parallel (within 1 degree) to the plane of the specimen facings.

  •  Attach the deflection transducer.

  • Apply a compressive force to the specimen until failure or until a deflection equal to the thickness is reached.

  • It was noted that the speed of testing should be around 6mm/min. 

  • Failure should occur at 3-6 minutes.

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titleEquipment and Apparatus:

  • Equipment required:

    • Micrometers/calipers

    • Strain-Indicating Device

    • Bonded Resistance Strain Gauges

    • Emery cloth

    • Special Alignment Jig (pictured below)

  • Compression Testing Fixture(pictured below are schematics and the actual fixture)

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  • Apparatus:

    • There will be a force indicator

    • The machine will have two loading heads. 

^^^I don’t exactly know what this means (interpret pls)

  • The drive mechanism will be able to give a controlled displacement rate with respect to the stationary head. 

  • If the atmosphere conditions suck use a conditioning chamber and an environmental test chamber.

  • If the material is super stiff use an extensometer. 

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titleEquipment and Apparatus:

  • Same as the above standard.ASTM D3039

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titleProcedure:

  • Test at least five specimens per test condition

  • Same as the above standard ASTM D3039 as well as:

    • This test will have normal strain instrumentation in both the longitudinal and transverse directions. It will also have a continuous/nearly continuous force normal strain data recording. 

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titleBasic Description:

  • Same as the above standardASTM D3039.

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titleReported during test:

  • Calculations:

    • Max shear stress/shear stress

    • Shear strain/max shear strain

    • Shear modulus of Elasticity

    • Offset Shear Strength

    • Various statistics


*Again, all these formulas will be in the confluence page*

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