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Please note that although each standard says to test 5 specimens each, we don’t exactly may not have 15 10 specimens we may use for testing the front bulkhead so we will have to do 3/4 instead of 5.

ASTM C393

Test Specimen Requirements

• Length x Width x Depth - 200 mm x 75 mm x Thickness of Sandwich Construction

• Make sure to test at least five specimens per test condition.

Equipment Needed:

• Micrometers and/or callipers

• Deflectometer/Deflection gages (ONLY if the UTM can’t measure the displacement)

• Conditioning Chamber

• Environmental Testing Chamber

• 3-point bend fixture

• UTM

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ASTM D3039

Test Specimen Requirements

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• Test at least 5 specimens

Equipment Needed:

• 3 Force Indicator

• Grips

• Strain Indicating Device

• Extensometer

• Strain Gauge

• Tabs( We should probably fabricate our own tabs)

• UTM

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ASTM D3410

Equipment Required:

• Compression fixture

• Strain-indicating device

• Special alignment jig

• Bonded Resistance Strain Gauges

• Emery cloth

• I believe UTM

• Conditioning chamber

• Environmental test chamber

• Extensometer

 Procedures:

• Condition specimens

• Apply strain gages/extensometers to both faces of the specimen(if we choose to).

• Monitor test temperature using thermocouples (if we choose to).

• If needed, move the testing machine crosshead to open the distance between the 2 housing blocks so both the upper and lower wedge rip assemblies may be accessed. 

• Close the upper grips manually to check the specimen's vertical displacement. Do it with the lower grips as well. The upper grips should be in full contact with the wedge when closed. Repeat if we need to. 

• Attach strain transducers if they will be used. Then, attach the strain recording instrumentation to the strain gages or other transducers on the specimen. Then, remove any remaining preload and zero the transducer(s).

• Apply the force to the fixture at the specified rate until failure while recording data.