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Force versus crosshead displacement, force versus deflection data continuously, or at frequent intervals (around 2-3 recordings per second, with a target minimum of 100 recorded data points)

If there are any initial failures, record force, displacement and mode of damage where the failure occurs. 

Record mode, area and location of each failure. 

Use the failure identification codes, shown in the figure below.

Record the max force, failure force, head displacement and the deflection at the moment of ultimate failure. 

For ultimate failure modes, record the mode, area and location of ultimate failure for each material. 

Calculations:

• For 3-Point Mid-Span Loading:

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• For 4-Point, Quarter-point loading:

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• For 4-Point (Third Point) Loading:

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Test at least 5 specimens

Test at least five specimens per test condition

Same as ASTM D3039 standard along with the following:

Will conform to the following geometry:

At least 20 specimens shall be tested, representing at least four different joints

Use these dimensions if you can:

Test 10 test specimens for each adhesive

Prepare a minimum of 5 lap shear samples in each case and test.

See figure 1 below for the recommended geometry of the lap shear samples