ASTM D897 Test Method for Tensile Properties of Adhesive Bonds

The standard method ASTM D897 describes comparative tensile property testing of metal to metal adhesive bonds using circ ular disc type butt-jointed specimens under specified pretreatment and test conditions. The ASTM D897 test is intended mainly to compare different adhesives. The adhesive shear strength is expressed in megapascals. Read more about ASTM D897 Test Method for Tensile Properties of Adhesive Bonds below.... Read More

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    ASTM D897 Test Method for Tensile Properties of Adhesive Bonds Scope:

    The standard method ASTM D897 describes comparative tensile property testing of metal to metal adhesive bonds using standard shape specimens at specified pretreatment and test conditions. The test is intended mainly to compare different adhesives, though variations in adherend surface preparation or environmental durability can also be evaluated. Data from the test can be used for strength testing and quality control of adhesive and adherend systems including surface preparation, adhesive application and, curing. Tensile shear strength test involves subjecting circular butt-jointed specimens to opposing tensile forces. The metal specimens are required to comply with the relevant ASTM standards for ferrous and non-ferrous metals as specified in section 6.1 of ASTM D897. The testing apparatus should be capable of a force measurement accuracy of ±1% and must have a movable member and a fixed member to hold the grips. A recommended design for the grips is provided in Figure 1 of ASTM D897. The test specimen is held in the grips, between the fixed and movable members.

    Procedure:

    Ten specimens with dimensions described in Figure 2 of ASTM D897 are prepared after proper surface preparation, adhesive application, and curing as per the manufacturer’s instructions. Each specimen comprises two circular disks bonded together at their flat faces. Each specimen is then placed into the circular grips and force is applied through the centreline. The maximum load at failure is recorded.

    Video 01: Measuring the adhesive tensile strength value

    Specimen size:

    Various required dimensions of the circular discs are provided in Figure 2 of ASTM D897.

    Result:

    The ASTM D897 adhesive shear strength is reported in megapascals. 

    Conclusion:

    The standard method ASTM D897 describes comparative tensile property testing of metal to metal adhesive bonds using standard shape specimens at specified pretreatment and test conditions.

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