ASTM D1002  Apparent Shear Strength of Single-Lap-Joint Adhesively Bonded Metal Specimens

ASTM D1002  Apparent Shear Strength of Single-Lap-Joint Adhesively Bonded Metal Specimens

The ASTM D1002 test method covers the determination of the apparent shear strengths of adhesives for bonding metals when tested on a standard single-lap-joint specimen and under specified conditions of preparation and test. The performance of specimens assessed by this method is quantified in terms of the SI units.

    Scope:

    The ASTM D1002 is a standard test method for apparent shear strength of single-lap-joint adhesively bonded metal specimens by tension loading (Metal-to-Metal). This is largely a  comparison test process. It can, however, be used as a discriminator to determine differences in adherend surface preparation conditions and adhesive environmental endurance. The test method has been used to determine the strength properties of tested systems by manipulating surface preparations, primers, and adhesive systems. This test can also be performed to compare and select adhesives or bonding methods for fatigue and environmental changes susceptibility. 

    Test Procedure :  

    For the ASTM D1002, the specimens are put in the testing machine’s grips so that the outer 25  mm of each end is in contact with the jaws and the long axis of the test specimen coincides with the direction of applied pull through the grip assembly’s centre line. After that, the specimen is loaded at a rate of 80 to 100 kg/cm2 of shear area per minute. The load is continued to fail. A free crosshead speed of 1.3 mm /min will be used to approximate this rate of loading. 

    Specimen Size :  

    Single-lap-joint adhesively bonded metal specimens are used in the ASTM D1002 test procedure. 

    Data :  

    According to the ASTM D1002, each test specimen’s load at failure, as well as the nature and extent of the failure, is noted. All failure loads are determined to the closest 0.06 cm2 in kilogrammes per square centimetre of shear area.

    Conclusion:

    ASTM D1002 test method covers the determination of shear strength of adhesives suggesting desirable changes to enhance their quality and performance. The results aid in enhancing their quality keeping in view the global standards.

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