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ASTM Standard D 897 (Reference 1) is an old test method (first published in 1949), originally developed for the determination of the tensile properties of metal-to-metal adhesive bonds. It was intended primarily as a comparative test. Its use has now been extended to other adherends also, including composite materials. The tensile grips are shown in the following photograph. The grips are threaded directly into self-aligning fittings in the base and crosshead of the testing machine. The test adherends are 1.129” in diameter (to result in a bond area of 1 square inch, thus simplifying calculations), with 1 7/8” diameter, ¼” thick collars that slide into the side cutouts in the grips. The breaking load is recorded, being the tensile strength of the adhesive bond.
Tensile Grips – ASTM D 897 Source of Additional Information: 1)
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