ASTM E8 Tension Testing Metallic Materials - Shouldered End Specimens
When tensile testing metals to ASTM E8, EN 10002-1 or ISO 6892, it is often necessary to test machined specimens. One common type of machined specimen is the shouldered end specimen. Sometimes referred to as a "Dumbbell", "Dogbone" or "Button End" specimen, this round specimen type has shouldered ends that are used for gripping the specimen during testing.
Most recently we were asked to provide a testing system that could be used for tensile testing of 0.505-inch diameter shouldered end specimens. Since the maximum load requirement was nearly 40,000 lbf, we decided to supply our Industrial Series 300LX load frame with split sleeve shouldered end specimen holders and our newly developed Universal Spherical Tension Adapters (USTA).
The single test space and dual acting actuator of the 300LX make it easy for operators to install the specimens. The split sleeve shouldered end specimen holders allow for very quick changing of test specimens. They also retain the ends of the broken specimen during failure providing for additional operator safety. The USTA assemblies allow for the specimen to self-align during loading, easily meeting the alignment requirements of ASTM E8, EN 10002-1 and ISO 6892.
For accurately measuring strain, we supplied a 2630 style clip-on extensometer with a 2-inch gauge length. Bluehill materials testing software provided all the necessary control parameters and calculation algorithms to satisfy the forementioned test standards and offered simple test setup and efficient testing operations.
The 2630-100 series of extensometers offers speed of attachment and ease-of-use. The light-weight, rugged cross-brace design eliminates errors caused by physical distortion, while built-in protection ensures that damage is not caused by over-extension. The low operating-force arms of the extensometer reduce the possibility of knife-edge slippage when testing hard or smooth surfaced materials.
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Featuring a large, single test space and single footprint, LX Models are designed for high-capacity tension, compression, bend/flex, and shear testing.
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