Plastic Tensile Test Specimen Dimensions

Versible deformation is called elastic deforma tion.

Plastic tensile test specimen dimensions.

Though astm d638 measures many different tensile properties the following are the. The deformation of a rubber band is en. When the tension test is started and specimen a or specimen b is pulled the strain is uniform along the gauge length up to the point at which the maximum force is reached and the onset of necking occurs. This test method uses standard dumbell or dogbone shaped specimens under 14mm of thickness.

The plastic dog bones are typically molded in a die to produce test specimens depending on the specific requirements of the applicable tensile testing standards. Specimens for astm d638 are dumbbell shaped with either a 25 mm or 50 mm gauge length. Flat dog bone specimens can also be die cut from a plastic sheet or machined from a block. D618 practice for conditioning plastics for testing.

While it provides similar results to astm d638 iso 527 2 is not considered technically equivalent due to differences in specimen size and test requirements while some large multinational manufacturers test to both astm d638 and iso 527 2 most of our customers demonstrate a. The main principle of the tensile test is denotes the resistance of a material to a tensile load applied axially to a specimen. Specimen diameter 12 5 mm. Astm d638 is one of the most common plastic strength specifications and covers the tensile properties of unreinforced and reinforced plastics.

A dog bone or dumbbell specimen is used to tensile test plastic materials per astm d638. Specimen a gauge length specimen b gauge length. D882 test method for tensile properties of thin plastic sheeting. D651 test method for test for tensile strength of molded electrical insulating materials.

D883 terminology relating to plastics. It is very important to the tensile test to be considered is the standard dimensions and profiles are adhered to. The stretch in each material is uniform up to this point. D412 test methods for vulcanized rubber and thermoplastic elastomers tension.

Astm d638 is performed by applying a tensile force to a sample specimen and measuring various properties of the specimen under stress. A universal testing machine tensile testing machine is needed to perform this test. Iso 527 2 is an international standard for determining the tensile properties of reinforced and non reinforced plastics. A 50 mm gauge length is recommended.

Tensile test purpose graph results specimen detail. 4 a load elongation curve from a tensile test and b corresponding engineering stress strain curve. Gauge length changes with astm e83 class b 2 accuracy. D882 test method for tensile properties of thin plastic sheeting d883 terminology relating to plastics d1822 test method for tensile impact energy to break plastics and electrical insulating materials d3039 d3039m test method for tensile properties of poly mer matrix composite materials d4000 classification system for specifying plastic materi als.

4 tensile testing second edition fig.