Plastic Tensile Strength Test

The test is conducted at tensile rates ranging from 1 to 500 mm min until the specimen fails yields or breaks.

Plastic tensile strength test.

Astm d638 is one of the most common plastic strength specifications and covers the tensile properties of unreinforced and reinforced plastics. Tensile testing is a destructive test process that provides information about the tensile strength yield strength and ductility of the metallic material. The test measures the force as a function of the strain being applied to the plastic sample. Iso 527 2 is performed on a universal testing machine by applying a tensile force to a sample specimen and measuring various properties of the specimen material under stress.

For this test plastic samples are either machined from stock shapes or injection molded. This test method uses standard dumbell or dogbone shaped specimens under 14mm of thickness. A tensile test is typically governed via standards and the two most common in the plastics industry are astm d638 and iso 527. This includes astm d638 technically equivalent to iso 527 1 is a testing standard which ascertains the tensile properties of a plastic material.

The figure below from quadrant engineering plastic products shows the test geometry. In addition the wintest software includes all applicable calculations like yield stress strain e modulus uts etc. A universal testing machine tensile testing machine is needed to perform this test. Separate tensile test methods are commonly applied to polymer films astm d882 or iso 1184 and elastomers astm d412 or iso 37.

A wide variety of grips are available for tensile testing of plastics. It measures the force required to break a composite or plastic specimen and the extent to which the specimen stretches or elongates to that breaking point. The tensile testing machine pulls the sample from both ends and measures the force required to pull the specimen apart and how much the sample stretches before breaking. The test method can be used for testing materials up to 14mm 0 55 in and the material should be in the shape of a dumbbell or dog bone.

These include several types of self tightening manual hydraulic and pneumatic versions that are necessary for positive gripping. The most common way to measure the yield strength of plastics is with a tensile test.