Plastic Tensile Testing

The figure below from quadrant engineering plastic products shows the test geometry.

Plastic tensile testing.

Elongation at break the ratio between. Test types tensile strength the amount of force that can be applied to a plastic before it yields stretches irreparably or. Cut or injection mold your material into one of the five dumbbell shapes. Needs to be servo controlled to keep a constant rate of speed.

Tensile testing is commonly used and represents an integral input to quality control. Tensile strength the maximum amount of tensile stress that a material can withstand before failure through a. Elongation at yield the ratio between increased length and initial length at the yield point. Margaret johns sep 14 2017.

Achieving reliable results in tensile testing of plastics automotive and medical applications increasingly call for tighter tolerances requiring suppliers to perform their own testing. Astm d638 tensile testing of plastics 1. For this test plastic samples are either machined from stock shapes or injection molded. The test is conducted at tensile rates ranging from 1 to 500 mm min until the specimen fails yields or breaks.

Elongation the increase in gauge length after break. Tensile modulus how much a material can deform stretch in response to stress before it yields. How to perform a tensile test on plastics according to iso 527 2. The exact shape you use is.