Plastic Tensile Testing

How to perform an astm d638 plastic tensile strength test test procedure.

Plastic tensile testing.

Achieving reliable results in tensile testing of plastics automotive and medical applications increasingly call for tighter tolerances requiring suppliers to perform their own testing. Margaret johns sep 14 2017. Elongation the increase in gauge length after break. 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. Tensile testing is commonly used and represents an integral input to quality control. The exact shape you use is. The test is conducted at tensile rates ranging from 1 to 500 mm min until the specimen fails yields or breaks.

Needs to be servo controlled to keep a constant rate of speed. Astm d638 tensile testing of plastics 1. Cut or injection mold your material into one of the five dumbbell shapes. Separate tensile test methods are commonly applied to polymer films astm d882 or iso 1184 and elastomers astm d412 or iso 37.

For this test plastic samples are either machined from stock shapes or injection molded. How to perform a tensile test on plastics according to iso 527 2. 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. Tensile modulus how much a material can deform stretch in response to stress before it yields.