Plastic Tensile Testing

How to perform a tensile test on plastics according to iso 527 2.

Plastic tensile testing.

Elongation at yield the ratio between increased length and initial length at the yield point. Tensile modulus how much a material can deform stretch in response to stress before it yields. 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. The figure below from quadrant engineering plastic products shows the test geometry.

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. The exact shape you use is. Elongation the increase in gauge length after break.

For this test plastic samples are either machined from stock shapes or injection molded. Elongation at break the ratio between. The test is conducted at tensile rates ranging from 1 to 500 mm min until the specimen fails yields or breaks. Test types tensile strength the amount of force that can be applied to a plastic before it yields stretches irreparably or.

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