Stress Rupture Testing
The stress rupture test determines the tendencies of materials that
may break under an overload. It is used in the selection of materials
where dimensional tolerances are not critical, but rupture cannot be
tolerated. Stress rupture tests provide a measure of the ultimate load-carrying
ability of a material as a function of time.
The stress rupture equipment at LTI includes four fully-automated machines
that provide state-of-the-art computer control and monitoring. The machines
are designed to apply a static stress to a specimen at a specific temperature
for an extended period of time and are calibrated to ASTM standards.
Testing is performed at temperatures up to 2000 degrees Fahrenheit.
The requirements for temperature control of stress rupture tests is
±3 degrees Fahrenheit and are obtained from calibrated thermocouples
attached to the test bar.
The testing complies with ASTM standards E4, E8, E83, E139, E292, and
similar requirements. The stress testing systems also comply fully with
ISO 9000 compliance and data management.
A wide range of graphing and reporting options are available to meet
customer needs. Standard reports contain basic information for test
evaluation. Reports and graphs can be e-mailed or faxed to customers.
Smooth, notched, combination smooth & notched and flat specimens
can all be used for the testing. LTI’s machinists can prepare
all of these specimens to ASTM standards.