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Stress Relaxation Testing

Elastomers, polymers and foams made from these materials often exhibit viscoelasticity — a time-dependent response to an applied load or displacement.  These tests typically involve applying a displacement to a specimen and monitoring how the force required to maintain the displacement decays over time. These tests are similar to creep tests in which a constant force or stress is applied to a specimen and elongation is monitored over time. Although the mechanisms responsible for creep are different than those responsible for stress relaxation, both kinds of tests are conducted slowly, typically over a period of hours or days, on electromechanical test systems.

MTS offers unparalleled expertise and technology to help test labs perform highly accurate and repeatable stress relaxation tests. That includes reliable load frames that are specifically designed to ensure precise application of force and motion over very long periods of time. We also provide user-friendly software that promotes simple test setup, execution and analysis of results.The MTS stress relaxation offering includes:

Flexible, user-friendly software for efficient test design and modification
Tabletop and floor-standing electromechanical load frames for a range of force 
   requirements
A broad selection of grips and fixtures for testing a wide variety of material types and
   sizes
Insight, Universal Test System, Monotonic, Test, Tension, Compression, Flex, Bend, Load Frame, Electromechanical

Universal Test Systems

The MTS Criterion® and MTS Exceed® families combine high-performance electromechanical and static-hydraulic load frame technology, easy-to-use MTS TestSuite™ TW software, and a full complement of test accessories to address a full spectrum of monotonic testing demands.


testsuite; software; multipurpose; mp; mpe; elite

MTS TestSuite™ Multipurpose Software

A modular and extremely powerful software platform for creating tests, running tests, generating reports and analyzing post-test data.