Stress Relaxation

Relaxation, or stress relaxation, is a term used to describe the stress reduction of a material over time while it is held in tension. A material's relaxation is often measured during creep testing on a universal testing machine. When measuring relaxation, the motion of the crosshead is stopped, and the load cell continues to monitor forces to calculate the reduction in stress of the material. An alternate term is stress relaxation.

stress relaxation on a stress-strain curve


Related Content

3400 Series - Affordable Testing Solutions

Instron 3400 Series Universal Testing Systems for Tensile, Compression, Bend, and other material property tests.

6800 Series Premier Testing Systems Brochure

Instron 6800 Series Universal Testing Systems provide unparalleled accuracy and reliability. Built on a patent-pending Operator Protect system architecture with an all-new Smart-Close Air Kit and Collision Mitigation features, the 6800 Series makes materials testing simpler, smarter, and safer than ever before.

Bluehill Universal Brochure

Bluehill Universal Software is built from the ground-up for touch interaction and an intuitive user experience. Discover simpler and smarter testing with features such as pre-loaded test methods, QuickTest in seconds, enhanced data exporting: and Instron Connect – a new feature that provides a direct communication link to Service. Users of previous versions of software such as Bluehill 2 and Bluehill 3 can easily upgrade to the newest version of Bluehill.