Stress Relaxation Tester

Stress Relaxation Tester
A specialized testing instrument designed to measure the stress relaxation behavior of materials—quantifying how a material’s internal stress decreases over time when subjected to a constant deformation. This property is critical for assessing long-term performance in applications where materials remain under sustained strain (e.g., gaskets, seals, or structural components), as relaxation can lead to loosening, leakage, or failure.

 

Equipped with precision clamps to maintain constant deformation, high-sensitivity load cells, and optional temperature/humidity controls, the tester operates by:

 

  • Stretching, compressing, or bending a sample to a fixed deformation (e.g., 10–50% elongation or compression).
  • Holding this deformation constant over an extended period (minutes to months) while monitoring the decreasing stress.
  • Calculating stress relaxation rate and residual stress, which indicate how well the material retains its load-bearing capacity over time.

 

Key applications across materials and industries:

 

  • Rubber & Elastomers: Seals, O-rings, and gaskets in automotive engines, plumbing systems, or industrial machinery (where sustained compression can cause relaxation).
  • Polymers & Plastics: Flexible components like cable insulators, medical tubing, and packaging materials requiring long-term elasticity.
  • Metals & Alloys: Fasteners, springs, and structural parts in aerospace or construction (where creep and relaxation under constant strain impact safety).
  • Composites: Reinforced materials in bridges, wind turbine blades, and sports equipment (assessing long-term structural integrity).

 

Compliant with international standards such as ASTM E328 (metals), ASTM D638 (plastics), and ISO 3384 (rubber), this tester is trusted by material manufacturers, R&D labs, and quality control teams. It provides data to predict material performance over time, optimize designs for long-term use, and ensure compliance with safety standards for critical applications.
  • High-temperature Compression Stress Relaxation Tester

    High-temperature Compression Stress Relaxation Tester

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