Fatigue Testing Laboratories & Methods
Fatigue testing applies repeated or fluctuating load to a specimen or component to characterise life under cyclic stress, typically to build an S-N curve or demonstrate a required life.
What does it measure?
- Cycles to failure
- Fatigue strength at a given life
- Endurance behaviour
- Crack initiation and growth (with fracture methods)
When is it used?
- Durability substantiation for rotating or vibrating parts
- Weld and joint qualification
- Design allowables for cyclically loaded structures
- Explaining a service failure with cyclic loading history
Sample considerations
- Load ratio, waveform, frequency and run-out limit must be defined before testing.
- Surface finish and residual stress strongly influence fatigue life; specimen preparation should be recorded.
- Fatigue programmes need multiple specimens per stress level for meaningful statistics.
Laboratories with relevant capabilities
- Composite Test & Evaluation Ltd (Honiton, Devon) — Composites Testing, Mechanical Testing, Fatigue Testing
- Westmoreland Mechanical Testing & Research Ltd (Banbury, Oxfordshire) — Mechanical Testing, Fatigue Testing, Fracture Testing
- Touchstone Research Laboratory (WV) — Ceramics Testing, Mechanical Testing, Composites Testing
- Laboratory Testing Inc. (Hatfield, PA) — Materials Testing, Mechanical Testing, Chemical Analysis
- Westmoreland Mechanical Testing & Research (Youngstown, PA) — Mechanical Testing, Materials Testing, Fatigue & Fracture
- Touchstone Testing Lab (Triadelphia, WV) — Mechanical Testing, Fatigue & Fracture, Materials Testing
Frequently asked questions
- How many specimens does a fatigue programme need?
- It depends on the objective. A single life demonstration may need few specimens, while an S-N curve normally requires several specimens at each of multiple stress levels.
- Can fatigue testing be done on a finished component?
- Yes. Component fatigue testing needs a fixture that reproduces the service load path, so share drawings and load cases with your request.
Confirm standard edition, jurisdiction and actual laboratory scope. Service references are not partnerships or endorsements.