The fatigue test is a kind of reliability test. It uses rubber, plastic samples or simulated parts to measure the fatigue performance criterion under various environments, and studies the fracture process.

Fatigue testing is one of the structural tests to study and verify the fatigue and fracture properties of aircraft structures or components. Fatigue damage is the main form of early failure of mechanical parts. The main purpose of fatigue research is to accurately estimate the fatigue life of parts with material structure to ensure that parts will not fatigue failure during service.

Fatigue damage is the main form of early failure of mechanical parts. The main purpose of fatigue research is to accurately estimate the fatigue life of parts of material structure to ensure that parts will not fatigue failure during service. It includes fatigue under symmetrical stress, fatigue under asymmetric cyclic stress, strain fatigue (low cycle fatigue), fatigue crack growth rate, thermal fatigue test, corrosion fatigue test, contact fatigue test, high temperature fatigue test, low temperature fatigue test. .

examination range

1. Test stress (strain) and life (cycle cycle): high cycle fatigue low cycle fatigue room temperature fatigue low temperature fatigue high temperature fatigue thermal fatigue test environment corrosion fatigue contact fatigue fretting wear fatigue and so on;

2. Loading method: tensile fatigue fatigue bending fatigue (rotating bending fatigue, three-point bending fatigue, four-point bending fatigue, cantilever bending fatigue) twisting fatigue, composite stress fatigue, etc.

3. Test method: expansion rate test S-N curve measurement Rotational bending method, etc.;

Recommendation

EN 12663.1-2010 Railway applications - Structural requirements for railway vehicle bodies - Part 1 - Selection methods for locomotives and railway passenger vehicles and railway freight vehicles

IEC 61373-2010, UIC566-1990, GB/T2843-2015