Stress Amplitude
Stress amplitude is the maximum deviation of stress from the mean value during a load cycle. It indicates how much the stress deviates from its average value.
Physicochemical Mechanism of Action
Stress amplitude describes the maximum difference between the highest and lowest stress values in a load cycle. It is a measure of the stress variation over time.
Metallurgical Relevance & Welding Risks
High stress amplitude can lead to increased mechanical loading, affecting the material's structure. In non-current load cycles, it can cause stress buildup and potential cracking. Conversely, too low stress amplitude may not provide enough mechanical loading to achieve certain metallurgical effects.
Workshop Practice & Procedures
When performing fatigue testing, measure and control the stress amplitude precisely. A typical stress amplitude is about 10% of the maximum load value. For special materials or applications, this value may vary, so it's important to follow specific requirements.