Stress concentration
Stress concentrations arise from local geometry changes and lead to increased mechanical stress, which causes fatigue cracks.
Physikalisch-chemischer Wirkmechanismus
Stress concentrations occur when mechanical load is strongly concentrated at a point. This often happens at holes, welds, or other geometric discontinuities in the material. The stress is locally increased, raising the mechanical loading of the material.
Metallurgical Relevance & Welding Risks
These elevated stresses can lead to fatigue cracks, especially when the material is subjected to repeated loading. Component life can be significantly shortened because stress concentrations impair the material's mechanical strength and toughness.
Werkstattpraxis & Handlungsanweisungen
To minimize stress concentrations, it is important to plan holes and welding procedures carefully. When welding, use a sufficiently large weld size and ensure even stress distribution. For holes, choose hole sizes and depths carefully to avoid stress concentrations.