Crack Tip Opening Displacement
The Crack Tip Opening Displacement is the distance between the crack faces at the original tip before unstable crack propagation. It provides a measure of the material's toughness and deformability.
Physikalisch-chemischer Wirkmechanismus
The Crack Tip Opening Displacement (COD) measures how far the cracks in a material can open before becoming unstable. This value depends on stress and the mechanical properties of the material.
Metallurgical Relevance & Welding Risks
A high COD indicates low toughness and increases the risk of cracking and deformation. Poor welding procedures or excessive stress can raise the COD, making the material dangerous.
Werkstattpraxis & Handlungsanweisungen
To ensure a low COD, pay attention to correct welding parameters such as temperature and stress. Use suitable filler materials and regularly inspect components for cracks. If suspected, conduct a detailed examination.