Elastic-Plastic Fracture Mechanics
Elastic-plastic fracture mechanics describes the behavior of materials under stress where plastic deformation occurs. It helps in analyzing and predicting cracks in components.
Physicochemical mechanism of action
Elastic-plastic fracture mechanics examines stress states and deformations in materials, especially under plastic deformation. It takes into account not only elastic behavior (return to original shape after load removal) but also plastic behavior (permanent deformation).
Metallurgical relevance & risks when welding
This theory is crucial for the safety and service life of components under mechanical load. Incorrect welding parameters or inadequate material selection can lead to plastic deformation, which can cause cracks and failure of components.
Workshop practice & instructions
In practice, this means that when selecting materials and welding processes, elastic-plastic fracture mechanics must be considered. This includes setting appropriate stress limits and monitoring the degree of plastic deformation. For steel components, it is important to design the welding process so that excessive plastic deformation does not occur, to prevent cracks.