What are the impacts of frame repair on a vehicle?

[DiEthan]

After the frame of a vehicle is repaired, it can have the following impacts: Generation of thermal stress: Irregular welding operations on such dynamic load-bearing components are a major taboo; the current primary method of welding involves heat source fusion bonding, and since heat is involved, the generation of thermal stress is unavoidable; Formation of cracks: If the operation is not performed well, various welding defects can occur, ranging from deformation to affecting the lifespan, and most critically, micro-cracks may form; micro-cracks are caused by poor fusion under thermal stress, and once cracks appear, they do not disappear on their own but gradually expand with load fluctuations until they lead to the final fracture of the component.