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US 6,644,529 B1Granted
Process to fracture connecting rods and the like with resonance-fatigue
OwnerSameh Hakim Andrawes Guirgis, Sudip Bhattacharjeeinventors
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OwnerSameh Hakim Andrawes Guirgis, Sudip Bhattacharjeeinventors
Estimating the term…
A process to fracture connecting rods and the like, that are made of high strength materials, comprises of the following mechanisms: (a) Fatigue: fluctuation of stresses in a pre-notched connecting rod due to the use of harmonic excitation will extend the notch tip in the connecting rod and will weaken the predetermined fracture plane by creating micro-cracks, (b) Resonance: resonance occurs when the frequency of the used harmonic excitation matches a natural frequency of the connecting rod, idealized as a structural system, (c) Pre-stressing forces: by applying pre-stressing forces acting in the same loading mode, the stresses in the connecting rod due to several force components can be superimposed, (d) Dynamic force: applying a dynamic force will raise the stress intensity factor, exceeding the fracture toughness of the material.
A process for the fracture separation of a connecting rod having an integrally formed cap and rod portion and a bore therethrough, along a predetermined fracture plane through said bore including the steps of:
A process for the fracture separation of a part having a bore therethrough along a predetermined fracture plane through said part and bore comprising applying a harmonic force to said part so as to fracture separate said part through said bore along said fracture plane;
Dependencies are inferred from the claim text.