Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
A Study of Lightweight Assembled Crankshaft Behavior
Submission Author:
Gabriel Silva , SP
Co-Authors:
Gabriel Silva, Marco Bittencourt, Renan Ferreira
Presenter: Gabriel Silva
doi://10.26678/ABCM.COBEM2023.COB2023-0804
Abstract
Crankshafts are fundamental components of combustion engines. Traditionally manufactured by casting and forging processes, their fatigue resistance is experimentally verified with expensive and time consuming procedures. This study aims to investigate lightweight assembled crankshafts. The assembling process eliminates important stress concentrations on regions like fillets between crankpins and crank webs. It may also eliminate the need of oil holes to lubrication and cooling, since it is possible to use roll bearings. Additionally, the crankshaft components can be made with different materials. For example, crank webs do not serve a structural function and can be manufactured with materials of lower strength than crankpins and crank journals. In that way, the final product may have reduced costs without affecting the balancing and the structural strength. The work utilized ANSYS software based on the finite element method, to simulate the non-linearity caused by interference assembling. Numerical simulations estimate the natural frequencies of the crankshaft, focusing on the crank throw design with crankpin and crank journals made of AISI $4140$, and crank webs made of AISI $1045$. Validation of numerical results will be future achieved through resonant fatigue test rigs, commonly used in the automotive industry, for bending and torsion. This investigation advances crankshaft design and manufacturing by providing insights into the feasibility, cost-effectiveness, and performance benefits of lightweight assembled crankshafts.
Keywords
lightweight crankshafts, INTERNAL COMBUSTION ENGINES, Finite Element Method
