Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
BENDING AND TORSION FATIGUE ANALYSES OF CRANKSHAFTS
Submission Author:
Renan Ferreira , SP
Co-Authors:
Renan Ferreira, Marco Bittencourt
Presenter: Renan Ferreira
doi://10.26678/ABCM.COBEM2019.COB2019-0176
Abstract
The intensive search for optimized projects with lower production costs influenced by the global competition context has encouraged the development of lighter and more efficient combustion engines. The reduction of mass in engine crankshafts may have a significant impact on the performance of new engines. However, crankshafts have complex geometries and are subjected to high dynamic loads which are critical for fatigue failure. Furthermore, crankshafts always require caution in the design phases since any failure in operation could lead to catastrophic accidents. For this reason, new crankshaft models ought to be assessed and approved in standards to guarantee infinite life in fatigue. At this work a bending and a torsion resonant test rigs were designed and manufactured to evaluate the fatigue life of a commercial crankshaft model. Static structural numerical analyses were carried out to determine the stress distribution and critical areas for bending and torsion loads. Both bending and torsion test rigs presented good performance for fatigue testing and congruency with numerical analyses. The results obtained in this work cover broadly the fatigue phenomena in crankshafts for bending and torsion loads and can be used as base for the development of new crankshaft models.
Keywords
Crankshaft, Engines, Fatigue Test, Numerical analysis, Vibration
