A New Approach for Prediction of Crankshaft Stiffness and Stress Concentration Factors RWTH Aachen Univ

Format:

Conference/Event

Author/Creator:

Cevik, Cevik, author.

Contributor:

Maassen, Franz

Rebbert, Martin

Conference Name:

SAE 2010 World Congress & Exhibition (2010-04-13 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2010

Summary:

This paper introduces a new approach based on a statisticalinvestigation and finite element analysis (FEA) methodology topredict the crankshaft torsional stiffness and stress concentrationfactors (SCF) due to torsion and bending which can be used asinputs for simplified crankshaft multibody models and durabilitycalculations. In this way the reduction of the development time andeffort of passenger car crankshafts in the pre-layout phase isintended with a least possible accuracy sacrifice.With the designated methodology a better approximation toreality is reached for crank torsional stiffness and SCF due totorsion and bending compared with the empirical approaches, sincethe prediction does not depend on the component tests with limitednumbers of specimen, as in empirical equations, but on various FEcalculations. The predicted values deviate mostly in ±11% rangefrom FEA values of real cranks for torsion stiffness and SCF due totorsion, and maximum ±20% for SCF due to bending. Moreover thequality values of the multiple regression models are in 99% range,which leads to the conclusion that the models are stable and theregression fitting is very good. Therefore the equations generatedwith this approach can be further used for the prediction of cranktorsional stiffness and SCF due to torsion and bending. Anadditional aim of the study is to comprehend and reveal the shareof each influencing parameter on the investigated results. As aresult of a Pareto analysis it is found that the crank pin outerdiameter retains the highest effect on the torsional stiffness, thefillet radius on the SCF due to torsion and web length on the SCFdue to bending. These outcomes are valid for the ranges that aredefined for this study which should cover the passenger car inlinecrankshafts

Notes:

Vendor supplied data

Publisher Number:

2010-01-0949

Access Restriction:

Restricted for use by site license