This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Dynamic and static fatigue on high deflection structures
Technical Paper
2018-36-0102
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
There are several types of structures and components in a vehicle that are developed to work as a mechanism, such as springs, torsion bars, axles and others. They are structures, since they consist of one solid body, without any motion joints but with degrees of freedom, granted by the total deflection of this body. This characteristic represents a challenge when performing a fatigue assessment, since the traditional method to predict fatigue (load history) is static and does not consider how the structure responds dynamically to the loading. In this work, we will perform durability assessments in two generic components of the vehicle: The first one, a classical structure (sub-frame) and the second one, a mechanism-structure (rear torsion axle). We will perform the assessments in both components using three different methods: Static load history, transient modal superposition and frequency domain modal superposition. The objective is to demonstrate how each of the three behaves for each type of structure, considering the static and dynamic approach.
Authors
Citation
Raphael, G., Henrique, M., Valdir, C., and Neil, B., "Dynamic and static fatigue on high deflection structures," SAE Technical Paper 2018-36-0102, 2018, https://doi.org/10.4271/2018-36-0102.Also In
References
- Y Zhang Full Vehicle Finite Element Model 4-Post Durability Analysis 2005-01-1402 2005
- N Bishop Finite Element Based Fatigue Calculations Glasgow NAFEMS Ltd 2000
- D Newland An Introduction to Random Vibrations, Spectral & Wavelet Analysis 3rd Dover Publications 2005
- H. Karadeniz Stochastic Analysis of Offshore Steel Structures Springer Series in Reliability Engineering London Springer-Verlag 2013
- G. Maymon Structural Dynamics and Probabilistic Analysis for Engineers Butterworth-Heinemann 2008
- T. Thesing Modern Methods for Random Fatigue of Automotive Parts 2016-01-0372 2016
- W Ferreira Comparative Study of Automotive System Fatigue Models Processed in the Time and Frequency Domain. 2016-01-0377 2016
- N Bishop Time vs Frequency Domain Analysis For Large Automotive Systems 2015-01-0535 2016
- N Bishop Advances Relating to Fatigue Calculations for Combined Random and Deterministic Loads. 2014-01-0725 2014
- N Bishop Advances Relating To Fatigue Calculations For Combined Random and Deterministic Loads 13th International ASTM/ESIS Symposium on Fatigue and Fracture Mechanics (39th National Symposium on Fatigue and Fracture Mechanics) Jacksonville 2013
- CAEfatigue VIBRATION (CFV) User Guide & Verification Manual (Release 3.0) UK CAEfatigue Limited 2016
- N Bishop Fatigue life prediction from power spectral density data. Part 1, traditional approaches and Part 2, recent developments. Env. Eng. 2989
- P Leisten Frequency Domain Fatigue Analysis of Exhaust Systems 2018-01-1396 2018