This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
CAE Process for Global Durability Analysis in Support of Up-Front Design
Annotation ability available
Sector:
Language:
English
Abstract
Traditionally, vehicle durability cracks have been treated to be local problems as a result of poor designs of notches, welds, holes, corners or reinforcements. The problems were usually found and fixed at a late design stage which often resulted in weight and cost penalties for a vehicle program. However, in many instances, the local problems mentioned above are simply the consequence of a poor global design. The global problems can generally be grouped into three categories: stress induced fatigue problems due to excessive global stresses as a result of body structural discontinuities, load induced fatigue problems due to excessive loads input to a body as a result of suspension designs, and vibration induced fatigue problems due to unfavorable structural resonance. The current paper presents a CAE analysis process which can be used at the upfront design stage to assess vehicle durability performances from a global design point of view. This process consists of a systematic durability surrogate vehicle selection method, ADAMS modeling for suspension load path study, and body modeling for vibration and global stress analysis. A vehicle model is employed to demonstrate how this process can be used to support up-front design for durability.
Authors
Citation
Kuo, E., Loh, W., and Murley, R., "CAE Process for Global Durability Analysis in Support of Up-Front Design," SAE Technical Paper 950576, 1995, https://doi.org/10.4271/950576.Also In
References
- Kuo. E. Y. “A Root-Cause Understanding of Structural Durability Phenomena of Body Systems,” Ford Research Laboratory Technical Report SR-91-169 Dearborn, Michigan November 7 1991
- Van Der Auweraer H. Liefooghe C. Leuridan J. “Structural Design Changes as a Solution to a Resonance Fatigue Problem of a Sports Car,” SAE 931341 March 1993
- “Guideline for Modeling an Automobile Body for NVH Analysis - Simplified Models,” Ford Vehicle Systems CAE Technical Report June 9 1992
- Kuo E. Y. Cheriyan J. Surulinarayanasami P. “Body Global Stress Model for Durability Analysis,” Ford Research Laboratory Technical Report SR-94-68 Dearborn, Michigan May 12 1994