This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Numerical Analysis of Thermal Growth of Cast Aluminum Engine Components
Technical Paper
2008-01-1419
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
As-cast or as-solution treated cast aluminum A319 has copper solutions within its aluminum dendrite. These copper solutions precipitate out to form Al2Cu through a sequence of phase changes and bring with them volume changes at elevated temperatures. These volume changes, referred to as thermal growth are irreversible. The magnitude of thermal growth at a material point is decided by the temperature history of the material point. When an under aged or non heat treated cast aluminum is exposed to non-uniform temperature such as that during engine operation, thermal growth leads to non-uniform volume change and thus additional self balanced stresses. These stresses remain inside material as residual stresses even when the temperature of the material is uniform again.
In the present paper, numerical analysis method for thermal growth is developed and integrated into engine operation analysis. A user subroutine is written to interface thermal growth theory with commercial finite element code ABAQUS. The impact of thermal growth on durability of an engine cylinder head is illustrated by a real case study.
Recommended Content
| Technical Paper | New Aluminum Alloys for Cylinder Liner Applications |
| Journal Article | Neutron Diffraction Study on Residual Stress in Aluminum Engine Blocks Following Machining and Service Testing |
| Aerospace Standard | Aus-Bay Quenching of 300M Steel |
Authors
Citation
Chen, X., Su, X., Gustafson, P., and Allison, J., "Numerical Analysis of Thermal Growth of Cast Aluminum Engine Components," SAE Technical Paper 2008-01-1419, 2008, https://doi.org/10.4271/2008-01-1419.Also In
References
- Wolverton C. Allison J. E. A predictive model, FRL Technical Reports, SRR-2001-0168 Ford Motor Company 2001