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Bolt Load Relaxation and Fatigue Prediction in Threads with Consideration of Creep Behavior for Die Cast Aluminum
Technical Paper
2010-01-0965
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Bolt load retention is an important consideration in developing highly loaded structures with die cast aluminum due to its creep behavior. During development of a new cylinder block design, an objective was established to optimize the main bearing bolted joint design for bolt load retention. A creep model was developed from literature data, applied using detailed thread sub-models, and calibrated to produce results in good agreement with observed bolt load loss. This creep model was applied in sensitivity studies to investigate the effect of variation in thread engagement and installation load on bolt load loss. Selected thread sub-models were used with and without creep considerations to estimate high cycle fatigue safety in the bulkhead thread roots of a highly loaded cylinder block. Results from the investigation demonstrate that bolt clamp load loss due to creep can be simulated, and sensitivity studies can provide practical design guidance. Further, including the effects of creep can provide estimates for stress relaxation in threads, and its influence in fatigue predictions is assessed.
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Authors
Citation
DeJack, M., Ma, Y., and Craig, R., "Bolt Load Relaxation and Fatigue Prediction in Threads with Consideration of Creep Behavior for Die Cast Aluminum," SAE Technical Paper 2010-01-0965, 2010, https://doi.org/10.4271/2010-01-0965.Also In
References
- Chang C.C. Wang Q.G. “Modeling of Bolt Joint Behavior of Cast Aluminum Alloy (A380-T5) by Coupling Creep and Plasticity in Finite Element Analysis” Metallurgical and Materials Transactions B 38B August 2007 607
- Jaglinski T. Nimityongskul A. Schmitz R. Lakes R.S. “Study of Bolt Load Loss in Bolted Aluminum Joints” Transactions of the ASME 129 January 2007
- Kaufman J.G. “Properties of Aluminum Alloys: Tensile, Creep, and Fatigue Data at High and Low Temperature” ASM International Materials Park, OH The Aluminum Association Washington, D.C. 1999
- “Metric Screw Threads - M Profile” The American Society of Mechanical Engineers 345 East 47th Street, New York, N.Y 1998
- Simulia ABAQUS/Standard documentation for version 6.8-1 www.simulia.com/support/documentation.html
- AVL GmbH AVL-EXCITE, Theory, Version 2009, AVL, Graz (2009) www.avl.com
- Magna/Steyr FEMFAT, Theory, Version 4.7-c www.femfat.com
- Steinwender G. Gaier C. Unger B. “Fatigue Simulation During the Design Process of Vehicle Structures” ISATA 99 Conference Vienna, paper 99SI011 1999
- Gaier C. Dannbauer H. “An Efficient Critical Plane Method for Ductile, Semi-Ductile, and Brittle Materials” Fatigue 2006 Conference Atlanta 2006
- Blaha, J. Langmayr, F. Schackert, S. Chang, C.-C. et al. “Fatigue Strength Effect of Thread Forming Process in Cast Aluminum,” SAE Technical Paper 2006-01-0780 2006