Journal article
Effect of sand dilation on distortions and pattern allowances during steel sand casting
International Journal of Cast Metals Research, Vol.30(5), pp.257-275
09/03/2017
DOI: 10.1080/13640461.2017.1290909
Abstract
Mechanical interactions between the sand mold and casting have a great impact on pattern allowances. In this study, the effect of core expansion on distortions during steel casting is investigated. A hollow steel cylinder is cast using silica and zircon sand cores. The evolution of the cylinder's inner diameter is measured in situ using LVDTs. During solidification, core expansion is found to distort the inner diameter into a barrel-shaped profile, generating the largest expansion at the mid-height. The experiments are simulated using a sequential thermo-mechanical coupling. In the stress analysis, the steel and sand are modeled using an elasto-visco-plastic constitutive law and the Drucker-Prager Cap model, respectively. The simulations reveal that sand dilation due to shear stresses, as opposed to thermal expansion, accounts for the majority of the increase in the inner diameter. The measured and predicted pattern allowances are found to be in excellent agreement.
Details
- Title: Subtitle
- Effect of sand dilation on distortions and pattern allowances during steel sand casting
- Creators
- D Galles - University of IowaC Beckermann - University of Iowa
- Resource Type
- Journal article
- Publication Details
- International Journal of Cast Metals Research, Vol.30(5), pp.257-275
- Publisher
- Taylor & Francis
- DOI
- 10.1080/13640461.2017.1290909
- ISSN
- 1364-0461
- eISSN
- 1743-1336
- Grant note
- 2012-525 / Advanced Technology Institute, Summerville J335 / Defense Logistics Agency Logistics Operations (10.13039/100005711)
- Language
- English
- Date published
- 09/03/2017
- Academic Unit
- Mechanical Engineering
- Record Identifier
- 9984196532802771
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