Stress distribution in iron powder during die compaction
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Date
2013-09-10
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Volume Title
Publisher
Australian Nuclear Science and Technology Organisation
Abstract
Granular materials are extremely important in food production, minerals extraction, pharmaceuticals and powder metallurgy. They can be poured like a liquid and yet can support static shear stresses like a solid (mounds do not collapse), Granular materials are always locally and macroscopically inhomogeneous making algebraic constitutive models difficult to develop. Numerical analysis using continuum (finite element) or individual particle (discrete element) models are being widely explored [1,2]. However, there were previously no methods for their experimental validation. This paper reports the application of the neutron diffraction strain scanning method, originally developed for residual stress measurements within engineering components, to the problem of the stress distribution in granular Fe under a consolidating pressures Strains were measured in axial, radial, circumferential and an oblique direction using the neutron strain scanning diffractometer KOWARI at ANSTO(Sydney) and the full stress tensor as a function of position wvas able to be extracted (e.g. Fig l). Results will be presented for a both a straight Walled and a converging die. Typical results using the converging die are shown in Fig. l.
Description
Physical copies of the abstract book held by ANSTO Library at DDC: 620.1123/20. Some papers from conference have been published in Materials Science Forum Vol. 777 available here: https://doi.org/10.4028/www.scientific.net/MSF.777
Keywords
Stresses, Iron, Powders, Compacting, Powder metallurgy, Liquids, Finite element method, Neutron diffraction, Measuring instruments, ANSTO
Citation
Kisi, E. H., Wensrich, C. M., Luzin, V., & Kirstein, O. (2013). Stress distribution in iron powder during die compaction. Presentation to MECA SENS 2013 : 7th International Conference on Mechanical Stress Evaluation by Neutron and Synchrotron Radiation, 10-12 September 2012, Coogee, Sydney, NSW, Australia, (pp. 104).