|About this Abstract
|2022 TMS Annual Meeting & Exhibition
|Late News Poster Session
|Formation of Macroscopic Deformation Band in Porous Metals with Unidirectional Pores
|Mahiro Sawada, Shinsuke Suzuki
|On-Site Speaker (Planned)
Macroscopic deformation bands are often observed during the compression of porous metals. It should be suppressed since it leads to stress drop but where the bands form is yet to be clarified. The objective of this research was to predict the formation of deformation bands from initial pore structure in porous metals with unidirectional pores. A pore structure was prepared which had irregular pore alignment, pore diameter of 3 mm, edge length of 25 mm, and porosity of approx. 35 pct. Theoretical calculation of stress concentration factor in a plate with an infinite row of pores was employed to estimate stress concentration at each cell wall. The deformation band was considered to form at the horizontal stream of cell walls with a relatively high stress concentration factor. The formation was successfully confirmed in the numerical analysis as a continuation of the cell walls with relatively large equivalent plastic strain.
|Computational Materials Science & Engineering, Mechanical Properties, Aluminum