Journal article
Stress shielding effect in pressure-assisted binder jetting
Powder technology, Vol.415, p.118146
02/2023
DOI: 10.1016/j.powtec.2022.118146
Abstract
A key challenge in binder jet additive manufacturing is the low density of fabricated parts. An emerging approach to mitigate the low density is comprised of in-situ uniaxial compression of the print. However, the applied pressure prompts a heterogeneous stress network between the ink-saturated print and the surrounding loose powder, i.e., stress shielding. In this work, we aim to investigate the effects of printing parameters on inducing stress shielding during compaction of a selectively inkjetted powder bed. We find that when compacted with dry powders, saturated powders experienced significantly reduced stresses. The size of print area occupied by the ink-saturated powder played a major role as a decreasing print area led to a more significant disparity in stress between the two regions. Lastly, a higher ink concentration within the print led to a more notable stress shielding effect in the printed region.
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•Saturated powders experienced reduced stresses when co-compacted with dry ones.•A smaller print area leads to a more significant disparity in stress in powder bed.•A higher ink concentration leads to a more notable stress shielding effect.•Compaction properties of different regions influence the stress shielding effect.
Details
- Title: Subtitle
- Stress shielding effect in pressure-assisted binder jetting
- Creators
- Levi KirbyFan FeiXuan Song
- Resource Type
- Journal article
- Publication Details
- Powder technology, Vol.415, p.118146
- DOI
- 10.1016/j.powtec.2022.118146
- ISSN
- 0032-5910
- eISSN
- 1873-328X
- Publisher
- Elsevier B.V
- Grant note
- DOI: 10.13039/100000181, name: Air Force Office of Scientific Research, award: FA9550-20-1-0700
- Language
- English
- Date published
- 02/2023
- Academic Unit
- Industrial and Systems Engineering; Injury Prevention Research Center
- Record Identifier
- 9984333159802771
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