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Journal of Materials Engineering and Performance
Erschienen in: Journal of Materials Engineering and Performance 3/2018

31.01.2018

Determination of Strain Rate Sensitivity of Micro-struts Manufactured Using the Selective Laser Melting Method

verfasst von: Recep Gümrük, R. A. W. Mines, Sami Karadeniz

Erschienen in: Journal of Materials Engineering and Performance | Ausgabe 3/2018

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Abstract

Micro-lattice structures manufactured using the selective laser melting (SLM) process provides the opportunity to realize optimal cellular materials for impact energy absorption. In this paper, strain rate-dependent material properties are measured for stainless steel 316L SLM micro-lattice struts in the strain rate range of 10−3 to 6000 s−1. At high strain rates, a novel version of the split Hopkinson Bar has been developed. Strain rate-dependent materials data have been used in Cowper–Symonds material model, and the scope and limit of this model in the context of SLM struts have been discussed. Strain rate material data and the Cowper–Symonds model have been applied to the finite element analysis of a micro-lattice block subjected to drop weight impact loading. The model output has been compared to experimental results, and it has been shown that the increase in crush stress due to impact loading is mainly the result of strain rate material behavior. Hence, a systematic methodology has been developed to investigate the impact energy absorption of a micro-lattice structure manufactured using additive layer manufacture (SLM). This methodology can be extended to other micro-lattice materials and configurations, and to other impact conditions.
Vorheriger Artikel Microstructures, Martensitic Transformation, and Mechanical Behavior of Rapidly Solidified Ti-Ni-Hf and Ti-Ni-Si Shape Memory Alloys
Nächster Artikel Electrolytic Synthesis of Ni-W-MWCNT Composite Coating for Alkaline Hydrogen Evolution Reaction

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Metadaten
Titel
Determination of Strain Rate Sensitivity of Micro-struts Manufactured Using the Selective Laser Melting Method
verfasst von
Recep Gümrük
R. A. W. Mines
Sami Karadeniz
Publikationsdatum
31.01.2018
Verlag
Springer US
Erschienen in
Journal of Materials Engineering and Performance / Ausgabe 3/2018
Print ISSN: 1059-9495
Elektronische ISSN: 1544-1024
DOI
https://doi.org/10.1007/s11665-018-3208-y

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