Journal
MATERIALS & DESIGN
Volume 198, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2020.109291
Keywords
Corrugated panel; Additive manufacturing; Selective laser inching; Energy absorption; Crush force efficiency
Categories
Funding
- National Natural Science Foundation of China [51905269, 51735005]
- National Key Research and Development Program Additive Manufacturing and Laser Manufacturing [2016YFB1100101, 2018YFB1106302]
- National Natural Science Foundation of China for Creative Research Groups [51921003]
- Natural Science Foundation of Jiangsu for Youths [BK20170787]
- 15th Batch of Six Talents Peaks Innovative Talents Team Program Laser Precise Additive Manufacturing of Structure-Performance Integrated Lightweight Alloy Components [TD-GDZB-001]
- 2017 Excellent Scientific and Technological Innovation Teams of Universities in Jiangsu Laser Additive Manufacturing Technologies for Metallic Components - Jiangsu Provincial Department of Education of China
- Postgraduate Research AMP
- Practice Innovation Program of Jiangsu Province [KYCX20_0194]
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The novel superimposed sine-wave (SSW) structure fabricated using selective laser melting (SLM) showed excellent energy absorption performance under compression, with potential applications in aerospace, protective armor, and automotive industries.
A novel superimposed sine-wave (SSW) structure was designed and fabricated by selective laser melting (SLM) in this work. The energy absorption performance, deformation modes, and fracture mechanism of heat-treated SSW components under compression were studied. The formability was analyzed and the results showed that the SLM fabricated SSW components possessed nearly dense microstructure and smooth surface morphology. The numerical simulation model was established to show the stress distribution and deformation mechanism during compression, and the fracture morphologies of SSW components were investigated. Experimental results indicated that the SSW components exhibited a maximum crush force efficiency (GE) of 73.06%, which was higher than most reported energy absorption structures. As the height of sinusoid 1 (H-t) increased, the energy absorption (EA) and specific energy absorption (SEA) gradually increased to 37.73 J and 8.45 J/g, respectively. Simulation results revealed that the secondary trough had a large deformation during the compression process, which greatly enhanced the load uniformity of the structure. Fracture mode of SSW components was ductile fracture due to the post heat treatment. The SSW structures had the potential to be used in aerospace, protective armor, and automotive industries. (C) 2020 The Authors. Published by Elsevier Ltd.
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