Scholarlink

<p>Simple cubic (SC) plate lattice structures exhibit a sharp buckling load drop followed by a flat post-buckling plateau, limiting their energy absorption. This behavior results from material properties and architecture. Hybridized SC lattices offer a solution, but material ductility plays a crucial role. This study explores ductility’s impact on buckling and post-buckling behavior in SC and hybridized lattices of similar relative density (RD). Hybrid designs integrate plate-based (BCC, FCC, Auxetic) and truss-based (Kelvin, Octet, FCC) unit cells, with 3/4th RD in SC quadrants and 1/4th RD in SC plates. Two materials with similar strength but a 12-fold ductility difference were analyzed. Computational homogenization identified optimal load-bearing orientations across 10–40% RD, while 30% RD structures were experimentally tested. Fabricated via material extrusion, plate hybridization (BCC, FCC) reduced post-buckling stress collapse by up to 35% and improved energy absorption (up to 37% more SEA) compared to SC, independent of ductility. Truss hybridization depended on ductility, showing no SEA improvement (decrease in SEA depends on lattice type) but reduced post-buckling stress collapse. These findings highlight material dependent hybridization’s potential to enhance SC lattice mechanical stability.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Effect of material ductility on the post buckling plateau and specific energy absorption of additively manufactured hybrid plate lattice structures

  • 期刊论文

  • 发表日期：

    2025年9月30日

查看全文
  • Yacob Medhin,
  • Omar Waqas Saadi,
  • Muhammad Khizer Ali Khan,
  • Kamran A. Khan

摘要

Simple cubic (SC) plate lattice structures exhibit a sharp buckling load drop followed by a flat post-buckling plateau, limiting their energy absorption. This behavior results from material properties and architecture. Hybridized SC lattices offer a solution, but material ductility plays a crucial role. This study explores ductility’s impact on buckling and post-buckling behavior in SC and hybridized lattices of similar relative density (RD). Hybrid designs integrate plate-based (BCC, FCC, Auxetic) and truss-based (Kelvin, Octet, FCC) unit cells, with 3/4th RD in SC quadrants and 1/4th RD in SC plates. Two materials with similar strength but a 12-fold ductility difference were analyzed. Computational homogenization identified optimal load-bearing orientations across 10–40% RD, while 30% RD structures were experimentally tested. Fabricated via material extrusion, plate hybridization (BCC, FCC) reduced post-buckling stress collapse by up to 35% and improved energy absorption (up to 37% more SEA) compared to SC, independent of ductility. Truss hybridization depended on ductility, showing no SEA improvement (decrease in SEA depends on lattice type) but reduced post-buckling stress collapse. These findings highlight material dependent hybridization’s potential to enhance SC lattice mechanical stability.