About this Abstract |
Meeting |
2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
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Symposium
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2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
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Presentation Title |
Cancellous Bone-Inspired Stochastic Network Lattice Manufactured via MEX With TPU for Advanced Shock-Absorbing Applications |
Author(s) |
Satoshi Yamada, Akihiko Nishimura, Hayato Suzuki, Keita Kawashima, Saori Miyajima, Yuelin Zhang, Yugo Motoi, Masahiro Todoh |
On-Site Speaker (Planned) |
Satoshi Yamada |
Abstract Scope |
This study presents a strut-based stochastic lattice structure—termed the cancellous bone-inspired stochastic network (CBSN) lattice—designed based on the structural and mechanical features of cancellous bone. The framework offers excellent three-dimensional isotropy and design flexibility. The CBSN lattice was implemented in a porous shock-absorbing material, additively manufactured using thermoplastic polyurethane (TPU) via material extrusion (MEX). Specimens (50 mm in diameter and 25 mm in height) were fabricated using different TPU types and varying lattice volume densities. Impact compression tests were conducted with a drop tower testing setup at 50 J of energy. The results showed that the maximum impact load was suppressed to levels comparable to those of conventional expanded polystyrene used in helmets, while exhibiting minimal deformation and withstanding multiple impacts. These findings demonstrate the potential of the TPU-based CBSN lattice for developing breathable materials with effective multi-impact absorption capabilities. |
Proceedings Inclusion? |
Planned: Post-meeting proceedings |