A SMA-based non-concurrent honeycomb structure for reusable energy absorptionShow others and affiliations
2025 (English)In: Engineering structures, ISSN 0141-0296, E-ISSN 1873-7323, Vol. 328, article id 119727Article in journal (Refereed) Published
Abstract [en]
The combination of selective laser melting (SLM) and shape memory effect (SME) of shape memory alloys (SMA) enables to design and manufacture reusable energy-absorbing structures with complex geometry. Meanwhile, the material properties of SMA result in a design constraint that the local strain in energy-absorbing structures cannot exceed the certain limit, so the problem of maximizing the overall structure's energy absorption while limitation of local recoverable strain needs to be addressed. This study proposes a non-concurrent honeycomb structure (NHS) with curved substructures. By effectively controlling the local material's strain level, NHS maximizes specific energy absorption (SEA) while utilizing SMA recoverability for reusable energy absorption. The quasi-static compression and impact tests were progressively tested and analyzed to investigate the energy absorption characteristics, shape recovery laws, and influence of failure strain of NHS. The experimental results combined with parametric analysis demonstrate that NHS can effectively control the local strain, and the shape recovery rate after five cycles of compression-heating recovery is above 90 %. Despite the presence of localized fractures, the impact sample can still exhibit a high level of shape recovery rate at a higher structural compression ratio. Furthermore, NHS demonstrate a 38.066 % higher SEA compared to conventional honeycomb (CH).
Place, publisher, year, edition, pages
Elsevier BV , 2025. Vol. 328, article id 119727
Keywords [en]
Non-concurrent, Shape memory alloys, Honeycomb structure, Impact test, Quasi-static compression, Reusable energy absorption
National Category
Applied Mechanics Composite Science and Engineering
Identifiers
URN: urn:nbn:se:kth:diva-359977DOI: 10.1016/j.engstruct.2025.119727ISI: 001410588400001Scopus ID: 2-s2.0-85215859907OAI: oai:DiVA.org:kth-359977DiVA, id: diva2:1938222
Note
QC 20250217
2025-02-172025-02-172025-02-17Bibliographically approved