Energy Performance of Non-Conventional Metal Tubular Systems via a New Multiaxial
This experimental study investigates the effect of a new loading path characterized by a new multiaxial alternation path, on the mechanical behaviour of metallic tubular structures. These are simple thin-walled tubes, recognized as one of the best energy absorption systems (EAS) in their class. Equi...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2025-01-01
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| Series: | MATEC Web of Conferences |
| Subjects: | |
| Online Access: | https://www.matec-conferences.org/articles/matecconf/pdf/2025/02/matecconf_iddrg2025_01044.pdf |
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| Summary: | This experimental study investigates the effect of a new loading path characterized by a new multiaxial alternation path, on the mechanical behaviour of metallic tubular structures. These are simple thin-walled tubes, recognized as one of the best energy absorption systems (EAS) in their class. Equipped with the same cylindrical cross-section geometry, the specimens used are of two metals, copper and aluminium, subjected to multiaxial alternating plastic buckling. For this purpose, a new specific experimental device (ACTP-S) has been developed. It is a new variant of our patented biaxial device (ACTP, [1]). The introduction of an alternative compression-torsion stress is designed to further promote the phenomenon of over-hardening during plastic flow. So, in addition to the classical uniaxial crushing entitled Bi0° as reference, three biaxial configurations BiS45, BiS53 and BiS60 governed by ACTP-S helicoids with their respective angles of inclination, are listed. Several plastic buckling tests were carried out under quasistatic (5 mm/min) and dynamic (9 m/s) regimes. Among other significant results, the study reveals an unquestionable improvement in energy absorption for multiaxial configurations, a gain of 84 % compared to the reference case in favor of BiS60, configuration of extreme complexity, justifying a change in the behavior of the materials. |
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| ISSN: | 2261-236X |