Energy dissipation characteristics for AA6061 extrusions subjected to hybrid cutting/clamping at impact velocities up to 32 m/s

Magliaro, John; Altenhof, William; Gudisey, Anthony; Shakib, Aryen

doi:10.1016/j.ijmecsci.2021.106678

Cited by 8 publications

(4 citation statements)

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“…The accepted standard approach for analytically modeling unfilled [ 46 , 75 ] and PVC foam-filled [ 57 , 58 ] AA6061 tubes subjected to axial cutting and cutting/clamping involves the prediction of key points from the force response to predict the entire force/displacement response. Readers are encouraged to seek out the mentioned references for thorough, step-by-step derivations and discussions of the underlying theory.…”

Section: Methodsmentioning

confidence: 99%

“…The remaining geometric parameters are introduced in Appendix A and Appendix B . The forces associated with tube cutting, F cut , present with elastically dominated wedge indentation, F E , followed by plastic wedge penetration, F w , and steady-state cutting/clamping, F ss :

where the indentation, wedge penetration and steady-state forces can be predicted with respect to the axial displacement, x , utilizing Equation (18) through Equation (20), respectively [ 46 ].

…”

Section: Methodsmentioning

confidence: 99%

“…where the indentation, wedge penetration and steady-state forces can be predicted with respect to the axial displacement, x, utilizing Equation ( 18) through Equation ( 20), respectively [46].…”

Section: Compounded Cutting/foam Crushing Forcesmentioning

confidence: 99%

“…Hybrid energy absorbers, which subject the same thin-walled structures to more ideal cutting, splitting and tearing-based deformation modes [ 21 , 35 , 36 ], have recently emerged as promising, higher-capacity alternatives to axial crushing which can eliminate the dangerous and notoriously challenging fluctuations in the force response associated with this technology. Notable examples include combined metal/CFRP structures [ 30 , 37 , 38 , 39 ], compounded axial splitting/expansion [ 40 , 41 , 42 ], expansion/shrinking [ 43 ], splitting/shrinking [ 44 , 45 ] and axial cutting/radial clamping [ 46 , 47 ]. The latter deformation mode can meet and/or exceed the energy-absorbing capacity of the traditional axial crushing mode while simultaneously improving the force efficiency (i.e., reducing reaction force fluctuations) by a factor of 2 for sacrificial AA6061 energy-absorbing structures [ 48 ].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Influence of Extruded Tubing and Foam-Filler Material Pairing on the Energy Absorption of Composite AA6061/PVC Structures

Magliaro,

Mohammadkhani,

Rahimidehgolan

et al. 2023

Materials

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There is accelerating demand for energy-absorbing structures fabricated from lightweight materials with idealized, near-constant force responses to simultaneously resolve the engineering challenges of vehicle mass reduction and improved occupant safety. A novel compounded energy dissipation system composed of AA6061-T6 and AA6061-T4 tubing subjected to hybrid cutting/clamping and H130, H200 and H250 PVC foam compression was investigated utilizing quasi-static experiments, finite element simulations and theoretical modeling. Identical structures were also subjected to axial crushing to compare with the current state of the art. The novel cutting/foam crushing system exhibited highly stable collapse mechanisms that were uniquely insensitive to the tube/foam material configuration, despite the disparate material properties, and exceeded the energy-absorbing capacity and compressive force efficiency of the axial crushing mode by 14% and 44%, respectively. The simulated deformation profiles and force responses were consistent with the experiments and were predicted with an average error of 12.4%. The validated analytical models identified numerous geometric/material configurations with superior performance for the compounded AA6061/PVC foam cutting/foam crushing system compared to axial crushing. An Ashby plot comparing the newly obtained results to several findings from the open literature highlighted the potential for the compounded cutting/foam crushing system to significantly outperform several alternative lightweight safety systems.

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Section: Methodsmentioning

confidence: 99%

where the indentation, wedge penetration and steady-state forces can be predicted with respect to the axial displacement, x , utilizing Equation (18) through Equation (20), respectively [ 46 ].

…”

Section: Methodsmentioning

confidence: 99%

Section: Compounded Cutting/foam Crushing Forcesmentioning

confidence: 99%