Study of the intrinsic dissipation associated to the plastic work induced by a ball impact

Bouferra, R.; Pron, Hervé; Henry, J.F.; Bissieux, C.; Beaudoin, Jean Louis

doi:10.1016/j.ijthermalsci.2004.07.001

Cited by 8 publications

(2 citation statements)

References 2 publications

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“…The local magnification of mechanical forces as a result of a dynamic collision (impact) and their detrimental effects on natural and engineered systems have been studied extensively [1][2][3][4]. A relatively new approach for the mitigation of damage induced by impact is the use of bistable structures, which in contrast to the more ubiquitous mechanisms of dissipation and scattering [5][6][7][8], reduces the effect of impact by reversibly "locking" some of the energy imparted by a shock or impact into the form of strain energy [9,10]. Both the performance and reversibility of bistable structures for impact mitigation are attractive, as the energy locking mechanism could be used in conjunction with other mechanisms [11], such as dissipation, and the structures can ostensibly be reset in a controllable fashion for reuse.…”

Section: Introductionmentioning

confidence: 99%

Dependence of the kinetic energy absorption capacity of bistable mechanical metamaterials on impactor mass and velocity

Fancher¹,

Frankel²,

Chin³

et al. 2023

Preprint

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Using an alternative mechanism to dissipation or scattering, bistable structures and mechanical metamaterials have shown promise for mitigating the detrimental effects of impact by reversibly locking energy into strained material. Herein, we extend prior works on impact absorption via bistable metamaterials to computationally explore the dependence of kinetic energy transmission on the velocity and mass of the impactor, with strain rates exceeding 10 2 s −1 . We observe a large dependence on both impactor parameters, ranging from significantly better to worse performance than a comparative linear material. We then correlate the variability in performance to solitary wave formation in the system and give analytical estimates of idealized energy absorption capacity under dynamic loading. In addition, we find a significant dependence on damping accompanied by a qualitative difference in solitary wave propagation within the system. The complex dynamics revealed in this study offer potential future guidance for the application of bistable metamaterials to applications including human and engineered system shock and impact protection devices.

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Section: Introductionmentioning

confidence: 99%

Dependence of the kinetic energy absorption capacity of bistable mechanical metamaterials on impactor mass and velocity

Fancher¹,

Frankel²,

Chin³

et al. 2023

Preprint

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“…Even though scientific reasons justify this recent interest (e.g. (Chrysochoos et al, 1989), (La Rosa et al, 2000), (Chrysochoos 2002), (Louche et al, 2005), (Bouferra et al, 2005), (Doudard et al, 2007), (Pastor et al, 2008)), the pragmatic reasons for this involvement is the availability of affordable IRFPA cameras on the civil market and their numerical array data format that simplify data processing.…”

Section: Introductionmentioning

confidence: 99%

A study of IRFPA camera measurement errors: radiometric artefacts

Poncelet

Witz²,

Pron

et al. 2011

Quantitative InfraRed Thermography Journal

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Infrared Focal Plane Array cameras have several aberrations and measurement artefacts with different material origins: lenses, sensors, Read-Out-Circuits of the sensors. The authors' goal is to characterize each artefact separately to obtain more versatile correction procedures and improve the correction accuracy. This paper focuses on some radiometric artefacts associated with variations of measured illuminance. It presents a new correction algorithm dedicated to Narcissus and vignetting effects, which is identified and validated for two different lenses. It also proposes an innovative experimental protocol to detect low-level contrast-induced artefacts. Several R&D cameras and lenses are tested and some present such artefacts, which can not be corrected by traditional pixel-to-pixel methods. Their origins are shown to derive either from the optical system or the Read-Out-Circuit.

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Adiabatic temperature increase associated with deformation twinning and dislocation plasticity

2012

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Study of the intrinsic dissipation associated to the plastic work induced by a ball impact

Cited by 8 publications

References 2 publications

Dependence of the kinetic energy absorption capacity of bistable mechanical metamaterials on impactor mass and velocity

Dependence of the kinetic energy absorption capacity of bistable mechanical metamaterials on impactor mass and velocity

A study of IRFPA camera measurement errors: radiometric artefacts

Adiabatic temperature increase associated with deformation twinning and dislocation plasticity

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