Video: Chain coiling and impinging

Corbin, Nicholas; Hanna, James; Royston, Wesley; Singh, Harry; Warner, Rick

doi:10.1103/aps.dfd.2017.gfm.v0022

Cited by 1 publication

(1 citation statement)

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“…However, the ball chain itself has link-like elements, and a somewhat larger semi-rigid length scale associated with a minimum bending radius that influences a coiling radius during steady-state impingement, as pointed out by Hamm and Géminard. A conclusive apples-to-apples experiment involving two ball chains remained unperformed until the present study [36]. Another unresolved issue in these papers is the role of drop height, and thus velocity, of the impacting chains.…”

Section: Introductionmentioning

confidence: 85%

Impact-induced acceleration by obstacles

et al. 2018

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We explore a surprising phenomenon in which an obstruction accelerates, rather than decelerates, a moving flexible object. It has been claimed that the right kind of discrete chain falling onto a table falls faster than a free-falling body. We confirm and quantify this effect, reveal its complicated dependence on angle of incidence, and identify multiple operative mechanisms. Prior theories for direct impact onto flat surfaces, which involve a single constitutive parameter, match our data well if we account for a characteristic delay length that must impinge before the onset of excess acceleration. Our measurements provide a robust determination of this parameter. This supports the possibility of modeling such discrete structures as continuous bodies with a complicated constitutive law of impact that includes angle of incidence as an input.

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Section: Introductionmentioning

confidence: 85%