Abstract
Abstract
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.
Funder
Division of Civil, Mechanical and Manufacturing Innovation
Subject
General Physics and Astronomy
Reference47 articles.
1. On mathematical and physical ladders;Freeman;Am. J. Phys.,1985
2. The surprising dynamics of a chain on a pulley: lift off and snapping;Brun;Proc. R. Soc. A,2016
3. On some Indian stringed instruments;Raman;Proc. Indian Assoc. Cultivation Sci.,1921
4. The sitar string, a vibrating string with a one-sided inelastic constraint;Burridge;SIAM J. Appl. Math.,1982
Cited by
5 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献