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Double-peaked impact force of very soft gel balls
| Title: | Double-peaked impact force of very soft gel balls |
| Authors: | Tanaka, Yoshimi1 Browse this author |
| Authors(alt): | 田中, 良巳1 |
| Issue Date: | 8-Mar-2006 |
| Publisher: | American Physical Society |
| Journal Title: | Physical Review E |
| Volume: | 73 |
| Issue: | 3 |
| Start Page: | 031403 |
| Publisher DOI: | 10.1103/PhysRevE.73.031403 |
| PMID: | 16605520 |
| Abstract: | We measure the time change of the contact force F(t) during the impact between very soft gel balls and a rigid substrate. For low-impact velocities V-i, F(t) is single-peak functions as intuitively expected; and the relation between V-i and the peak value F-m [of F(t)] obeys the prediction of the standard theory for the impact in the linear elastic regime (i.e., the Hertz theory). On the other hand, for large V-i, where the gel ball deforms into thin pancakelike shapes, F(t) becomes double-peak functions. We compare the data of F(t) for large V-i with a prediction of a model proposed in our previous study [Tanaka, Europhys. J. E 18, 95 (2005)]. The model can quantitatively reproduce the experimental F-m-V-i relation, and shows that the double-peak behavior of F(t) is a consequence of the expanding deformation of the pancake-shaped gel, i.e., spreading motion parallel to the substrate. |
| Rights: | Copyright © 2006 American Physical Society |
| Relation: | http://www.aps.org/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/8431 |
| Appears in Collections: | 創成研究機構 (Creative Research Institution) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 田中 良巳
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