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@ARTICLE{Tiwari:873543,
author = {Tiwari, Avinash and Persson, Bo},
title = {{P}hysics of suction cups},
journal = {Soft matter},
volume = {15},
number = {46},
issn = {1744-6848},
address = {London},
publisher = {Royal Soc. of Chemistry},
reportid = {FZJ-2020-00811},
pages = {9482 - 9499},
year = {2019},
abstract = {We have developed a theory of air leakage at interfaces
between two elastic solids with application to suction cups
in contact with randomly rough surfaces. We present an
equation for the airflow in narrow constrictions which
interpolates between the diffusive and ballistic (Knudsen)
air-flow limits. To test the theory, we performed
experiments using two different suction cups, made from soft
polyvinylchloride (PVC), in contact with sandblasted
polymethylmethacrylate (PMMA) plates. We found that the
measured time to detach (lifetime) of the suction cups was
in good agreement with theory, except for surfaces with a
root-mean-square (rms) roughness below ≈1 μm, where
diffusion of plasticizer from the PVC to the PMMA surface
caused blockage of critical constrictions. The suction cup
volume, stiffness, and elastic modulus have a huge influence
on the air leakage and hence the failure time of the cups.
Based on our research we propose an improved biomimetic
design of suction cups that could show improved failure
times with varying degrees of roughness under dry and wet
environments.},
cin = {IAS-1 / PGI-1},
ddc = {530},
cid = {I:(DE-Juel1)IAS-1-20090406 / I:(DE-Juel1)PGI-1-20110106},
pnm = {141 - Controlling Electron Charge-Based Phenomena
(POF3-141)},
pid = {G:(DE-HGF)POF3-141},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:31701113},
UT = {WOS:000502539900007},
doi = {10.1039/C9SM01679A},
url = {https://juser.fz-juelich.de/record/873543},
}