Volume 132, Number 4, November 2020
|Number of page(s)||7|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||28 December 2020|
Buckling and snapping of a thin polymeric membrane exposed to a solvent drop
Micro Nano Bio - Fluidics Unit, Fluid Systems Laboratory, Department of Mechanical Engineering, Indian Institute of Technology Madras, Chennai 600036, India
Received: 25 July 2020
Accepted: 23 October 2020
We report the behavior of a thin and flat rectangular polymeric membrane, fixed at both ends, in contact with a solvent droplet. Depending on the solvent type and volume, and membrane thickness, three different regimes —no buckling, buckling, and snapping— are observed. Our study reveals that the behavior depends on the solubility parameter of the solvent and the ratio of the sum of swelling-induced force and capillary force to the elastic restoring force, i.e., the force ratio. We attempt to explain the phenomenon using the poroelastic and elastic recoil timescales. Using correlations from simple scaling, our model can estimate the maximum force ratio in terms of known quantities and predict the operating regime and maximum deflection. We expect our study will find significance in the design and analysis of systems involving flexible microbeams.
PACS: 46.32.+x – Static buckling and instability / 68.03.Cd – Surface tension and related phenomena
© 2020 EPLA
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.