Abstract

The elastic properties and adhesion of a thin silicone rubber membrane have been characterized. an effective instrumentation embodying a video-enhanced microscope, which meets force and displacement resolution of 0.1μN and 10 nm, was developed. It provides the capability of simultaneously measuring both the applied force and the resultant displacement of the thin polymer membrane. a linear theoretical elastic solution was applied to quantitatively interpret the measured central deflection of the membrane under a circular concentrical load. Young's modulus of the membrane can be easily determined once the applied force and the central deflection, together with the essential dimensions, are known. the membrane jumped into an adhesion contact when the punch approached the range of the inter-surface force across the punch-membrane gap. a pull-off event was observed at a nonzero contact circle when the tensile load reached a critical threshold. the experiment is basically consistent with a theoretical model based on linear elasticity and an energy balance. the new method can be used to measure mechanical behavior of prestressed ultra-thin bio membranes and thin-walled bio capsules with a residual stress. © 2005 Elsevier Ltd. All rights reserved.

Department(s)

Mechanical and Aerospace Engineering

Comments

Japan Society for the Promotion of Science, Grant P03216

Keywords and Phrases

Adhesion; Cohesive zone; Elastic properties; Mechanical characterization; Thin polymer membrane

International Standard Serial Number (ISSN)

0020-7403

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2024 Elsevier, All rights reserved.

Publication Date

01 Mar 2005

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