Skip to main content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Cutting to Measure the Elasticity and Fracture of Soft Gels

Published

Author(s)

Teresa T. Duncan, Joel M. Sarapas, Adrian P. Defante, Kathryn L. Beers, Edwin P. Chan

Abstract

The fracture properties of very soft and/or brittle materials are challenging to measure directly due to the limitations of existing fracture testing methods. To address this issue, we introduce a razorblade-initiated fracture test (RIFT) to measure the mechanical properties related to fracture for soft polymeric gels. We use RIFT to quantify the elasticity, crack initiation energy, and the fracture energy of gellan hydrogels as a function of gellan concentration. Additionally, we use RIFT to study the role of friction in quantifying the fracture properties for poly(styrene-b-ethylene butadiene-b-styrene) gels as a function of test velocity. This new method provides a simple, efficient means to quantify the fracture properties of soft materials.
Citation
Soft Matter

Keywords

fracture, mechanics, polymer gels
Created August 30, 2020, Updated September 14, 2020