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research-article

Specimen thickness dependency of energy release rate of a gelatine hydrogel and glass substrate interface

[+] Author and Article Information
Avinash A. Thakre

Department of Mechanical Engineering, Visvesvaraya National Institute of Technology, Nagpur 440010, Maharashtra, India
avinashathakre@gmail.com

Arun Kumar Singh

Department of Mechanical Engineering, Visvesvaraya National Institute of Technology, Nagpur 440010, Maharashtra, India
aksinghb@gmail.com

1Corresponding author.

ASME doi:10.1115/1.4041364 History: Received January 10, 2018; Revised August 30, 2018

Abstract

Soft solids such as rubbers, elastomers and gels are the important polymeric materials. A better understanding of their interfacial properties such as friction and fracture is critical for a variety of engineering and technological applications. Motivated by the observation that the interfacial properties can be modified even without changing the content of a soft solid, the effect of specimen thickness on the energy release rate of a soft gelatine hydrogel is investigated using direct shear sliding test. The slide-hold-slide (SHS) tests have shown that shear strength decreases, while corresponding crack length increases with the increase in thickness of the gel specimen. However at static, dynamic and residual strengths increase with the thickness of the gel specimen. These observations are explained using the concept of mixed mode I/II fracture and strain rate effect at the sliding interface.

Copyright (c) 2018 by ASME
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