Next Article in Journal
Nonlinear Modeling and Flight Validation of a Small-Scale Compound Helicopter
Next Article in Special Issue
Research on the Blow-Off Impulse Effect of a Composite Reinforced Panel Subjected to Lightning Strike
Previous Article in Journal
Blister Defect Detection Based on Convolutional Neural Network for Polymer Lithium-Ion Battery
Previous Article in Special Issue
Cracking Behavior of RC Beams Strengthened with Different Amounts and Layouts of CFRP
Article Menu
Issue 6 (March-2) cover image

Export Article

Open AccessFeature PaperArticle
Appl. Sci. 2019, 9(6), 1086; https://doi.org/10.3390/app9061086

How Soft Polymers Cope with Cracks and Notches

Department of Engineering and Architecture, University of Parma, Parco Area delle Scienze 181/A, 43124 Parma, Italy
*
Author to whom correspondence should be addressed.
Received: 5 February 2019 / Revised: 26 February 2019 / Accepted: 9 March 2019 / Published: 14 March 2019
(This article belongs to the Special Issue Fatigue and Fracture of Non-metallic Materials and Structures)
Full-Text   |   PDF [4550 KB, uploaded 15 March 2019]   |  
  |   Review Reports

Abstract

Soft matter denotes a large category of materials showing unique properties, resulting from a low elastic modulus, a very high deformation capability, time-dependent mechanical behavior, and a peculiar mechanics of damage and fracture. The flaw tolerance, commonly understood as the ability of a given material to withstand external loading in the presence of a defect, is certainly one of the most noticeable attributes. This feature results from a complex and highly entangled microstructure, where the mechanical response to external loading is mainly governed by entropic-related effects. In the present paper, the flaw tolerance of soft elastomeric polymers, subjected to large deformation, is investigated experimentally. In particular, we consider the tensile response of thin plates made of different silicone rubbers, containing defects of various severity at different scales. Full-field strain maps are acquired by means of the Digital Image Correlation (DIC) technique. The experimental results are interpreted by accounting for the blunting of the defects due to large deformation in the material. The effect of blunting is interpreted in terms of reduction of the stress concentration factor generated by the defect, and failure is compared to that of traditional crystalline brittle materials. View Full-Text
Keywords: soft materials; polymers; strain rate; defect tolerance; digital image correlation; stress concentrators; notch blunting soft materials; polymers; strain rate; defect tolerance; digital image correlation; stress concentrators; notch blunting
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Spagnoli, A.; Terzano, M.; Brighenti, R.; Artoni, F.; Carpinteri, A. How Soft Polymers Cope with Cracks and Notches. Appl. Sci. 2019, 9, 1086.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Appl. Sci. EISSN 2076-3417 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top