Campus Units

Aerospace Engineering, Materials Science and Engineering, Mechanical Engineering, Ames Laboratory

Document Type

Conference Proceeding

Conference

AIAA Aviation and Aeronautics Forum and Exposition

Publication Version

Accepted Manuscript

Link to Published Version

https://doi.org/10.2514/6.2020-2802

Publication Date

6-8-2020

Journal or Book Title

AIAA AVIATION 2020 Forum

First Page

2020-2802

DOI

10.2514/6.2020-2802

Conference Title

AIAA Aviation and Aeronautics Forum and Exposition

Conference Date

June 15-19, 2020

Abstract

Airborne structures are vulnerable to atmospheric icing in cold weather operation conditions. Most of the ice adhesion-related works have focused on mechanical ice removal strategies because of practical considerations, while limited literature is available for a fundamental understanding of the ice adhesion process. Here, we present fracture mechanics-based approaches to characterize interfacial fracture parameters for the tensile and shear behavior of a typical ice/aluminum interface. An experimental framework employing single cantilever beam, direct shear, and push-out shear tests were developed to achieve near mode-I and near mode-II fracture conditions at the interface. Both analytical (beam bending and shear-lag analysis), and numerical (finite element analysis incorporating cohesive zone method) models were used to extract mode-I and II interfacial fracture parameters. The combined experimental and numerical results, as well as surveying published results for the direct shear and push-out shear tests, showed that mode-II interfacial strength and toughness could be significantly affected by the test method due to geometrically induced interfacial residual stress. As a result, the apparent toughness of the zero-angle push-out test could reach an order of magnitude higher than those derived from direct shear tests. Moreover, it was found that the interfacial ice adhesion is fracture mode insensitive and roughness insensitive for tensile and shear modes, for the observed modes of failures in this study

Comments

This is a manuscript of a proceeding published as Dawood, B., Yavas, D., Giuffre, C.J. and Bastawros, A. "Characterization of Ice Adhesion: Approaches and Modes of Loading." Paper No. AIAA 2020-2802. In AIAA AVIATION 2020 Forum. (2020): 2802. DOI: 10.2514/6.2020-2802. Posted with permission.

Copyright Owner

American Institute of Aeronautics and Astronautics

Language

en

File Format

application/pdf

Published Version

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