Abstract

Toughening of brittle adhesive joints is a topic of great interest for the fabrication of layered structures. Recent experimental work by the authors indicated that spatially varying interface properties (i.e., patterned interfaces obtained using laser irradiation) could tune energy dissipation in plastically deforming adhesive joints. In this study, we use a cohesive zone approach to ascertain the interplay between fracture process zone size and pattern geometry on the overall work of separation. The analysis is carried out in the context of the elasto-plastic peeling response of adhesive bonded ductile thin sheets. The mating surfaces of the adherents feature alternating strips with strong and weak cohesive properties. Our finite element study shows that a careful choice of pattern length-scales, which requires a small area fraction of surface pre-treatment, allows to achieve a step-like increase in peel load and absorbed energy in otherwise brittle adhesive joints.

Department(s)

Mechanical and Aerospace Engineering

Publication Status

Open Archive

Comments

King Abdullah University of Science and Technology, Grant OSR-2017-CRG6-3388.01

Keywords and Phrases

Adhesive bonding; Cohesive model; Patterned interface; Peel loading

International Standard Serial Number (ISSN)

0020-7683

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2025 Elsevier, All rights reserved.

Publication Date

01 Aug 2020

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