Effects of Surface Microstructure on the Strength of Adhesively Bonded Structures

"The experimental investigation in the present research is focused on the influence of surface roughness on the fracture resistance of an aluminum-epoxy interface. A layered double cantilever beam (LDCB) specimen was chosen for this experiment. The LDCB specimen was debonded by peeling off the epoxy layer from the aluminum substrate using a steel wedge. Interfacial fracture energy was extracted from the debond length by developing a closed-form solution for the specimen geometry based on a ""beam on an elastic foundation"" model. The experimental observations established a direct relationship between the surface roughness of aluminum substrates and the fracture resistance of the aluminum-epoxy interface. This relationship provides guidance to tailor optimal surface pretreatments of aluminum substrate to improve interfacial adhesion performance."

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Theoretical and Applied Mechanics

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2015

Author dc:creator

• Zhang, Sulin

Contributors dc:contributor

• Hsia, K. Jimmy

• Engineering, Materials Science

Language dc:language

eng

Identifier

(MiAaPQ)AAI3044272

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/87706