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Piezoelectric actuation of crack growth along polymer–metal interfaces in adhesive bonds

Published online by Cambridge University Press:  31 January 2011

Tianbao Du ,
Ming Liu ,
Steve Seghi ,
K. J. Hsia ,
J. Economy Economy  and
J. K. Shang
Tianbao Du
Affiliation:
Department of Materials Science and Engineering and Department of Theoretical and Applied Mechanics, University of Illinois at Urbana-hampaign, Urbana, Illinois 61801
Ming Liu
Affiliation:
Department of Materials Science and Engineering and Department of Theoretical and Applied Mechanics, University of Illinois at Urbana-hampaign, Urbana, Illinois 61801
Steve Seghi
Affiliation:
Department of Materials Science and Engineering and Department of Theoretical and Applied Mechanics, University of Illinois at Urbana-hampaign, Urbana, Illinois 61801
K. J. Hsia
Affiliation:
Department of Materials Science and Engineering and Department of Theoretical and Applied Mechanics, University of Illinois at Urbana-hampaign, Urbana, Illinois 61801
J. Economy Economy
Affiliation:
Department of Materials Science and Engineering and Department of Theoretical and Applied Mechanics, University of Illinois at Urbana-hampaign, Urbana, Illinois 61801
J. K. Shang
Affiliation:
Department of Materials Science and Engineering and Department of Theoretical and Applied Mechanics, University of Illinois at Urbana-hampaign, Urbana, Illinois 61801
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Abstract

A new experimental technique for determining mechanical properties of polymer–metal interfaces was developed by replacing the conventional mechanical testing machine with a piezoelectric actuator. The actuator was made from a thin ferroelectric ceramic beam attached to a bilayer polymer-metal composite specimen. The trilayer specimen was loaded by applying ac electric fields on the piezoelectric actuator to drive crack growth along the polymer-metal interface. Subcritical crack growth was observed along the epoxy/aluminum interface, and the growth rate was found to depend on the magnitude of the applied electric field. The fracture mechanics driving force for the crack growth was computed from the finite element analysis as a function of crack length, applied field, material properties, and specimen geometry. Kinetics of the crack growth was correlated with the piezoelectric driving force.

Type
Articles
Information
Journal of Materials Research , Volume 16 , Issue 10 , October 2001 , pp. 2885 - 2892
Copyright
Copyright © Materials Research Society 2001

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