Experimental Methods for Characterizing Interfaces in Multi-Material Adhesive Joints

Authors

• Kevin L. Cloherty, University of Massachusetts LowellFollow
• Drupad Kadiyala Bhavani, University of Massachusetts LowellFollow
• Dante P. Stigliano, University of Massachusetts LowellFollow
• Alexander H. Krueger, University of Massachusetts LowellFollow
• Christopher J. Hansen, University of Massachusetts LowellFollow
• Amy M. Peterson, University of Massachusetts LowellFollow
• Alireza V. Amirkhizi, University of Massachusetts LowellFollow

Keywords

Multi-material adhesion; Interface strength characterization; Poker chip test; Hat-shaped specimen; Traction-separation; Cohesive Zone Models

Tracks

TESTING AND VALIDATION STRATEGIES

DOI

10.5703/1288284318670

Abstract

Multi-material systems bonded with adhesives are increasingly used in engineering due to their design flexibility and performance. To fully optimize these systems, it is essential to characterize their interfacial properties accurately. However, standardized methods to characterize interfacial properties under pure stress states, especially in dissimilar material joints, are limited. This study presents a framework using modified poker-chip and hat-shaped specimens to promote dominant normal and shear adhesion behavior in polymer-ceramic systems. Custom fixtures were designed to reduce material use and maintain uniform adhesive thickness during sample preparation. Preliminary results demonstrate dominant mode-specific interfacial properties for various multi-material and adhesive configurations. Experimental data collected during testing will be further used for the construction and implementation of traction-separation laws for finite element cohesive zone modeling. This study offers insights into developing methodologies for preparing and characterizing bonded joints, with a future testing scope that extends from quasi static to dynamic loading environments, providing valuable data for modeling these interfaces.