FRACTURE-MECHANICS ANALYSIS OF THE MICROBOND TEST

The microbond test is simulated using a fracture mechanics concept and finite element (FE) analysis. The FE model takes into account the ell iptical geometry of the droplet and frictional contact caused by surfa ce roughness and local compression from the microvise. The effects of interface parameters, some geometrical parameters and coulomb friction on load versus displacement curves and load versus crack length curve s are investigated. A simple data reduction scheme for friction influe nced curves is suggested. From the results it appears that the debondi ng process is strongly influenced by interfacial friction. Therefore a simple estimation of interfacial adhesion from the microbond test see ms difficult. (C) 1998 Elsevier Science Ltd. All rights reserved.