The bond model (CZM) is often used in numerical methods for damage simulation of adhesive joints based on fracture mechanics. There are three main methods available for deriving CZM laws: property discriminant method, inverse method, and direct method. This study evaluated the tensile fracture toughness (GIC) and CZM law of adhesive joints of two different adhesives. A DCB (Double Cantilever Beam) test was used. Experimental efforts included characterizing the tensile failure properties of two structural adhesives using the J-integral approach.To measure the tensile relative displacement (dn) of the adhesive layer at the fracture tip, a computerised image correlation approach was used. FE simulations were performed to analyze the accuracy of the triangular, trapezoidal and linear exponential CZM laws in predicting the experimental behavior of the DCB test. This paper provides information on the applicability of these CZM rules to all types of adhesives, enabling subsequent strength prediction of adhesive joints.
Author(s) Details:
R. L. Fernandes,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, R. Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal.
R. D. S. G Campilho,
INEGI – Pólo FEUP, Rua Dr. Roberto Frias, 400, 4200-465 Porto, Portugal.
Please see the link here: https://stm.bookpi.org/TAIER-V3/article/view/8422
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