A Damage Cohesive Model for Simulating 90° Peel Propagation in Anisotropic Conducive Adhesive Bonding
A modified cohesive zone interface model that has a damage factor couple with the thermal cycle and humidity aging was proposed. The damage factor not only can change the cohesive zone strength acting but also can effect on the energies of separation. The modified cohesive zone interfacial model is developed and implemented in ABAQUS, as a user element subroutine, to simulate the peeling process for the specimen bonding by anisotropic conducive adhesive film (ACF) under the thermal cycle and humidity tests. Finite element explicit code and the constitutive relation of this element has been defined by the user-defined mechanical material behaviour (VUMAT). The bulk material element selected is a 4-node bilinear plane stress quadrilateral element, and the reduced integration and hourglass control are also adopted. The numerical simulated results accorded well to the experiments to illustrate the validity of the new model.
Liangchi Zhang, Chunliang Zhang and Tielin Shi
J. Zhang et al., "A Damage Cohesive Model for Simulating 90° Peel Propagation in Anisotropic Conducive Adhesive Bonding", Advanced Materials Research, Vols. 139-141, pp. 374-377, 2010