On the identification of cohesive parameters for printed metal-polymer interfaces

Abstract

The mechanical behavior of printed electronics on fiber reinforced composites is investigated. A methodology based on cohesive zone models is employed, considering interfacial strengths, stiffnesses and critical strain energy release rates. A double cantilever beam test and an end notched flexure test are carried out to experimentally determine critical strain energy release rates under fracture modes I and II. Numerical simulations are performed in Abaqus 6.13 to model both tests. Applying the simulations, an inverse parameter identification is run to determine the full set of cohesive parameters.

Damage location sensing in carbon fiber composites using extrusion printed electronics

“…Another report uses CFRP in the shape of an aeronautical stiffener and inkjet prints silver contacts in strategic locations to measure the change of resistance due to bending in a diagonal direction [36]. The adhesion between inkjet printed silver on top of and in between CF composite layers has been studied experimentally and numerically [37][38][39]. The contact resistance between unidirectional prepregs and blade printed silver or copper was studied for different polishing methods to remove the epoxy [40,41].…”

On the Numerical Modeling and Validation of Fracture Mechanics for Printed Electronics Composites.

“…As the printed sensors become an integral part of the structure, the effect of the sensor array on the structural integrity is a major design aspect [2]. An optimal array has negligible effects on the load bearing capacity and provides high spatial accuracy in damage monitoring.…”