Failure Susceptibility in Thin Films with Extensive Incompatibility in Thermo-Elastic Material Properties

Igor Dobovšek

doi:10.4028/www.scientific.net/KEM.665.225

Paper Titles

Unable to Detect Burial Defective Rubber Sheet in Digital Image Correlation Method
p.209

Research on the Variation of Residual Stress in the Rail Caused by the Wheels Repeated Rolling
p.213

Mechanical Properties and Corrosion Mechanism of GFRP Rebar in Alkaline Solution
p.217

An Effect of Laser Hardening on Contact and Bending Fatigue of a 42CrMo4 Steel
p.221

Failure Susceptibility in Thin Films with Extensive Incompatibility in Thermo-Elastic Material Properties
p.225

Study of Reticulated Vitreous Carbon Foam as a Quasi-Brittle Material
p.229

Effect of Voids on a Magistral Crack in Piezoelectric Brittle Materials
p.233

Damage Model for Degradation Induced by Volcanic Ash Deposition on Thermal Barrier Coatings
p.237

Statistical Analysis of SHM Passive Sensing Systems
p.241

HomeKey Engineering MaterialsKey Engineering Materials Vol. 665Failure Susceptibility in Thin Films with...

Failure Susceptibility in Thin Films with Extensive Incompatibility in Thermo-Elastic Material Properties

Abstract:

We discuss the impact of residual stresses, caused by variation in external temperature fielddue to mismatch in thermal and elastic material properties in dissimilar two-phase system composedof a thin film and a flexible substrate, on failure behavior of the system. In the process of modeling, arepresentative volume element of the system is defined as a heterogeneous two-phase layered elementbonded at an interface in a sense of coherent bi-layer with classical interface conditions, which canbe described as a sharp interface. We use a spatial averaging technique in transversal direction ofthe element with particular form of strain field that satisfies compatibility equations in the bulk andat the interface. With developed methodology we are able to determine residual stress distributionthrough thickness of the representative volume element. With known distribution of the stress field,we formulate a corresponding failure criterion in the form of characteristic failure surfaces.