Abstract: Disclosed is a composite from about 50 wt. % to about 90 wt. % of a thermoplastic resin, wherein the thermoplastic resin comprises a polycarbonate polysiloxane copolymer; and from about 10 wt. % to about 50 wt. % of a carbon-based filler. The composite exhibits a dielectric constant ?? of between 5 and 20 and a dissipation loss ?? of between 0.1 and 6, measured at frequencies between about 10 and 120 GHz.

Abstract: A method for material lifetime evaluation includes: causing a stress to be applied to a material surface of a component based at least on a cycle of load properties over time; causing an image of the material surface to be captured as a captured image of a complete in-situ field; determining an area of a hysteresis of a stable surface strain region in a stress-strain curve of the material surface to determine a loss energy (first damage parameter) for low cycle fatigue modeling; determining a deformation energy (second damage parameter) for high cycle fatigue monitoring; determining a failure parameter based on at least one of the first damage parameter and the second damage parameter; comparing the failure parameter to a record in a database; and determining a remaining life of the component based on comparison of the failure parameter to the record in the database.

Abstract: A method for material lifetime evaluation includes: causing a stress or a strain to be applied to a material surface based at least on a cycle of properties over time; causing an image of the material surface to be captured as a captured image; and determining a surface strain energy density (SSED) model for the material surface based at least on the captured image. A system for material evaluation includes: a load generator configured to apply a stress or a strain to a material surface based at least on a cycle of properties over time; a sensor configured to capture an image of the material surface as a captured image; and a processor configured to determine a SSED model for the material surface based at least on the captured image. In the method and the system the captured image is correlated to the cycle of properties.