초록 ▼

A lightweight, three dimensional structural article having low radar reflectivity characteristics and good mechanical properties is fabricated from a syntactic foam core having a structural outer skin. A syntactic foam sealing adhesive film is applied to the surface of syntactic foam core and under

A lightweight, three dimensional structural article having low radar reflectivity characteristics and good mechanical properties is fabricated from a syntactic foam core having a structural outer skin. A syntactic foam sealing adhesive film is applied to the surface of syntactic foam core and under the outer skin to both seal the foam core and adhere the outer skin. The syntactic foam sealing adhesive is formulated to provide a uniform layer and to reduce the fabrication time and labor while improving the overall radar absorbing characteristics of the structural article.

대표청구항 ▼

1. A method of fabricating a three dimensional structural article having a desired configuration from a plurality of materials, each material having low radar reflectivity characteristics, said method comprising the steps of:providing a low density syntactic foam core; forming said foam core substan

1. A method of fabricating a three dimensional structural article having a desired configuration from a plurality of materials, each material having low radar reflectivity characteristics, said method comprising the steps of:providing a low density syntactic foam core; forming said foam core substantially into the desired configuration, said formed foam core having at least one exposed surface; providing an outer skin having a plurality of structural fibers intermixed with a resin matrix, said outer skin being configured to fit over and mate with the exposed surface of said formed foam core and having a dielectric constant of less than about 2.8; providing a syntactic foam sealing adhesive film adapted for sealing said exposed surface of said foam core and adhering with said outer skin, said syntactic foam sealing adhesive film having a dielectric constant of less than about 2.5 and said foam core having a dielectric constant which is less than that of said syntactic foam sealing adhesive film; supporting the formed foam core; placing a layer of the sealing adhesive film on the exposed surface of the formed foam core; placing the outer skin on the formed foam core such that the layer of sealing adhesive film is sandwiched between the outer skin and the exposed surface; and curing the structural article, such that the sealing adhesive film secures the outer skin to the foam core.