Stock material or miscellaneous articles – All metal or with adjacent metals – Plural layers discontinuously bonded
Patent
1974-03-18
1977-05-31
Rutledge, L. Dewayne
Stock material or miscellaneous articles
All metal or with adjacent metals
Plural layers discontinuously bonded
428595, 428174, 428166, B21D 1300
Patent
active
040259960
ABSTRACT:
Described herein are self-supporting structural elements formed of an integral sheet characterized by alternating elevations and depressions which sinusoidally vary about a flat or curved surface of neutrality, the element being suitable for use as a core in composite shell structures. The sinusoidal core element is curvilinearly continuous in passing from the peaks of the characteristic elevations through the surface of neutrality to the floors of adjoining depressions so that stress-raising discontinuities characteristic of prior art core elements are avoided. The core elements, which may be formed of any rigid metal material, e.g., steel, are preferably sinusoidally configured by explosive forming against a suitably configured die. The core elements can be employed singly or in plural, stacked relationship between both parallel and tapered or other irregular boundary layers.
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Crutchfield O. F.
Rutledge L. Dewayne
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