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Primary Examiner: Lesmes, George F.
Assistant Examiner: Epstein, Henry F.
Attorney: Duncan; John R.

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Title: High strength composite structure

Abstract: An isogrid structure having inset strips of composite materials at the top and bottom of the grid webs. A preferably flanged isogrid basically consists of I-beam members arranged in an integral repeating pattern of substantially equilateral triangles. One flange may be integral with a skin sheet covering the structure. At least some of these flanges are provided with grooves running parallel to the beam webs, filled with advanced composite materials comprising high-strength fibers in a supporting matrix. Preferably, the fibers run parallel to the beam webs. Preferred arrangements of the fibers are described.

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Inventors: Slysh, Paul (San Diego, CA, US)

Application Number: 513661
Filing Date: 1974-10-10
Publication_date: 1977-03-15
Assignee: General Dynamics Corporation (San Diego, CA)
Primary Class(es): 428/116 52/630, 244/119, 273/DIG23, 428/119, 428/167, 428/178, 428/179, 428/902
Other Classes:
US Patent Ref:

3042050	Jul, 1962	Finlayson	428/12.
3099335	Jul, 1963	Sklar	52/729.
3323820	Jun, 1967	Braccini	52/81.
3349537	Oct, 1967	Hopfeld	52/729.
3743455	Jul, 1973	Green	425/78.
3778334	Dec, 1973	Sturgeon	428/902.
3840350	Oct, 1974	Tucke, Jr.	428/902.
3857150	Dec, 1974	Faucheux	52/81.

Other Refs: 47,113577,154

Mar, 1933	DK.
May, 1946	UK

Other References: The Isogrid an Article by Paul Slysh on pp. 102 to 107 of Machine Design, Apr. 19, 1973, vol. 45, No. 9.