The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 21, 2018
Filed:
Dec. 14, 2016
Deutsches Zentrum Fuer Luft- Und Raumfahrt E.v., Cologne, DE;
Deutsches Zentrum fuer Luft- und Raumfahrt e.V., Cologne, DE;
Abstract
The load-bearing capacity of cylindrical shells of a composite fiber material that are at risk of buckling is determined by deriving improved reduction factors for analytical calculation of the design load. A load distribution head applies an axially acting force to a cylinder shell. A dent actuator dents the surface of the cylinder shell in a predetermined dent direction with a predetermined dent depth. A dent force is determined when a steadily increasing, axially acting force is applied to the cylinder shell by the load distribution head until a complete failure of the cylinder shell is detected. An analysis unit determines a dent depth from a data memory at which a dent force at a complete failure of the cylinder shell is at a maximum compared to dent forces of other dent depths.