Martin G Andrews

US Patent:

20130264421, Oct 10, 2013

Filed:

Apr 4, 2012

Appl. No.:

13/439403

Inventors:

Jason Lawrence Firko - Wilmington DE, US
Martin G. Andrews - Chadds Ford PA, US

Assignee:

The Boeing Company - Seal Beach CA

International Classification:

B64C 1/00
B23P 11/00
B29C 35/02
B32B 3/28
B32B 15/01

US Classification:

244117 R, 428174, 428603, 264219, 29428

Abstract:

In an embodiment of the disclosure, there is provided a hat stiffener. The hat stiffener has a cap. The hat stiffener further has a first web and a second web extending from opposite ends of the cap. The first web and the second web are non-linear and include at least one canted portion. The hat stiffener further has a first flange extending outwardly from a first web base portion and a second flange extending outwardly from a second web base portion.

US Patent:

20130344291, Dec 26, 2013

Filed:

Jun 24, 2012

Appl. No.:

13/531583

Inventors:

Steven E. Pearson - Lynnwood WA, US
Matthew M. Whitmer - Seattle WA, US
Rebecca M. Dixon - Wilmington DE, US
Jason L. Firko - Wilmington DE, US
Douglas G. Marciniak - Lake Stevens WA, US
Kenneth D. Cominsky - Mukilteo WA, US
Martin G. Andrews - Chadds Ford PA, US

Assignee:

The Boeing Company - Seal Beach CA

International Classification:

B32B 1/00
B64C 1/10
B32B 1/04
B32B 37/02

US Classification:

428157, 156212, 244121, 428174

Abstract:

There is provided a composite hat stiffener, a composite hat-stiffened pressure web, and a method of making the same. The composite hat stiffener has a composite hat section having a first side and a second side. The composite hat stiffener further has a plurality of composite stiffening plies coupled to the composite hat section. The plurality of composite stiffening plies include a body ply coupled to the first side of the composite hat section, a wrap ply coupled the body ply, and a base ply coupled to the body ply and the wrap ply. The composite hat stiffener further has a pair of radius filler noodles coupled to the composite hat section and disposed between the plurality of composite stiffening plies. The composite hat stiffener further has an outer ply coupled to the second side of the composite hat section.

US Patent:

20170308633, Oct 26, 2017

Filed:

Apr 26, 2016

Appl. No.:

15/138891

Inventors:

- Chicago IL, US
Martin G. Andrews - Freeland WA, US
Madhavadas Ramnath - Mukilteo WA, US
Andrew R. Anderson - Everett WA, US
Taeksun Nam - Woodinville WA, US
Gerald E. Mabson - Bellevue WA, US

International Classification:

G06F 17/50

Abstract:

An apparatus is provided for finite element modeling and analysis of a structural product. A pre-processing system may produce a finite element model of a structural product including component parts joined by a fastener. The finite element model may represent the product by respective meshes of elements including shell or solid elements for the component parts, and beam and spring elements for the fastener in which at least one spring element has an axial offset from the shell or solid elements with respect to an axis of the fastener. A processing system may perform a finite element method (FEM) failure analysis of the finite element model under an external load that is transferable from the component parts to the fastener. The FEM failure analysis may produce an output that indicates a behavior of the fastener, and the FEM failure analysis may predict a component failure rate of the fastener based on the behavior.