The Boeing Company

Hangki Lee

Bernhard Dopker

Madhavadas Ramnath

Martin G Andrews

Gerald E Mabson

Chun-Liang Lin

Carlos Alberto Paez

Joshua D Barnard

Andrew R Anderson

Brian W Arent

Taeksun Nam

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.

System for finite element modeling and analysis of a structural product

A stringer having a stringer end trim that reduces pull-off forces in a stringer connection structure, including a stringer body; a stringer free edge provided on said stringer body; and a stringer end trim having at least one curvature provided in the stringer free edge forming the stringer connection structure.

Composite stringer end trim

Growing community of inventors

Mill Creek, WA, United States of America

Hangki Lee