The Boeing Company

Matthew Steven Patterson

Thomas A Grandine

Mostafa Rassaian

Adriana Willempje Blom

Matthew Todd Grimshaw

Rassaian Mostafa

A composite part including a ply stack-up and resin is modeled. The modeling includes performing a convolution on a representation of the stack-up to approximate smoothed ramps between different plies of the stack-up.

Geometric modeling of composite parts

A computational optimization process uses the variable stiffness performance of composite laminates attributed to steered fiber to guide the design of stream functions describing the fibers to build it. This design process combines a finite element-based analysis tool, failure criteria and geometry optimization to determine steered angles associated with stream functions by an optimization program to meet target performance requirements, e.g., load condition(s), and failure criteria for quasi-static or dynamic events. The fiber angle distribution and thickness buildup are computed based on the stream function. The simulated structure is analyzed using finite element analysis. The disclosed process allows the designer to impose manufacturing constraints such as fiber steering radius.

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Seattle, WA, United States of America

Matthew Steven Patterson