Dual-Sided Isogrid Aircraft Panels for Lightweight Stiffness
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Solution Overview
Problem
Aircraft design faces a trade-off between structural integrity and weight, with traditional isogrid patterns often resulting in heavy panels due to complex intersections and parasitic material, which increases weight and reduces efficiency.
Innovation Solution
The use of a structural panel with a first raised pattern on one side and a second raised pattern on the reverse side, where the second pattern is rotated at an angle θ relative to the first, providing isotropic stiffness with reduced material usage by machining simpler geometric patterns on opposite sides, thereby minimizing parasitic material and weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional isogrid patterns are used to enhance structural integrity, then stiffness and strength are improved, but weight increases due to complex intersections and parasitic material
Solution Approach 1:
The traditional single-sided isogrid pattern is segmented into two separate patterns applied on opposite sides of the panel. Each side carries a simplified grid pattern that, when combined, provides the full isogrid structural benefit without the parasitic material intersections that occur in single-sided implementations
Solution Approach 2:
The solution moves from a single-plane (2D surface) isogrid pattern to a three-dimensional arrangement where identical grid patterns are applied on both the top and bottom surfaces of the panel, utilizing the thickness dimension to distribute structural loads more efficiently and eliminate intersecting material
2Stability of the object's composition
If complex isogrid patterns are machined to provide isotropic stiffness, then structural performance is improved, but manufacturing complexity increases
Solution Approach 1:
The complex single-sided isogrid pattern is divided into two simpler identical patterns that are manufactured separately on opposite sides of the panel. Each pattern is easier to machine independently, and their combination provides the full isotropic stiffness benefit
Solution Approach 2:
The same simplified grid pattern is copied and applied to both sides of the panel, eliminating the need to machine complex varying geometries on a single side. This copying approach maintains isotropic stiffness while significantly reducing manufacturing complexity
Data Source
AI summary
One embodiment includes a structural panel for an aerospace vehicle, including a single sheet of material, the material having a first raised pattern on a first side, and a second raised pattern on a reverse side, wherein a repeating portion of the first raised pattern is substantially identical in size and shape to a repeating portion of the second raised pattern, and is rotated at an angle θ to the first raised pattern.