Variable Dimension Tubular Support for Mass-Strength Tradeoff
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Solution Overview
Problem
Conventional tubular structure supports face a tradeoff between reducing mass and maintaining strength, as increasing strength often leads to increased mass and manufacturing costs due to the need for pre-forming and post-forming processes to achieve desirable dimensions and mechanical properties.
Innovation Solution
A tubular structure support with variable dimensions and mechanical properties is produced using a process that forms sections with varying wall thickness, inner diameter, and outer diameter, incorporating transition zones to smoothly transition between sections, thereby reducing stress and achieving exceptional strength with reduced overall mass without costly pre-forming or post-forming steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If wall thickness is increased to compensate for increased strength demands in high load regions, then strength is improved, but mass increases
Solution Approach 1:
The tubular structure support implements variable wall thickness along its length, with thicker sections in high-load regions and thinner sections in low-load regions. This local differentiation of material properties allows the structure to achieve required strength where needed while minimizing mass in regions where less strength is required, directly resolving the contradiction between strength and mass.
Solution Approach 2:
The tubular structure is divided into multiple sections with different wall thicknesses, inner diameters, and outer diameters. Each section is optimized for its specific functional requirements, allowing the overall structure to achieve high strength where necessary while reducing mass in other regions, thereby resolving the strength-mass tradeoff.
2Manufacturing precision
If pre-forming and post-forming steps are added to achieve desirable dimensions and mechanical properties, then manufacturing precision is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The desired variable dimensions and mechanical properties are achieved during the primary forming process itself, rather than requiring separate pre-forming and post-forming operations. The forming process directly creates the final product with the required dimensional variations along the tubular length, eliminating additional manufacturing steps and reducing process complexity while maintaining high precision.
Data Source
AI summary
A support may include a hollow metallic tube extending over an axis and may include two opposing ends. The tube may include a plurality of sections disposed along the axis. A first section may be disposed at an end of the tube and include a first inner diameter, a first outer diameter, and a first wall thickness. A second section may be separated from the first section via a first transition zone. The second section may include a second inner diameter, a second outer diameter, and a second wall thickness. A third section may be disposed remote from the first section and be separated from the second section via a second transition zone. The third section may have a third inner diameter, a third outer diameter, and a third wall thickness. The wall thickness, inner diameter and outer diameter may vary along the tube between the plurality of sections.