Graded-Wall Hollow Profile for High-Temperature Stability
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Solution Overview
Problem
Hollow profiles used in high-temperature processes face mechanical and thermomechanical instability due to unsintered pre-products deforming under their own weight, necessitating thick wall thicknesses which are inefficient in terms of material usage and weight.
Innovation Solution
The hollow profiles feature side and transverse walls with wall thicknesses increasing from the central region to the corner region, providing increased rigidity and stability through a graded thickness design, specifically in reaction-bonded silicon infiltrated SiSiC materials, reducing deformation and enhancing resistance to mechanical and thermomechanical loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If very thick wall thicknesses are selected for hollow profiles, then mechanical stability and resistance to deformation under own weight are improved, but material usage increases and weight increases
Solution Approach 1:
The hollow profile implements varying wall thicknesses at different locations: thicker walls at corner regions for enhanced stability against point loads, and thinner walls at central regions to reduce material consumption. This local differentiation of structural properties optimizes the balance between mechanical stability and material efficiency.
2Stability of the object's composition
If very thick wall thicknesses are selected for hollow profiles, then mechanical stability and resistance to deformation under own weight are improved, but weight increases
Solution Approach 1:
The hollow profile implements varying wall thicknesses at different locations: thicker walls at corner regions for enhanced stability against point loads, and thinner walls at central regions to reduce material consumption.
3Ease of manufacture
If uniform wall thicknesses are used, then manufacturing simplicity is maintained, but rigidity against point loads in corner regions is insufficient
Solution Approach 1:
The hollow profile implements varying wall thicknesses at different locations: thicker walls at corner regions for enhanced stability against point loads, and thinner walls at central regions to reduce material consumption.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design enhances the profiles' rigidity and stability against various loads, particularly in the corner regions, while minimizing material usage and weight, preventing plastic deformation in unsintered pre-products and maintaining stability in sintered states.
Implementation Method 1
extruded with a silicon carbide-containing mass and then sintered to form reaction-bonded silicon infiltrated SiSiC
Implementation Method 2
extruded with a silicon carbide-containing mass and then sintered to form reaction-bonded silicon infiltrated SiSiC
Data Source
AI summary
A high-temperature-stable hollow profile is described. The hollow profile is provided with side walls and transverse walls. Wall thicknesses of the side walls and of the transverse walls increase in cross-section from a central region to a corner region of the hollow profile.