Chamfered Rectangular Honeycomb Structure with Angled Hexagon Cells
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Solution Overview
Problem
Conventional honeycomb structures with non-circular circumferential shapes, such as elliptical or variant-shaped hexagon cells, suffer from insufficient thermal shock resistance, particularly in large sizes, leading to potential cracking under thermal stress.
Innovation Solution
The honeycomb structure is designed with hexagon cells whose longest diagonal line forms an angle of 0 to 6 degrees with the long diameter, and the structure has a chamfered rectangular, trapezoidal, or triangular shape at the cross section, enhancing thermal shock resistance by reducing thermal stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a honeycomb structure has a non-circular circumferential shape (e.g., ellipse or variant shape), then it can achieve various shapes and upsizing, but thermal shock resistance becomes insufficient
Solution Approach 1:
The patent applies asymmetry by configuring hexagon cells at specific asymmetric angles (0-6°) relative to the long diameter of the non-circular honeycomb body. This asymmetric arrangement of cells, rather than symmetric distribution, resolves the contradiction by creating a structure that maintains thermal shock resistance despite the non-circular overall shape, enabling both shape variety and reliable thermal performance
2Ease of manufacture
If a honeycomb structure uses hexagon cells with arbitrary orientation, then manufacturing is simplified, but thermal stress distribution becomes uneven causing cracking
Solution Approach 1:
The patent applies parameter changes by specifying a precise angular parameter (0-6°) for the orientation of hexagon cells relative to the long diameter. This parameter control ensures uniform thermal stress distribution throughout the structure, preventing cracking while maintaining ease of manufacture through a straightforward angular specification that simplifies the manufacturing process
3Volume of moving object
If the honeycomb body is large in size, then it meets upsizing requirements, but thermal shock resistance deteriorates due to uneven stress distribution
Solution Approach 1:
The patent applies local quality by configuring hexagon cells with specific angular orientations (0-6°) in different regions of the large honeycomb body. This localized optimization of cell arrangement ensures that thermal stress is evenly distributed throughout the entire large structure, maintaining thermal shock resistance even as the honeycomb body increases in size to meet upsizing requirements
Data Source
AI summary
A honeycomb structure includes a honeycomb body having a partition wall defining a plurality of cells that extend from an inflow-end face as one end face to an outflow-end face as the other end face, the honeycomb body having a circumferential shape at a cross section orthogonal to an extending direction of the cells that is a rectangular shape with four corners being chamfered and having a long diameter and a short diameter, wherein the plurality of cells are hexagon cells having a hexagonal shape at the cross section orthogonal to the extending direction of the cells, and the hexagon cells are configured so that a longest diagonal line of each hexagon cell and the long diameter L of the honeycomb body form an angle that is 0 to 6°.