Displacement Absorption Tunnels for Circular Bead Buckling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In plate assemblies, such as fuel cells, the circular bead seals face stress-related issues like buckling under compression, leading to potential leakage due to inadequate stress relief mechanisms.
Innovation Solution
The introduction of displacement absorption tunnels, both inner and outer, which intersect the circular bead and are offset from the planar portion, helps absorb and transfer stress, reducing the likelihood of buckling and maintaining the seal integrity by being radially aligned and having varying shapes like trapezoidal and arcuate configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the circular bead seal is compressed to ensure sealing, then the sealing effectiveness is improved, but the circular bead is prone to buckling and stress-related failures
Solution Approach 1:
The circular bead seal is segmented by introducing displacement absorption tunnels that pass through it, dividing the continuous bead into sections. This segmentation allows stress to be distributed and absorbed at the tunnel locations, preventing buckling while maintaining sealing effectiveness in the remaining bead sections.
Solution Approach 2:
The displacement absorption tunnels create a porous or hollow structure within the circular bead seal. These tunnels act as stress relief channels that absorb compressive forces, allowing the bead to maintain its sealing function without buckling under compression.
2Strength
If the circular bead is made thicker to resist buckling, then the buckling resistance is improved, but the stress relief capability is reduced
Solution Approach 1:
Rather than making the bead uniformly thicker, the invention segments the bead with displacement absorption tunnels. This allows the bead to maintain adequate thickness for buckling resistance while incorporating stress relief pathways that prevent stress concentration and failure.
Solution Approach 2:
The circular bead structure is transformed into a composite configuration combining solid bead material with hollow displacement absorption tunnels. This composite structure provides both the structural strength needed to resist buckling and the stress relief capability through the tunnel pathways.
3Reliability
If displacement absorption tunnels are added to the circular bead, then the stress relief capability is improved, but the structural complexity increases
Solution Approach 1:
The displacement absorption tunnels segment the circular bead into manageable sections. While this adds structural features, the segmentation approach provides a systematic and repeatable pattern that simplifies manufacturing and design compared to alternative stress relief methods.
Solution Approach 2:
The displacement absorption tunnels serve multiple functions simultaneously: they provide stress relief, prevent buckling, and maintain structural integrity. This multi-functionality reduces the need for additional separate components, thereby managing overall complexity while achieving multiple objectives.
Data Source
AI summary
A plate includes a planar portion and a circular bead, or circular bead seal, that is offset from the planar portion. An axis is substantially perpendicular to the planar portion, and the circular bead arcs about the axis. The axis may be defined by a hole through the planar portion that is substantially surrounded by the circular bead. One or more displacement absorption tunnels is offset from the planar portion and extends radially relative to the axis. Each of the displacement absorption tunnels intersects the circular bead. In some configurations the displacement absorption tunnels may have an arcuate shape, and in some configurations the displacement absorption tunnels may have a trapezoidal shape. A plurality of plates having similar, though not identical, features may be stacked together.