Adjustable Flange-Bushing Insert for CFRP Sandwich Force Transfer
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Solution Overview
Problem
Existing solutions for mechanically coupling lightweight CFRP sandwich components to adjacent parts face challenges in optimizing force transmission, requiring individually tailored inserts that are costly and lack flexibility to accommodate thickness variations and geometric deviations.
Innovation Solution
An insert with adjustably connected flange bushings and a fastening element, allowing for adjustable and clamped connections to accommodate varying thicknesses and geometries, using a fine thread and optional bonding for optimal force distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If individually tailored inserts are used to accommodate thickness variations and geometric deviations, then force transmission reliability is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The insert design incorporates adjustable parameters including the position of the fastening element along the longitudinal axis and the orientation of the force transmission element. These parameter adjustments allow a standardized insert design to accommodate variations in sandwich structure thickness and geometry, achieving reliable force transmission without requiring individually tailored inserts for each application.
Solution Approach 2:
The insert system enables dynamic adjustment through the movable fastening element and rotatable force transmission element. This dynamic capability allows the same insert to adapt to different thickness variations and geometric deviations, resolving the contradiction between reliability and customization complexity by providing adjustability rather than requiring multiple fixed designs.
2Ease of manufacture
If standardized inserts are used to reduce manufacturing complexity, then ease of manufacture is improved, but adaptability to varying thicknesses and geometries deteriorates
Solution Approach 1:
The standardized insert incorporates a fastening element that can be positioned at different locations along the longitudinal axis and a force transmission element that can be oriented at different angles. This dynamic adjustability within a standardized design allows the insert to adapt to varying sandwich structure thicknesses and geometries while maintaining manufacturing simplicity through a single base design.
Solution Approach 2:
The insert design achieves multi-functionality by incorporating adjustable features that allow a single standardized insert to serve multiple applications with different thickness requirements and geometric configurations. The fastening element's variable positioning and the force transmission element's orientability enable one insert design to fulfill multiple functions across different sandwich structure variations.
3Strength
If the fastening element is rigidly fixed, then structural strength is improved, but ability to accommodate geometric deviations deteriorates
Solution Approach 1:
The connection between the fastening element and the first flange bushing is designed to allow relative movement, enabling the fastening element to adjust its position along the longitudinal axis. Similarly, the force transmission element can rotate relative to the second flange bushing. These dynamic capabilities allow the rigid fastening and force transmission components to accommodate geometric deviations while maintaining connection strength.
Solution Approach 2:
The insert is segmented into distinct functional elements: the fastening element, the first flange bushing, the force transmission element, and the second flange bushing. These segmented components can move relative to each other, allowing the system to accommodate geometric deviations while maintaining overall structural strength through the controlled relative movements between segments.
Data Source
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AI summary
The invention relates to a force transmission assembly and to an insert (6) for such a force transmission assembly, which insert has two flange bushes (28, 30), which flange bushes are adjustably connected to each other and are preferably clamped to each other.