Composite-Metal Rod Joint Using Grooves and Hoop Reinforcement
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Solution Overview
Problem
The challenge lies in creating a reliable and cost-efficient load transfer mechanism between composite and metallic materials, as existing methods for composite to metallic joints are labor-intensive and expensive due to complex shapes and machined parts, hindering the wider use of composite materials in systems.
Innovation Solution
A method involving the formation of grooves in both composite and metallic components, with a composite hoop reinforcement applied circumferentially and solidified, to create a joint that securely connects the two materials while reducing manufacturing costs by simplifying the joint design and process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional composite to metallic joints are used, then reliable load transfer is achieved, but manufacturing cost increases and manufacturing complexity increases
Solution Approach 1:
The joint is segmented into distinct functional zones: a tapered interference fit section for initial load transfer and alignment, and a grooved section with circumferential reinforcement for enhanced mechanical interlocking. This segmentation allows each zone to perform its specific function optimally while simplifying the overall manufacturing process compared to traditional complex machined joints
Solution Approach 2:
The metallic component is inserted into the composite component, creating a nested configuration where the metallic rod with grooves is positioned within the composite rod. The circumferential reinforcement nests within the grooves, creating multiple nested layers that enhance load transfer while maintaining a compact structure
2Reliability
If traditional composite to metallic joints are used, then reliable load transfer is achieved, but device complexity increases
Solution Approach 1:
The joint structure is divided into functional segments: a tapered interference fit region and a grooved reinforcement region. This segmentation simplifies the design by assigning specific functions to each segment, reducing the overall complexity compared to traditional monolithic complex joint designs
Solution Approach 2:
The joint employs local quality by providing reinforcement only in specific locations where it is most needed - the grooves are positioned at critical stress points and the circumferential reinforcement is applied locally rather than uniformly throughout the entire joint, simplifying the overall design while maintaining reliability
3Weight of moving object
If composite materials are used in weight constrained environments, then weight reduction is achieved, but integration into wider systems becomes difficult due to expensive composite to metallic joints
Solution Approach 1:
The metallic component is pre-formed with grooves and tapered sections before insertion into the composite component. The circumferential reinforcement is applied in advance to the metallic component, allowing for simplified assembly and reducing on-site manufacturing complexity and costs
Solution Approach 2:
The metallic component acts as an intermediary element between the composite rod and the wider metallic system. It provides a standardized interface that facilitates integration while maintaining the weight benefits of composite materials, and the grooved design with circumferential reinforcement ensures reliable load transfer through this intermediary
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 approach enables effective load transfer between composite and metallic components, enhancing integration and reducing manufacturing costs by simplifying the joint design and process, thus making composite materials more viable for weight-constrained applications.
Implementation Method 1
A composite hoop reinforcement is applied in the second groove in a circumferential direction and the composite component and the composite hoop reinforcement are solidified
Implementation Method 2
the composite component and the composite hoop reinforcement are solidified
Data Source
AI summary
A method of forming a joint between a composite component and a metallic component is disclosed. The method includes forming a first groove in an outer surface of the metallic component on a first end of the metallic component. The first groove extends circumferentially on the outer surface relative to a center axis of the metallic component, and the first groove extends radially inward from the outer surface relative the center axis. The method further includes inserting the first end of the metallic component into a first end of the composite component. A second groove on the composite component over the first groove of the metallic component such that the composite component extends radially inward into the first groove of the metallic component. A composite hoop reinforcement is then applied in the second groove in a circumferential direction and the composite component, and the composite hoop reinforcement are solidified.