Fibre Composite Spring with Friction-Locked Strand Overlap
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Solution Overview
Problem
Fiber composite components face issues with delamination under load, particularly shear and tension, and have low carrying capacity under dynamic loads, which complicates weight savings and increases costs due to material usage and installation space constraints.
Innovation Solution
The fiber composite component design divides the load introduction structure into multiple strands guided in opposite directions, forming a friction-locked overlap to create a high-strength, large-area bond, allowing for independent design of the load introduction structure and reducing delamination risk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fiber composite component uses a loop-based load introduction structure, then the risk of delamination is reduced compared to other designs, but the carrying capacity under dynamic loads remains excessively low
Solution Approach 1:
The fiber composite material is divided into multiple separate strands (at least two strands) that are individually guided in opposite directions to form the load introduction structure. This segmentation allows each strand to independently bear loads and prevents delamination while maintaining high carrying capacity through the combined effect of multiple friction-locked strands
Solution Approach 2:
Instead of using a conventional loop design where fibers are bent into a loop, the invention guides adjacent strands in opposite directions (one clockwise, one counterclockwise) to form the eye. This inverted approach creates overlapping sections where strands friction-lock together, simultaneously reducing delamination risk and enhancing carrying capacity
2Strength
If the fiber composite component is designed with broader dimensions to compensate for low carrying capacity, then the load-bearing ability increases, but the installation space required and material usage increase
Solution Approach 1:
Dividing the material into multiple thin strands allows them to be tightly packed and friction-locked in an overlapping configuration, creating a compact load introduction structure that achieves high carrying capacity without increasing the overall volume or installation space requirements
Solution Approach 2:
The invention uses the composite nature of fiber strands with friction-locking connections to create a structure where the combined strength of multiple strands exceeds what would be achievable with a single solid section of equivalent volume, thereby maintaining high carrying capacity in a compact form
3Strength
If the fiber composite component uses broader dimensions to compensate for low carrying capacity, then the load-bearing ability increases, but the weight savings are adversely affected
Solution Approach 1:
The segmentation into multiple thin strands allows for optimized material distribution where each strand is sized precisely for its function, eliminating the need for excessive material that would be required in a solid broader design, thereby maintaining weight savings while achieving high carrying capacity
Solution Approach 2:
The invention changes the structural parameters from a solid broad section to multiple thin friction-locked strands, which alters the stress distribution and load-bearing mechanism to achieve higher specific strength (strength-to-weight ratio), thereby maintaining weight savings while compensating for low carrying capacity
4Strength
If the fiber composite component uses broader dimensions to compensate for low carrying capacity, then the load-bearing ability increases, but the costs increase
Solution Approach 1:
The segmented strand design allows for more efficient material utilization and reduced waste during manufacturing, as each strand can be precisely cut and positioned. The friction-locking mechanism eliminates the need for additional fasteners or complex assembly steps, thereby reducing manufacturing costs while achieving high carrying capacity
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 carrying capacity under high loads while minimizing material usage and weight, effectively preventing delamination and allowing for adaptable load introduction characteristics.
Implementation Method 1
two adjacent fiber composite material strands are each guided in opposite directions while forming an overlap extending over a specific angle amount to each form an eye and are connected to one another in a friction-locked manner with the lateral faces facing toward one another, in the section in which they are arranged overlapping
Data Source
AI summary
Described is a fibre composite component designed as a spring, comprising at least one spring section and at least one force transfer structure (2). In the end portion forming or surrounding the force transfer element (3) the fibre composite material of the fibre composite component (1) is divided, in a plane perpendicular to the longitudinal direction of the force transfer structure (2), into at least two fibre composite material strands (4, 4.1, 4.2). Two adjacent fibre composite strands (4, 4.1, 4.2) run in opposite directions, overlapping over a specific angular portion and each forming an eye, with their mutually opposed side faces (7) force-transmittingly connected in the overlapping portion.