L-Profile Composite with Closed Channel for Bolting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Composite materials used in load-bearing structures face issues with low torsional rigidity and difficulty in bolting, which can weaken their load-carrying capacity, and have limited tearing strength near their ends.
Innovation Solution
A composite profile with an L-profile and a closed longitudinal channel, featuring ribs narrower than the flanges, allows for bolt placement outside the channel, using a drilling template to ensure accurate bolt hole placement and prevent nut rotation, facilitating easier assembly without compromising the profile's strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If hollow profiles are used to improve torsional rigidity, then torsional rigidity is improved, but bolting becomes complicated and load-carrying capacity is weakened
Solution Approach 1:
The hollow profile is segmented by introducing longitudinal grooves that divide the internal cavity into separate channels. This segmentation allows bolts to be positioned in the grooves without passing through the entire wall thickness, simplifying the bolting process while maintaining the torsional rigidity of the hollow profile structure
Solution Approach 2:
Longitudinal grooves act as intermediary elements that facilitate bolt placement. The grooves provide a dedicated pathway for bolts to engage with the profile without requiring penetration through the main wall structure, thus maintaining load-carrying capacity while enabling easy assembly
2Ease of manufacture
If angle sections are used to simplify joining, then ease of joining is improved, but torsional rigidity deteriorates
Solution Approach 1:
The invention merges the advantages of both angle sections and hollow profiles by combining the L-shaped geometry (which provides ease of joining) with a hollow internal structure (which provides torsional rigidity). The longitudinal grooves are integrated into the hollow profile to enable easy bolting, thus merging the benefits of both profile types into a single optimized structure
3Weight of moving object
If composite profiles with longitudinal fibres are used to reduce material usage, then weight is reduced, but tearing strength near end portions deteriorates
Solution Approach 1:
End portions of the composite profile are reinforced with additional fibres or thicker cross-sections before the critical loading zones. This preliminary reinforcement prevents tearing at the ends while maintaining the lightweight characteristic of composite materials in the main body, addressing the weakness at critical locations without compromising overall weight efficiency
Data Source
AI summary
An elongated composite profile comprising a first flange and a second flange, the first flange and the second flange together forming an L-profile, and each of the flanges, inside the L-profile, having been given a first rib and a second rib, respectively, and the first flange, the second flange, the first rib and the second rib forming a longitudinal closed channel in the composite profile and a method for mounting the same.