Composite Profile with Orthogonal Shear Strength Zones
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Solution Overview
Problem
Composite profiles for doors, windows, and facade elements experience temperature-related deformations due to shear stresses, leading to reduced thermal insulation and fire protection, and requiring larger profiles with non-shearing or shear-resistant insulating bars, which compromise static loads and glazing area.
Innovation Solution
A composite profile design with orthogonally varying shear strengths in insulating strip zones, featuring a shear-resistant connection in one zone and a shear-free or shear-flexible connection in the other, achieved through different materials, transverse bars, and friction-minimizing means, allowing for temperature compensation and improved rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If shear-resistant insulating bars are used to prevent temperature-related deformations, then the rigidity and thermal insulation of the composite profile are improved, but the permissible static loads are reduced and the glazing area is limited
Solution Approach 1:
The insulating bar is divided into multiple sections (first insulating strip section, second insulating strip section) that can move relative to each other. This segmentation allows the insulating bar to accommodate thermal expansion and contraction while maintaining overall structural integrity, thus preserving rigidity without overly restricting static load capacity.
Solution Approach 2:
The insulating bar transitions from a rigid, fixed structure to a dynamic structure with movable sections connected by sliding guides. This allows the insulating bar to adapt to temperature changes through controlled movement, maintaining rigidity under normal conditions while permitting deformation during thermal cycles, thereby resolving the contradiction between rigidity and static load capacity.
2Loss of energy
If shear-resistant insulating bars are used to maintain structural integrity, then thermal insulation is improved, but the glazing area is reduced due to larger profile requirements
Solution Approach 1:
By segmenting the insulating bar into movable sections, the design achieves effective thermal insulation without requiring excessive profile thickness. The segmented structure maintains thermal breaks while allowing for more compact overall profile dimensions, thereby preserving glazing area.
Solution Approach 2:
The design changes the physical state and movement parameters of the insulating bar sections, allowing them to slide relative to each other. This enables the insulating bar to maintain effective thermal insulation properties while occupying less space, thus increasing the available glazing area without compromising energy efficiency.
3Stability of the object's composition
If non-shearing or shear-free insulating bars are used to accommodate thermal expansion, then the composite profile can deform without damage, but the moment of inertia is reduced and static load capacity is compromised
Solution Approach 1:
The insulating bar employs a dynamic design with sliding guides that enable controlled movement between sections. This dynamic structure accommodates thermal expansion through deliberate, guided motion rather than uncontrolled deformation, maintaining the moment of inertia and static load capacity while allowing for thermal adaptation.
Solution Approach 2:
The sliding guide acts as an intermediary mechanism between the insulating bar sections. It mediates the thermal expansion by providing a controlled path for movement, allowing the sections to shift relative to each other while maintaining structural integrity and preserving the moment of inertia of the overall composite profile.
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
The design enhances the rigidity and thermal insulation of composite profiles while maintaining structural integrity and fire protection, allowing for larger glazing areas with equivalent static requirements.
Implementation Method 1
shear stresses occur between the components of the composite profile when the temperature increases or decreases on one side, as occurs with seasonal changes
Implementation Method 2
shear stresses occur between the components of the composite profile when the temperature increases or decreases on one side
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
The invention relates to a composite profile (1) for doors, windows or other façade elements, comprising at least one first metal profile (2) and at least one second metal profile (4), between which metal profiles (2, 4) at least one intermediate metal profile (6) is provided, said first metal outer profile (2) being connected to the intermediate metal profile (6) in a first insulating web zone I via one or more insulating web(s) (8, 22), and said second metal profile (4) being connected to the intermediate profile (6) in a second insulating web zone II via one or more insulating web(s) (9, 22). The composite profile is characterised in that both the insulating web zones I, II have different shear strengths orthogonally in relation to the cross-sectional plane of the composite profile (1).