Adhesive Holder With Gap For Compressive Load Fixation
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Solution Overview
Problem
Conventional adhesive holders in vehicles face issues with peeling stress and structural damage due to high loads and vibrations, leading to unreliable fixation and potential separation from the structure.
Innovation Solution
The adhesive holder design incorporates an adapter and counter element with a defined gap, utilizing an adhesive layer to create a compressive load connection with the structural element, eliminating peeling stress and allowing for higher load-bearing capacity without damaging the structure, using multiple adhesive layers and spacers to absorb lateral motions and tensile stresses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If an adhesive holder is fixed on a structure by means of an adhesive connection, then the structure is not weakened by bore holes, but the holder may separate from the structure due to vibrations and peeling stress
Solution Approach 1:
The adhesive holder is divided into a multi-layer structure with at least two adhesive layers and intermediate layers. This segmentation distributes the mechanical loads across multiple interfaces, preventing stress concentration at a single adhesive bond line and eliminating peeling stress that causes separation in single-layer adhesive connections.
Solution Approach 2:
The holder employs a composite structure combining adhesive layers with intermediate layers of different materials properties. This composite design creates a gradient that manages stress distribution and prevents the peeling effect that occurs in homogeneous adhesive connections, while maintaining strong bonding to the structure.
2Strength
If the adhesive layer is dimensioned to withstand high loads, then the holding force increases, but the adhesive layer may damage the protective paint on the structure
Solution Approach 1:
The adhesive connection is segmented into multiple thin adhesive layers separated by intermediate layers. This distributes the shear and tensile stresses across multiple interfaces rather than concentrating them in a single thick adhesive layer, preventing the adhesive from pulling off or damaging the protective paint while maintaining high load-bearing capacity.
Solution Approach 2:
The design changes the thickness parameter of individual adhesive layers from thick to thin, with intermediate layers in between. This parameter modification reduces the stress concentration at the adhesive-paint interface while maintaining overall bonding strength through the cumulative effect of multiple layers.
3Reliability
If a mechanical fastening is used to achieve adequate holding force, then the reliability increases, but the structure is weakened due to required bore holes
Solution Approach 1:
The invention replaces the mechanical fastening system (screws, rivets requiring bore holes) with a multi-layer adhesive system. This substitution eliminates the need for bore holes that weaken the structure, while achieving comparable or superior reliability through the distributed bonding mechanism of multiple adhesive layers that resist vibration and peeling stress.
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 provides a reliable and durable fixation of objects on vehicles, capable of withstanding higher loads and vibrations, while preventing structural damage and ensuring the adhesive holder remains securely attached, even under varying stress conditions.
Implementation Method 1
the adhesive layer is in contact with the contact surface of the adapter and/or the counter surface of the counter element
Implementation Method 2
it not only may be subjected to high loads, but also easily and inexpensively manufactured and reliably fixed on a structure... a compressive load application always takes place in dependence on the rigidity
Data Source
AI summary
An adhesive holder for holding objects comprises an adhesive layer, an object holder, an adapter with a contact surface and a counter element with a counter surface. The counter surface of the counter element is positionable at a distance from the contact surface of the adapter in order to enclose a section of a structural element. The adhesive layer can be applied onto the contact surface of the adapter or onto the counter surface of the counter element. The adhesive holder according to the invention makes it possible to introduce a force into a structural element by exerting compressive stress and shearing stress only such that the adhesive connection is much more durable and the adhesive holder can be subjected to higher loads than in the state of the art.