Structural Reinforcement Inserts for Adhesive-Free Polymer Joining
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Solution Overview
Problem
There is a need for alternative carrier structures in automotive vehicles that combine different materials, which are chemically and physically compatible, to enhance modulus and flexural strength without the use of adhesives or mechanical fasteners, while allowing for localized reinforcement without additional structural features.
Innovation Solution
The use of fibrous composite materials with a distributed phase and a thermoset polymeric matrix, where the distributed phase includes fibers, platelets, or flakes, and a thermoset polymeric material as a matrix, which are combined through processes like extrusion or injection molding, allowing for continuous interface joining and localized reinforcement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If hybrid reinforcement structures with multiple materials are used to enhance modulus and flexural strength, then mechanical properties are improved, but the complexity of joining different materials increases
Solution Approach 1:
The patent employs materials that are chemically and physically compatible with each other, allowing them to be joined without adhesives or mechanical fasteners. The dissimilar materials are selected to have compatible surface energies and chemical properties, enabling direct bonding through melting and fusion processes, thereby simplifying the joining complexity while maintaining enhanced mechanical properties.
Solution Approach 2:
The patent uses a polymeric material layer as an intermediary between dissimilar materials, facilitating their joining. This intermediate layer is chemically compatible with both materials and enables bonding through melting and fusion, eliminating the need for complex adhesive systems or mechanical fasteners while achieving the desired mechanical properties.
2Strength
If multiple different materials are combined in hybrid structures, then mechanical properties are enhanced, but the need for adhesives or mechanical fasteners increases complexity
Solution Approach 1:
The patent changes the physical state of the polymeric material from solid to molten state during processing, allowing dissimilar materials to be joined through melting and fusion. This parameter change enables direct bonding without adhesives or mechanical fasteners, simplifying manufacturing while achieving enhanced mechanical properties through hybrid material combinations.
3Strength
If structural reinforcements are added to cavities, then mechanical strength is improved, but the weight of the structure increases
Solution Approach 1:
The patent uses composite materials consisting of dissimilar polymeric materials that are chemically compatible. These composites provide enhanced mechanical strength and stiffness compared to single-material structures, allowing for weight reduction opportunities while meeting structural requirements. The composite nature allows optimization of strength-to-weight ratio.
4Weight of moving object
If sections are thinned to reduce weight, then weight is reduced, but structural strength is weakened
Solution Approach 1:
The patent employs composite materials with dissimilar polymeric materials that provide enhanced mechanical properties per unit weight. The chemical compatibility of the materials allows for effective load transfer and stress distribution, enabling thinner sections to achieve the required structural strength that would otherwise require thicker single-material sections.
Solution Approach 2:
The patent applies hybrid material combinations and structural reinforcements at specific locations where strength is required, rather than uniformly throughout the entire structure. This localized application of enhanced materials allows for weight reduction in non-critical areas while maintaining structural integrity in load-bearing regions.
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 composite materials provide enhanced mechanical properties, including increased modulus and flexural strength, while being compatible and joinable without adhesives, suitable for structural reinforcement and baffling applications.
Implementation Method 1
the dissimilar materials are compatible and joinable without the use of an adhesive, a mechanical fastener, or other means for physically joining two or more different materials
Implementation Method 2
combined through processes like extrusion or injection molding, allowing for continuous interface joining
Implementation Method 3
fibrous composite materials with a distributed phase and a thermoset polymeric matrix, where the distributed phase includes fibers, platelets, or flakes
Data Source
AI summary
A structural reinforcement for an article including a carrier (10) that includes: (i) a mass of polymeric material (12) having an outer surface; and (ii) at least one fibrous composite insert (14) or overlay (960) having an outer surface and including at least one elongated fiber arrangement (e.g., having a plurality of ordered fibers). The fibrous insert (14) or overlay (960) is envisioned to adjoin the mass of the polymeric material in a predetermined location for carrying a predetermined load that is subjected upon the predetermined location (thereby effectively providing localized reinforcement to that predetermined location). The fibrous insert (14) or overlay (960) and the mass of polymeric material (12) are of compatible materials, structures or both, for allowing the fibrous insert or overlay to be at least partially joined to the mass of the polymeric material. Disposed upon at least a portion of the carrier (10) may be a mass of activatable material (126). The fibrous insert (14) or overlay (960) may include a polymeric matrix.