Anisotropic Magnetorheological Elastomer Bending via Layered Particle Distribution
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Solution Overview
Problem
Anisotropic magnetorheological elastomer articles are difficult to manufacture and require complex processes to achieve a controlled anisotropic distribution of magnetic particles, leading to higher costs and potential attachment defects that can weaken the material under external stresses.
Innovation Solution
A single elastomer matrix with two adjacent layers, one active and one inactive to a magnetic field, where the layers are not attached, allowing for a simpler and more effective anisotropic response to magnetic fields by bending when a perpendicular field is applied, achieved through a manufacturing method involving a liquid elastomer, magnetic particles, and additives in a mold with an external force distributing the particles before solidification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple separately solidified magnetorheological elastomer blocks are assembled to achieve anisotropic distribution, then the anisotropic response to magnetic fields is improved, but the manufacturing complexity and potential attachment defects increase
Solution Approach 1:
The elastomer matrix is segmented into multiple layers with different magnetic particle concentrations during the single solidification process. The magnetic particles are distributed at different concentrations in different layers, creating anisotropic properties without requiring assembly of separate blocks. This resolves the contradiction by achieving segmented functional structure through a unified manufacturing process rather than assembling multiple components.
Solution Approach 2:
The invention merges the manufacturing of multiple layers with different magnetic particle concentrations into a single solidification process. Instead of separately solidifying and assembling multiple blocks, the liquid elastomer mixture is solidified once while magnetic particles are distributed at different concentrations in different regions, eliminating assembly steps and potential attachment defects.
2Manufacturing precision
If multiple separately solidified magnetorheological elastomer blocks are assembled to achieve anisotropic distribution, then the anisotropic response to magnetic fields is improved, but the material integrity under external stresses deteriorates due to attachment defects
Solution Approach 1:
The invention combines multiple layers with different magnetic particle concentrations into a single continuously solidified elastomer matrix. This eliminates the interfaces between separately assembled blocks that create attachment defects, thereby maintaining material integrity and reliability under external stresses while still achieving the desired anisotropic distribution of magnetic particles.
Solution Approach 2:
The single solidification process inherently prevents the formation of attachment defects by eliminating the need for assembling separate blocks. The magnetic particles are distributed at different concentrations in different layers during the same solidification event, preventing the creation of weak interfaces that would compromise material integrity under stress.
3Ease of manufacture
If a single elastomer matrix with two layers (active and inactive) is used, then the manufacturing process is simplified and costs are reduced, but the interaction with magnetic fields may be insufficient compared to multi-layer anisotropic structures
Solution Approach 1:
The elastomer matrix exhibits local quality variations with different magnetic particle concentrations in different layers. The first layer has a higher concentration of magnetic particles for strong magnetic interaction, while the second layer has a lower concentration for reduced interaction, allowing each region to be optimized for its specific function within a single unified structure.
Solution Approach 2:
The invention changes the concentration parameter of magnetic particles in different layers of the elastomer matrix. By varying the magnetic particle concentration from the first layer to the second layer during a single solidification process, the material achieves anisotropic properties with enhanced magnetic field interaction while maintaining manufacturing simplicity.
4Manufacturing precision
If traditional anisotropic magnetorheological elastomer articles are manufactured with multiple blocks, then the anisotropic response is enhanced, but the production time and costs increase
Solution Approach 1:
The invention merges multiple manufacturing steps (preparation of different blocks, solidification of each block, assembly, and attachment) into a single solidification process. The liquid elastomer mixture containing magnetic particles at different concentrations is solidified in one operation, dramatically reducing production time and improving productivity while maintaining controlled distribution of magnetic particles.
Solution Approach 2:
The magnetic particles are pre-distributed at different concentrations in the liquid elastomer mixture before solidification, eliminating the need for post-solidification assembly and adjustment. This preliminary distribution action during the liquid state enables efficient single-step manufacturing with high productivity while achieving the desired anisotropic structure.
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 approach simplifies the manufacturing process, reduces costs, and enhances the material's interaction with magnetic fields without weakening the integrity, enabling a significant change in properties with fewer layers and avoiding attachment defects, allowing for efficient bending in response to perpendicular magnetic fields.
Implementation Method 1
Magnetorheological elastomer (MRE) articles which comprise an elastomer matrix and magnetic particles distributed in the elastomer matrix and which, in the presence of a magnetic field, experience a change in rigidity and dimension due to the interaction between the magnetic particles which tend to be oriented in the direction of the external field applied
Implementation Method 2
a magnetic field applied during the manufacturing thereof
Implementation Method 3
an external force distributes the magnetic particles in the liquid elastomer before the solidification thereof ends
Implementation Method 4
The external force is a force selected from the group consisting of a gravitational force and a centrifugal force
Data Source
Figure 1~2
Figure 3~4
Figure 5~6B
AI summary
Anisotropic magnetorheological elastomer article comprising an elastomer matrix (1) and magnetic particles (2) distributed in the elastomer matrix (1). The article (10) is a plate formed by the elastomer matrix (1). The elastomer matrix (1) comprises a first layer (3a) with magnetic particles (2) and a second layer (3b) without magnetic particles (2), such that the article (10) is bent if a magnetic field is applied in a direction perpendicular to said article (10).