Trapezoidal 3D Shock Absorber Structure for Stable Compression Load
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Solution Overview
Problem
Conventional shock absorbers made from elastic materials based on Schwartz P structures exhibit a rapid decrease in load when compressively deformed, which is not ideal for general use and can compromise wearing comfort when applied to shoe soles.
Innovation Solution
The shock absorber's unit structure body is transformed from a Schwartz P structure into a trapezoidal shape in the unloaded state, maintaining a stable load increase during deformation, enhancing shock absorption performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the shock absorber is made from elastic material based on Schwartz P structure, then shock absorption function is provided, but load rapidly decreases when compressive displacement reaches certain value
Solution Approach 1:
The invention changes the geometric parameters of the unit structure body by transforming it from a Schwartz P structure into a trapezoidal shape in the unloaded state. This parameter change modifies the deformation characteristics during compression, causing the load to gradually increase rather than rapidly decrease, thereby resolving the contradiction between maintaining shock absorption function and preserving load characteristics.
2Reliability
If shock absorber with rapid load decrease is used in shoe sole, then shock absorption is achieved, but wearing comfortableness is impaired
Solution Approach 1:
By transforming the unit structure body into a trapezoidal shape, the invention changes the load-displacement characteristics to provide gradual load increase during compression. This parameter modification maintains effective shock absorption while improving wearing comfortableness, as the gradual load increase provides a more comfortable sensation during walking or running.
3Stability of the object's composition
If unit structure body shape is changed to follow shape change into trapezoidal space, then stable load increase is maintained during deformation, but structural complexity increases
Solution Approach 1:
The invention applies asymmetry by transforming the symmetric Schwartz P structure into an asymmetric trapezoidal shape. This asymmetric configuration creates the desired load stability during deformation while maintaining manufacturing feasibility through additive manufacturing processes.
Solution Approach 2:
The invention modifies the geometric parameters of the unit structure body by changing it from a regular hexahedron-based Schwartz P structure to a trapezoidal configuration. This parameter change achieves stable load increase during compression while the complexity is managed through modern additive manufacturing capabilities.
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 improved shock absorption and wearing comfort by maintaining a stable load increase during deformation, making it suitable for shoe soles.
Implementation Method 1
the shock absorber made of an elastic material thickened based on a Schwartz P structure... has a property that a load rapidly decreases at a time point when compressive displacement reaches a certain value in a case where the shock absorber is compressively deformed
Data Source
Figure 1A~1B
Figure 2A~2D
Figure 3A~3B
AI summary
A shock absorber (1) includes a shock absorbing portion (10) having a three-dimensional shape formed by a wall (11) in which an outer shape is defined by a pair of parallel curved surfaces. The shock absorbing portion (10) includes at least one three-dimensional structure body (12) obtained by changing a shape of a unit structure body (U') thickened based on a unit structure of a Schwartz P structure. The shape of the three-dimensional structure body (12) in an unloaded state is a shape obtained by changing the shape of the unit structure (S') so as to follow the shape change of the unit structure body (U'), which is a regular hexahedron shaped space occupied by the unit structure body (U'), into a trapezoidal space.