Stacked Ring Shear Assembly with Rolling Protective Groove
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Solution Overview
Problem
Conventional simple shear equipment faces challenges in sample preparation and tangential displacement measurement due to large stacked ring horizontal displacement, which can lead to the stacked ring group overturning.
Innovation Solution
A simple shear assembly for three-dimensional geotechnical testing equipment is designed, featuring a base plate with a stacked ring group that includes sliding stacked rings with a mounting frame and holding frame. The mounting frame has a support portion and a protective portion with a limiting groove and rolling surface, allowing the stacked rings to freely stagger and preventing overturning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If the stacked rings are allowed to slide freely relative to each other to achieve uniform stress distribution, then the stress and strain distribution becomes more uniform, but the stacked ring group may overturn due to large horizontal displacement
Solution Approach 1:
The protective portion is segmented into multiple functional elements: limiting groove for horizontal constraint, rolling surface for controlled movement, and support portion for structural stability. This segmentation allows each element to perform its specific function in preventing overturning while maintaining stress distribution uniformity.
Solution Approach 2:
The rolling surface acts as an intermediary between the support portion and the limiting groove, enabling controlled horizontal movement through rolling motion. This intermediary mechanism allows the stacked rings to slide freely for uniform stress distribution while the rolling surface prevents excessive displacement that would cause overturning.
2Stability of the object's composition
If the stacked rings are constrained to prevent overturning, then the stability of the stacked ring group is improved, but the ability to distinguish between sliding displacement and tangential displacement is reduced
Solution Approach 1:
The protective portion transitions from a static constraint structure to a dynamic system where the rolling surface enables controlled movement. The rolling mechanism dynamically adapts to the displacement magnitude, allowing free rolling for small displacements (maintaining measurement precision) while providing constraint for large displacements (preventing overturning).
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 solution effectively addresses the issues of sample preparation and tangential displacement measurement by allowing free sliding of stacked rings while preventing overturning, resulting in more uniform stress and strain distribution during geotechnical testing.
Implementation Method 1
a support portion of an above adjacent stacked ring is rolled and supported on the rolling surface
Data Source
AI summary
A simple shear assembly includes: a base plate detachably mounted on a loading platform, and a stacked ring group opposite to the base plate; wherein the stacked ring group comprises: a plurality of stacked rings capable of sliding relative to each other; each of the stacked rings comprises a mounting frame and a holding frame provided within the mounting frame; the mounting frame comprises a support portion and a protective portion fixed to a top part of the support portion; the protective portion comprises a limiting groove and a rolling surface provided in the limiting groove; a support portion of an above adjacent stacked ring is rolled and supported on the rolling surface, in such a manner that all the stacked rings freely stagger with each other to perform interface simple shear. The protective portion can prevent the stacked rings from overturning.