Six-Axis Rock Testing System for True Triaxial Stress Simulation
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Solution Overview
Problem
Current rock mechanical behavior testing systems for deep earth, deep space, and deep sea environments lack the capability to simulate true triaxial stress conditions and are limited by fixed, single-function designs, which hinders the development of resources and poses safety risks due to inadequate experimental setups.
Innovation Solution
A rock physico-mechanical testing system featuring a three-axis six-direction loading system with true triaxial stress loading mechanisms, allowing for multi-physical field and multi-parameter monitoring, and enabling experimental cabins with different functions to be integrated for real-time testing under varying environmental conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If uniaxial stress or axial-confining pressure testing is used, then the testing system is simple, but the stress state does not reflect true triaxial conditions and has large differences from actual engineering stress
Solution Approach 1:
The patent employs six independently controllable actuators that can dynamically adjust loading forces in three orthogonal directions, enabling the system to transition between different stress states (uniaxial, biaxial, triaxial) and accurately simulate true triaxial stress conditions that match actual engineering environments
Solution Approach 2:
The patent adds dimensional complexity by introducing six-directional loading capabilities (three directions with two actuators each) instead of traditional single-direction or axial-confining pressure setups, thereby achieving true triaxial stress state simulation that reflects complex in-situ stress conditions
2Device complexity
If a single, fixed, and closed loading system design is used, then the system structure is simple, but the experimental types are limited and cannot be butted with test cavities of different functions
Solution Approach 1:
The patent designs the loading system with universal interfaces and modular components that can accommodate different test cavity configurations and experimental requirements, allowing the same six-axis loading frame to perform multiple experimental types including true triaxial compression, shear tests, and other complex stress state experiments
Solution Approach 2:
The patent divides the loading system into separable modules (loading frame, actuators, test cavities, measurement systems) that can be independently configured and combined, enabling flexibility in designing different experimental setups while maintaining the core six-directional loading capability
3Device complexity
If conventional testing systems are used for deep earth resources, then the system is simple, but it cannot simulate high stress, high ground temperature, and high osmotic pressure conditions
Solution Approach 1:
The patent nests multiple environmental simulation systems within the six-axis loading frame, including temperature control chambers, pressure vessels, and fluid circulation systems, allowing simultaneous application of mechanical loads, thermal fields, and fluid pressures to comprehensively simulate deep earth conditions
Data Source
AI summary
The application relates to a rock physico-mechanical testing system in simulated environments of deep earth, deep space, and deep sea, which comprises a three-axis six-direction loading system and an experimental cabin, wherein the three-axis six-direction loading system comprises a loading frame and 6 actuators; an experimental cabin accommodation chamber is arranged in the loading frame, the experimental cabin accommodation chamber is provided with 6 loading ports, and six actuators are each adapted to one of the loading ports; the experimental cabin comprises a cabin body and 6 butting indenters, wherein the 6 butting indenters are respectively arranged in through holes of the cabin body in six directions and can axially move relative to the cabin body; and front ends of the six actuators are each operatively butted with a rear end of one of the butting indenters. The application can be used to achieve the reservoir rock mechanical behavior testing.