A core triaxial direct tension mechanical testing device under in-situ multi-field coupling environment

By designing a triaxial direct tensile mechanical testing device for rock cores that integrates pressure-tension conversion and multi-field coupling simulation, the problem of not being able to conduct direct tensile tests on rocks under confining pressure conditions in existing technologies has been solved. This device enables accurate testing and multi-parameter monitoring under multi-field coupling conditions, improving the adaptability and reliability of the test.

CN122409367APending Publication Date: 2026-07-17SHENZHEN UNIV

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHENZHEN UNIV
Filing Date
2026-04-21
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing triaxial testing equipment cannot conduct direct tensile tests on rocks under confining pressure, cannot simulate in-situ multi-field coupling environments, and lacks the ability to monitor multiple parameters simultaneously, making it difficult to conduct in-depth research on rock tensile characteristics and fracture evolution mechanisms.

Method used

A triaxial direct tensile mechanical testing device for rock cores under in-situ multi-field coupling environment was designed. It integrates pressure-tensile conversion, seepage, and temperature control modules, and can conduct direct tensile tests on rock cores under confining pressure conditions, while simultaneously monitoring mechanical, acoustic, and seepage parameters.

Benefits of technology

It realizes direct tensile loading of rock under confining pressure conditions, simulates the multi-field coupling environment of deep strata, provides synchronous monitoring of multi-dimensional parameters, improves the accuracy and adaptability of the experiment, and reduces the modification cost.

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Abstract

本发明涉及一种原位多场耦合环境下岩芯三轴直接拉伸力学测试装置,包括外部承载框架、试件夹持装置、辅助测量部件和保温隔热外壳;外部承载框架包括能将上压力转换为下拉力的上部拉伸框架,及能将下压力转换为上拉力的下部拉伸底座;试件夹持装置包括能夹持试样上端的上拉伸头及能夹持试样下端的下拉伸头;辅助测量部件包括轴向拉伸变形和径向变形的位移传感模块及提供温度场的温控模块。本申请可直接适配三轴压力室并可实现围压条件下岩芯的直接拉伸加载,并能模拟深部地层热‑流‑力多场耦合的原位环境,同步获取岩芯拉伸过程中的力学、声学、渗流、变形等多维度参数,利于实现岩石在原位多场耦合环境下拉伸力学特性的精准测试。
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