A dual-axis compression clamping device based on arc steering

By designing a biaxial compression clamping device with an arc-shaped steering mechanism, the problems of high cost and uneven loading of existing equipment were solved, enabling high-precision biaxial stress simulation on a uniaxial testing machine, simplifying operation and improving the accuracy of test results.

CN122108748APending Publication Date: 2026-05-29SICHUAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SICHUAN UNIV
Filing Date
2026-02-06
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing biaxial compression testing equipment is expensive to purchase, complex to maintain, and difficult to operate. Furthermore, it is difficult to achieve bidirectional equal stiffness loading on ordinary uniaxial testing machines, which leads to distortion of specimen boundary conditions and affects the accuracy of test results.

Method used

A biaxial compression clamping device based on arc-shaped steering is designed. By constructing a two-level geometric constraint system of "internal force decomposition + external dynamic control", the unidirectional pressure of the uniaxial testing machine is stably decomposed into biaxial orthogonal compressive force. The rolling components and arc-shaped structure are used to realize the flexible adjustment and uniform transmission of load, avoiding the distortion of boundary conditions caused by friction and non-uniform loading.

Benefits of technology

It enables high-precision biaxial stress state simulation on a uniaxial testing machine, simplifies the operation process, reduces costs, improves the accuracy and reliability of test results, and expands the applicability of the uniaxial testing machine.

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Abstract

The application belongs to the technical field of rock mechanics test, and particularly relates to a biaxial compression clamping device based on arc turning, which comprises symmetrically arranged upper loading assemblies and lower loading assemblies, and each of the upper loading assemblies and the lower loading assemblies comprises a loading block, a force transmission block and a clamping block. The force transmission block is connected with the bottom surface of the loading block through a first rolling assembly, and the bottom of the force transmission block is provided with a circular arc surface. The clamping block is arranged below the force transmission block, the top of the clamping block is in sliding connection with the circular arc surface, the inner side of the clamping block is provided with a jaw for clamping a test piece, the inner side of the jaw is provided with an antifriction plate, and the antifriction plate is connected with the clamping block through a second rolling assembly. Through the cooperative action of the upper loading assemblies and the lower loading assemblies, the device can apply bidirectional adjustable compression load to the test piece under the driving of uniaxial pressure, not only can the uniaxial testing machine simulate complex biaxial stress state, but also can effectively isolate the interference of test piece deformation on the load transmission path through multi-stage rolling antifriction.
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