A four-node strain gage roset assembly and method of using same

By monitoring the strain field changes on the surface of rock specimens using a four-node strain gauge device, the problem of capturing precursory information of rock failure was solved, and real-time monitoring and early warning of precursory rock failure were realized.

CN117168400BActive Publication Date: 2026-07-24WUHAN UNIV
View PDF 2 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
WUHAN UNIV
Filing Date
2023-08-29
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Without supporting monitoring devices for monitoring local strain fields in rocks, it is difficult to effectively capture and warn of precursory information about rock failure.

Method used

A four-node strain rosette assembly is designed, comprising four triaxial 45° strain rosettes. The installation position is determined by positioning crosshairs and positioning horizontal lines. A self-adhesive membrane design is adopted, and a static strain acquisition instrument is connected to monitor the strain field.

Benefits of technology

It enables real-time monitoring of the strain field on the surface of rock specimens, is applicable to specimens of various materials, is easy to install and has low cost, and is suitable for early warning of disasters such as earthquakes and landslides.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN117168400B_ABST
    Figure CN117168400B_ABST
Patent Text Reader

Abstract

The application discloses a four-node strain rosette group device and a use method thereof, and comprises four triaxial 45-degree strain rosettes, release paper, self-adhesive film, film frame, strain rosette lead, strain rosette group lead, lead joint, positioning cross mark and positioning horizontal line. The four triaxial 45-degree strain rosettes are distributed at four vertex positions of a square, and the installation position is determined by the positioning cross mark and the positioning horizontal line in the center of the square. Before installation, the release paper of the self-adhesive film of the device is torn off, the device is pressed on the surface of a test piece to be firmly adhered to the surface, the film frame is torn off, then the non-tension center film at the center position of the device is torn off along the broken line of the tear joint, the strain rosette group lead is connected to a static strain acquisition instrument, and a test signal can normally work. When loading starts, the measurement of the strain field is simultaneously started, test data are collected after loading is finished, and the change of the strain field is calculated according to a formula.
Need to check novelty before this filing date? Find Prior Art