A concrete flexural strength test press and control method
By working in concert with the magnetorheological loading section and the self-compensating lateral pressure section, the problems of stress concentration and displacement distortion at the loading end were solved, and accurate data acquisition for concrete flexural strength tests was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- BAOJI TONGDA ROAD & BRIDGE CO LTD
- Filing Date
- 2026-06-11
- Publication Date
- 2026-07-17
AI Technical Summary
In existing concrete flexural strength tests, the rigid indenter at the loading end is prone to stress concentration and the flexible padding layer leads to displacement distortion, which cannot accurately reflect the true flexural mechanical properties of the specimen.
The magnetorheological loading unit and the self-compensating lateral pressure unit work together. The magnetorheological loading head conforms to the concrete surface in a low stiffness state and transforms into a high stiffness force transmission during loading. The horizontal extrusion push rod driven by the V-shaped double linkage counteracts the lateral expansion. Combined with the controller, the stiffness of the magnetorheological fluid is dynamically adjusted to capture the characteristics of microcrack initiation.
It achieves stable bonding and high stiffness force transmission at the loading end under low stiffness conditions, accurately captures the initiation of microcracks, obtains more accurate data on the flexural mechanical properties of materials, and avoids stress concentration and displacement distortion.
Smart Images
Figure CN122409348A_ABST