Rapid pressure-bearing forming device and method for physical similar material test piece

Abstract

The invention discloses a rapid pressure-bearing forming device and method for a physical similar material test piece. The device comprises a strain gauge and a horizontally arranged lower flat plate.Four guide columns are arranged on an upper surface of the lower flat plate in a rectangular array, a hydraulic jack is arranged on the lower flat plate, the four guide columns are sleeved with a middle flat plate in a sliding mode, an upper flat plate is arranged at upper ends of the four guide columns, each guide column is sleeved with a compression spring located between the upper flat plate and the middle flat plate, a test piece forming die is placed on the middle flat plate, a lower surface of the upper flat plate is connected with a pressure sensor, and the pressure sensor is connectedwith a strain gauge through a lead. The forming pressure, the forming density and the forming time of a test piece can be accurately controlled, the forming conditions of the similar material test piece are accurately controlled by controlling the size of the similar material test piece, the density uniformity of the similar material test piece is improved, and the dispersion of the shape of thetest piece is reduced. Therefore, the die has the capability of manufacturing the high-density similar material test piece.

Description

Technical field [0001] The invention belongs to the technical field of similar material testing, and specifically relates to a rapid pressure-bearing forming device and a forming method of a physically similar material test piece. Background technique [0002] Physical similarity simulation experiment is an important method for the research of mines, underground space and other geotechnical problems. Reasonable similarity simulation test requires the model to satisfy geometric similarity, dynamic similarity and motion similarity. Similarity simulation dynamic similarity is the key to whether the similarity simulation test is reasonable, and its main content is to require the mechanical properties of similar materials to meet the test requirements. Making standard specimens of similar materials and measuring their mechanical parameters is the main method to determine the mechanical properties of similar materials. [0003] In order to study the influence of similar material ratio ...

AI Technical Summary

Problems solved by technology

[0007] 3) The pressure source for forming the test piece is generally manpower, the error of the pressing process is high, and the production efficiency is low;

[0008] 4) The current molds for similar material specimens generally use manual compaction, which makes it difficult to make high-density similar material specimens;

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