Radial deformation measuring device based on LVDT sensor

Abstract

The invention discloses a radial deformation measuring device based on an LVDT sensor. The device comprises an auxiliary tooling and a sensor device. The sensor device comprises a flexible iron wire,an LVDT coil, an LVDT core, a spring and a bolt. A sample is fixed between the flexible iron wire and the auxiliary tooling, one end of the flexible iron wire is connected to a bolt and is fixed on one side of the auxiliary tooling, the other end of the flexible iron wire is sequentially connected to the spring and the LVDT core in series and passes through the LVDT coil, and the LVDT coil is fixed to the other side of the auxiliary tooling. The device is simple to assemble, the radial deformation value can be effectively amplified, the measurement accuracy is improved, and the hoop strain ismeasured without affecting an explosive test.

Description

technical field

[0001] The invention relates to the technical field of mechanical properties of materials, in particular to a radial deformation measuring device based on an LVDT sensor. Background technique

[0002] In the test of material mechanical properties, including tension, compression, confining pressure stretching, confining pressure compression, etc., it is necessary to accurately measure its axial and radial deformation in order to accurately evaluate the mechanical properties of the material and build a mechanical model. The measurement of radial deformation is An important test content for determining the mechanical properties of explosives. Compared with the axial deformation, the radial deformation test is difficult to measure accurately due to factors such as small gauge length and small deformation. The existing radial test methods are divided into three types. One is to measure based on strain gauges, but it obtains point strain instead of global average ...

Images