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Multi-axis hydrostatic test device of porous material

A technology of porous materials and test devices, applied in the direction of applying stable tension/pressure to test the strength of materials, to achieve the effect of eliminating pressure effect errors

Inactive Publication Date: 2010-09-29
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Porous materials have excellent structural and functional properties. Multi-axial hydrostatic pressure test is an important way to measure the mechanical properties and constitutive relationship of porous materials. Due to many technical difficulties in loading and measurement under high hydraulic pressure environment, such as How to measure stress and strain, how to eliminate the influence of pressure effect on measuring equipment, how to solve the lead connection and sealing of measuring equipment, and how to seal porous material specimens, etc. At present, there is no mature and general multi-axis hydrostatic method for porous materials Pressure test device

Method used

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  • Multi-axis hydrostatic test device of porous material

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Embodiment Construction

[0012] The structural principle and working principle of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0013] refer to figure 1 , the present invention includes a hydraulic chamber 1, an upper cover 2, the hydraulic chamber 1 and the upper cover 2 are connected by bolts 3, the upper part of the upper cover 2 is equipped with a dust cover 5, and the upper cover 2 and the dust cover 5 are provided with an exhaust hole 8 , the exhaust hole 8 is sealed by the bolt 7 and the washer 9, the gap between the axial load piston rod 4 and the upper cover 2 is sealed by the standard assembly 6, and the porous material test piece sealing device 11 is placed on the load cell carrying platform 12 and added Between the force pistons 10, the load sensor 13 is installed on the lower bottom plate 15 with bolts 14, the lower bottom plate 15 is installed at the bottom of the inner wall of the hydraulic chamber 1 with bolts 16, and t...

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Abstract

The invention discloses a multi-axis hydrostatic test device of a porous material, wherein, the axial load of a multi-axis loaded hydrostatic test is exerted to a porous material test piece through a step-up piston by a material testing machine; hydrostatic test is provided by an external hydraulic source; the axial load born by the porous material test piece is measured by a shearing spoke-type load sensor in a hydraulic chamber; the axial deformation of the porous material test piece is measured by axial extensometers which are mounted at the two ends of a test piece sealing device; the axial extensometers are in the semi-toroidal shape; the load sensor and the axial extensometers adopt the Wheatstone full-bridge structure so as to eliminate the pressure effect error of a strain gauge caused by high hydraulic pressure; and the stress-strain curve of the porous material test piece in a multi-axis hydrostatic test can be obtained only by conversing the measured output of the Wheatstone bridges of the load sensor and the axial extensometers. Therefore, the device is applicable in multi-axis hydrostatic tests of various porous materials and solid materials.

Description

technical field [0001] The invention relates to a porous material multi-axis hydrostatic pressure test device, in particular to a porous material multi-axis hydrostatic pressure loading and stress-strain measurement device. Background technique [0002] Porous materials have excellent structural and functional properties. Multi-axial hydrostatic pressure test is an important way to measure the mechanical properties and constitutive relationship of porous materials. Due to many technical difficulties in loading and measurement under high hydraulic pressure environment, such as How to measure stress and strain, how to eliminate the influence of pressure effect on measuring equipment, how to solve the lead connection and sealing of measuring equipment, and how to seal porous material specimens, etc. At present, there is no mature and general multi-axis hydrostatic method for porous materials Pressure test device. Contents of the invention [0003] The purpose of the present ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/12
Inventor 冯勃徐明龙陈常青卢天健陈振茂
Owner XI AN JIAOTONG UNIV
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