Stress path automatic controlling triaxial apparatus

A technology of stress path and triaxial instrument, which is applied in the direction of testing the strength of materials by applying stable shear force, can solve the problems of automatic control of stress path, inconvenient continuous change, and inability to carry out stress control experiments, etc., to achieve measurement and The effect of automatic collection process

Inactive Publication Date: 2012-02-15
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

[0004] However, the general conventional triaxial instrument has its limitations: it can only perform strain control experiments, and the motor drives the pressure chamber to rise at a certain rate to achieve axial stress loading, and cannot perform s

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  • Stress path automatic controlling triaxial apparatus
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Embodiment Construction

[0030] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings: this embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following the described embodiment.

[0031] Please refer to figure 1 , figure 1 Shown is a schematic diagram of the structure of the stress path automatic control triaxial apparatus in a preferred embodiment of the present invention. The present invention proposes a stress path automatic control triaxial instrument, which is applied in the field of civil engineering, including: a pressure control device 1, a data measurement and acquisition device 2, a triaxial instrument 3 and a microcomputer 4; wherein, the pressure control device 1 The input end is connected with the microcomputer 4, the output end ...

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Abstract

The invention discloses a stress path automatic controlling triaxial apparatus comprising a pressure controlling device, a data measuring and collecting apparatus, a common triaxial apparatus, and a microcomputer. An input terminal of the pressure controlling device is connected to the microcomputer. An output terminal of the pressure controlling device is connected to the common triaxial apparatus for transmitting pressure load. An input terminal of the data measuring and collecting apparatus is connected to the common triaxial apparatus for transmitting analogue signals of displacement, pressure, and volume change. An output terminal of the data measuring and collecting apparatus is connected to the microcomputer for recording data. According to the invention, on a basis of a common triaxial apparatus, a function of a stress path automatic controlling experiment is realized, such that complicated stress path experiments can be carried out. With an additional axial pressurizing cylinder, a tensile experiment can be carried out by using the common triaxial apparatus. During an experiment process, ambient pressure and axial pressure can change automatically, and the measuring and collecting processes of the data are automatic. Therefore, the apparatus provided by the invention is characterized in enhanced function and simple operation.

Description

technical field [0001] The invention relates to a device in the field of civil engineering indoor test technology, and in particular to a stress path automatic control triaxial instrument. Background technique [0002] When establishing the constitutive model of soil, the plastic yield surface equation must be determined first. The stress path test is an important means to obtain the plastic yield surface, and the test equipment is required to be able to automatically control the load to obtain various stress paths that meet the requirements. [0003] The most commonly used instrument matrix in stress path testing is a conventional triaxial instrument. The conventional triaxial instrument is mainly used to measure the strength index, stress-strain relationship and stress path of soil. It is an intuitive, simple, reliable and effective experimental equipment. Since its successful development in 1930, after more than 70 years of development, it has been widely used in the fi...

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Application Information

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IPC IPC(8): G01N3/24
Inventor 盛佳韧叶冠林王建华
Owner SHANGHAI JIAO TONG UNIV
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