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Hydraulic mechanical property measurement device for composite load loading mode material

TL;DR: In this article, a hydraulic mechanical property measurement device provided by the utility model provides a research means for the mechanical property of the material in combination forms of tensile stress and shear stress with different angles.
Abstract: The utility model relates to a hydraulic mechanical property measurement device for a composite load loading mode material, and belongs to the field of machinery. The hydraulic mechanical property measurement device comprises a hydraulic drive and control unit, a specimen holding unit, a signal detection unit and a supporting unit. A uniaxial tensile test, a pure shear test and a tensile/shear composite load test mode with any angle can be realized, and an ultra-low-speed static loading conversion mode can be realized by combining the precise flow control of a servo drive control unit. The hydraulic mechanical property measurement device provided by the utility model provides a research means for the mechanical property of the material in combination forms of tensile stress and shear stress with different angles. Meanwhile, the measurement device and an optical microscopy imaging component have good structural compatibility, the measurement device can be combined with an imaging system to be used for on-line observation of a process that the material is damaged by deformation until the material is destructed by failure, and the in-depth research of the micro-mechanical behavior of the material is carried out.
Citations
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Patent
03 Feb 2016
TL;DR: In this paper, a stress-strain information measurement device and method for a thin-walled tube, in particular to a bidirectional stress state stressstrain measurement device, was presented.
Abstract: The invention relates to a stress-strain information measurement device and method for a thin-walled tube, in particular to a bidirectional stress state stress-strain measurement device and method for a thin-walled tube. The device and method are used for solving the problems that according to an existing device and method, accurate control over a stress path and accurate measurement of stress-strain information can not be achieved in a bidirectional stress state of the thin-walled tube, and the accurate stress-strain information can not be obtained when the thin-walled tube is in the bidirectional stress state. The device comprises a base, a strain gage, a movable beam, a pump station, an oil pressure booster, a force sensor, a pressure sensor, a control system, two upper chucks, two lower chucks, two lead screw pairs and two motors, wherein the two motors are installed on the base in parallel, and one lead screw pair is fixedly installed at the output end of each motor. The measurement method includes the main steps that firstly, the thin-walled tube is selected; secondly, the two ends of the thin-walled tube are fixed and sealed; thirdly, a bidirectional stress-strain experiment is started; fourthly, the stress-strain information is detected; fifthly, the thin-walled tube is broken, and experimental data are saved.

11 citations

Patent
02 Oct 2013
TL;DR: In this article, the authors proposed an in-situ testing device for micro-mechanical properties of materials under a tension-shear combined loading mode, which belongs to the test field of mechanical properties.
Abstract: The invention relates to an in-situ testing device for micro-mechanical properties of materials under a tension-shear combined loading mode, and belongs to the in-situ test field of mechanical properties. A tension module and a shear module are composed of a motor power assembly, a transmission and execution assembly, a clamping support assembly, a signal detection and control assembly respectively. The shear module also comprises a piezoelectric driving assembly capable of applying high-frequency shear fatigue loading. A coreless rotor direct-current motor is connected with a planetary gear reducer and is connected with a precision bi-directional ball screw through a worm and gear transmission component; and square nuts connected with the ball screw nuts are supported and guided through guide rails at the two sides. Two loadings are respectively collect force and displacement signals by a precision force sensor and a linear motor power assembly potentiometer. The in-situ testing device is smart in size, compact in structure and high in test precision, can realize the tests of tension and shear loadings at different strain rates and stress ratios, and can be compatible with loading platforms of microscopic imaging equipment such as metallographic microscopes and the like.

8 citations

Patent
13 Aug 2014
TL;DR: In this paper, a cross-scale micro-nano-scale in-situ shearing mechanical performance testing platform is presented, consisting of a precise driving unit, transmission and execution unit, signal control and detection unit and a connecting and supporting unit.
Abstract: The invention relates to a cross-scale micro-nano-scale in-situ shearing mechanical performance testing platform, belonging to the field of in-situ shearing mechanical performance tests. The cross-scale micro-nano-scale in-situ shearing mechanical performance testing platform structurally comprises a precise driving unit, a transmission and execution unit, a signal control and detection unit and a connecting and supporting unit, wherein a brushless direct current servo motor is connected with a primary worm, is connected with a secondary worm shaft by a primary worm and gear transmission pair, and then is connected with a precision ball screw I by a secondary worm and gear transmission pair. The cross-scale micro-nano-scale in-situ shearing mechanical performance testing platform has the advantages of being small in size, light in weight, high in rigidity, compact in structure and high in testing precision, and being capable of providing rich testing contents, and being compatible with carrying platforms of vacuum cavities of various electron microscopes, thereby providing novel testing measures for analytical investigation of a material deformation damage mechanism under an approximate serving condition.

4 citations

Patent
29 Aug 2017
TL;DR: In this paper, a comprehensive geotechnical engineering test platform for complex slope geological model tests is presented, which consists of a test platform framework, an angle control device, a loading system and a loading control device.
Abstract: The invention discloses a comprehensive geotechnical engineering test platform for complex slope geological model tests. The comprehensive geotechnical engineering test platform comprises a test platform framework, an angle control device, a loading system and a loading control device, wherein the test platform framework is used for forming a complex slope geological model, the angle control device is used for controlling test platform framework angle change, the loading system is used for perform pressure loading on the complex slope geological model and the loading control device is used for controlling the loading system, and a combined retaining plate is laid on the test platform framework. The comprehensive geotechnical engineering test platform has the advantages that a plurality of sub-frames can form a single linear slide structural face, a double-broken-line slide structural face and two intersecting slide structural faces with inclination-angle-opposite included angles, the inclination angles of the formed structural faces can be adjusted optionally, the deformation and fracture researches of complex single structural face slide rock slip mass, double-broken-line structural face slide rock slip mass and wedge-shaped rock slip mass with or without reinforcing protecting structures can be achieved, and precise adjustment of test platform framework angle change and loading pressure during the tests can be achieved.

2 citations

Patent
06 May 2015
TL;DR: In this article, a rock micro/nano mechanical testing method is described, where a fixed part matched with and fixed together with the loading end of mechanical loading testing equipment is processed by the testing fixture.
Abstract: The invention discloses a rock micro/nano mechanical testing method, a rock micro/nano mechanical testing system and a rock micro/nano mechanical testing fixture The testing method comprises the following steps: preprocessing the testing fixture, and prefabricating a rock test sample according to different testing conditions and research purposes, wherein a fixed part matched with and fixed together with the loading end of mechanical loading testing equipment is processed by the testing fixture; fixing the rock test sample on the testing fixture, and fixing the fixed parts of the testing fixture to the loading end of the testing equipment; and applying a simulated load to the testing fixture, and transmitting the simulated load to the rock test sample via the testing fixture According to the method, the testing fixture is matched with and fixed together with the loading end of the testing equipment, and a complex matching structure does not need to be processed on the rock test sample, so that the difficulty in preparation of a rock test sample conforming to testing conditions is greatly lowered; and the rock test sample can be conveniently connected with the loading testing equipment by virtue of the testing fixture, so that the efficiency of rock micro/nano mechanical testing is improved

2 citations