632results about "Investigating material ductility" patented technology

A spectroscopy system is provided which is optimized for operation in the VUV region and capable of performing well in the DUV-NIR region. Additionally, the system incorporates an optical module which presents selectable sources and detectors optimized for use in the VUV and DUV-NIR. As well, the optical module provides common delivery and collection optics to enable measurements in both spectral regions to be collected using similar spot properties. The module also provides a means of quickly referencing measured data so as to ensure that highly repeatable results are achieved. The module further provides a controlled environment between the VUV source, sample chamber and VUV detector which acts to limit in a repeatable manner the absorption of VUV photons. The use of broad band data sets which encompass VUV wavelengths, in addition to the DUV-NIR wavelengths enables a greater variety of materials to be meaningfully characterized. Array based detection instrumentation may be exploited to permit the simultaneous collection of larger wavelength regions.

The invention relates to a high-temperature comprehensive property evaluation experimental device of a sealing spacer, comprising a spacer loading system, a flange lifting separation system, a spacerdeformation measuring system, a heating and temperature control measuring system, a cooling heat insulation system, a medium setting system, a medium sealing and leakage rate measuring system and a data acquisition system. The invention has the advantages of high parameter, convenient experiment, compact structure of a whole experimental machine, small occupying area, and the like, takes a low-pressure area as a leakage measuring cavity, enhances the measuring precision of the pressure of the leakage measuring cavity and also effectively avoids the problem of pipeline leakage caused by takinga high-pressure area as a leakage cavity so that the measurement of the sealing property of the spacer is more accurate; and in addition, the flange lifting separation system can solve the problem ofthe difficult bonding and separation of the high-temperature experimental spacer and a flange.

The invention discloses a miniature specimen creep test system and a miniature specimen creep test method which can control a test environment. The system comprises a host frame, a high-temperature furnace, a servo motor loading device, a distance measuring device, a force measuring device, a cooling system, a clamping mechanism, a quartz tube and an air supply device, wherein the servo motor loading device is arranged at the bottom of the host frame; the force measuring device is connected with the servo motor loading device and is arranged above the servo motor loading device; a sensing head of the distance measuring device is sleeved between a force sensor and the cooling system; the cooling system is arranged above the force sensor; the clamping mechanism is arranged above the cooling system and passes through the quartz tube; the upper end of the clamping mechanism is fixed at the upper end of the host frame; the high-temperature furnace is sleeved out of the quartz tube; and the air supply device can convey air into the space formed by the clamping mechanism and the quartz tube through an air inlet tube. In the system and the method, fewer materials are taken; three-point bending, four-point bending and a small-punch creep test can be performed in various gaseous environments; the high-temperature mechanical property of a material under actual working conditions can be met; and the overall precision is high.

The invention discloses a loaded coal rock constant pressure gas adsorption desorption testing system and a method thereof. The system comprises a gravity constant pressure device, a vacuum pump, a high pressure gas cylinder, a constant pressure gas tank, a sample tank, a gravity constant hydraulic device and a hand pump. The method can be used for carrying out following gas adsorption and desorption tests on a coal sample under different external loading pressures and different gas pressures: 1) studying the change of absorption characteristics caused by the damage of coal rocks under different loading effects, and studying the change rules of adsorption constant, adsorption quantity and the like with the load; 2) studying the gas desorption process of coal rocks containing gas under different loading situations; 3) studying the adsorption process and adsorption constant of coal rocks containing gas with different particle sizes under constant gas pressure; 4) studying gas desorptionprocess and rules of coal rocks containing gas with different particle sizes under different atmosphere pressures; and 5) studying the creep mechanical properties of the coal rocks containing gas in gas adsorption and desorption process.

The invention relates to the research field of asphalt pavement materials and structures in highway engineering, and discloses a torsional shear test device for asphalt pavement materials and structures, which is characterized in that it includes a machine base, a reaction force frame arranged on the machine base, and a The worm gear mechanism at the bottom of the reaction force frame, the worm input end of the worm gear mechanism is connected to the pressure motor, the output end of the worm gear is connected to the lower support plate for clamping the test piece, and the pressure sensor is arranged on the lower support plate; the reaction force frame A torque motor is arranged on the top, and the output shaft of the torque motor is connected downwards to the disc torque sensor and the upper support plate for clamping the specimen in turn.

The invention provides a device for testing gas seepage and creepage coupling action of rocks. The device comprises an upper seat, a lower seat, a motor oil pump, a high-pressure nitrogen cylinder and an oil pump, wherein the upper seat is connected with the lower seat; a gas cavity with honeycomb-shaped gas holes is connected to each of the upper seat and the lower seat; the gas cavity which is provided with the honeycomb-shaped gas holes and connected with the upper seat is connected with an outlet pipe; the gas cavity which is provided with the honeycomb-shaped gas holes and connected with the lower seat is connected with a gas inlet pipe; the lower seat and the gas cavity which is provided with the honeycomb-shaped gas holes and connected with the lower seat are connected with a carrying plate; the carrying plate is connected with a loading oil cylinder through a pressurization piston rod; the motor oil pump is connected with the loading oil cylinder; the high-pressure nitrogen cylinder is connected with the gas inlet pipe; and the oil pump is connected with the oil cylinder and a triaxial cavity. The device can be used for performing a gas seepage and creepage coupling test on the rocks under different stress levels and different gas seepage pressures, so that the creepage test for a rock sample can be finished successfully under constant stress; and data is real and reliable.

The invention relates to a film-stretching loading device in scanning microscope environment and a film-deformation measuring method in the field of microscope scanning nondestructive inspection and precision machine. The device uses the designed mechanic structure, pressure ceramic driving system, force buffer system and so on which can do three-space location and angle adjustment to finish film deformation measuring on atom force scanning microscope and electron beam microscope detecting table. It can dose quantity detecting to deformation field of all region or localized region of the micro size film; the thickness of the detected film is from several micrometers to sub-micros; it can finish film original location and on line detecting under the high spacing resolution microscope atom force scanning microscope or electron beam scanning microscope environment combined with the double-exposure digital spot technique, the image related technique or micro-labeling technique.

The invention discloses a method for measuring high-temperature creep crack growth threshold value of material. The method comprises the following steps of: for a specific material, according to the creep crack growth test requirement, processing at least 6 standard compact tension specimens, performing crack prefabrication for the well processed at least 6 specimens on a fatigue performance tester, wherein the prefabricated crack length is 0.5 times of the width of each specimen; wedging a wedge-shaped block into an initial notch of each specimen, placing the headmost end of the straight part of the wedge-shaped block at the position of a loading line, providing displacement for the loading line, forming a stress-strain field characterized by a stress strength factor at the tip of the specimen crack, and providing a driving force for the creep crack growth, wherein the specimens with different initial stress strength factors grow after certain time under creep effect in high-temperature environment, and in the same time interval, the crack growth lengths are different; drawing for the different stress strength factors and the corresponding crack growth rates, and solving the creep crack growth threshold value of the material through an extrapolation method. According to the method provided by the invention, multiple specimens can be tested for one time, and thus, the test cost is greatly reduced and the test time is greatly shortened.

The invention provides a film single-shaft bidirectional tensing mechanism and a measuring method for the deformation in the film, and pertains to the field of precision machinery. The mechanism uses two piezoelectric ceramics 8 to push from two directions respectively a slider 4 and an adjustable slider 3 that can move along a slideway 2, between the slider 4/the adjustable slider 3 and a support 1, limit springs 9 are used for limiting; on the slider 4 and the adjustable slider 3, a force sensing arm 6 is fixedly connected respectively; the top of the force sensing arm 6 is connected with a stage. At measuring, first a film specimen to be measured is clamped on the stage; then the piezoelectric ceramics 8 are applied with voltage continuously, so that the two force sensing arms 6 will have mini displacement opposite to each other; meanwhile, the images and mechanic parameters of the film deformation are recorded by a real-time acquisition system and stress pieces 5 attached on the force sensing arms 6. By the invention, the measuring area can be observed continuously, and measurement of wider range can be carried out by force sensing arms of different measuring ranges.

The invention discloses a concrete axis stretching creep tester and a test method thereof. The tester comprises an upper pulling plate, a lower pulling plate, pulling bars, screws, a spring, a stress sensor and vibrating string extensometers, the pulling bars are fixed on the lower pulling plate, and the upper ends of the pulling bars are provided with thread ends; the upper pulling plate traverses the upper ends of the pulling bars and is sleeved on the thread ends, and the thread ends at the upper and lower sides of the upper pulling plate are provided with nuts to fix the upper pulling plate; the upper and lower pulling plates are provided with the screws respectively and are used for the fixed connection of the upper and lower end of a concrete test piece, and the vibrating string extensometers are arranged at two sides of the concrete test piece; and the screw on the upper pulling plate stretches out of the upper pulling plate, the spring is sleeved on the stretching end of the screw, the stretching screw is also sequentially sleeved with a pad and a nut, and the stress sensor is arranged between the pad and the nut. The tester and the method realize the continuous automatic detection and acquisition of deformation; and no eccentricity, concentrated stress and constant stress are realized in the stretching process, so the test accuracy is improved.

The invention relates to a method for testing the mechanical of the steel plate on line when rolling, providing a comprehensiveness on-line predicting method based on the physico-metallurgy model and combined with the database, information technology through setting up a corresponding model of microscopic structure, finished size, art component to the mechanical. The method including the following steps: (a) selecting and confirming the parameter of the model; (b) setting up the real-time traffic to the processing machine, calling the art parameter and alloying component dynamic data from the processing database; (c) predicting the ferrite grain size and temperature (d) predicting mechanical of the finished plate. The invention is used specially for low-carbon steel and mini alloyed steel, the adaptive process is heavy and medium plate mill or big mill and finisher in rolling process.

The invention provides a triaxial compression rheological test system capable of simulating an engineering geological environment, belonging to rock material compression experimental facilities. The remarkable characteristics of the invention are as follows: a test chamber in the triaxial compression rheological test system capable of simulating the engineering geological environment can depend on a normal rheological compression test device to realize the analogue simulation of the variations of a temperature field, a humidity field and a chemical field in the engineering geological environment by utilizing a humidifier, a heater and a fluid tank. The device fundamentally solves the problems of larger deviation of rock mechanics parameters obtained by a laboratory test and a field in-situ test and analogue simulation of a geotechnical wall-rock multi-field coupling environment. The test system has compact structure and low cost, is rather easy to install and dismount test pieces, detectors, pipelines and lead wires, and has stronger adaptability on the test pieces with different lithologies and sizes, thereby providing a set of complete technology and means for the study on the mechanical behavior of the wall-rock stability under a complex engineering geological condition.

The invention relates to a system for testing temperature-varying micro-nanometer indentations with vacuum protection characteristics and a method for testing the indentations, and belongs to the field of an optical mechanical and electrical integration precision science instrument. The system comprises a vacuum chamber system, a Z-shaft direction macro-adjusting mechanism, a Z-shaft long-stroke precision pressing-in drive unit, a Z-shaft short-stroke precision pressing-in drive unit, a pressing-in displacement signal detection unit, a pressing-in loading force signal detection unit, a temperature loading and detecting unit and an X-Y precision locating platform. The system is characterized that a high-temperature heating module and an indentation loading module are reasonably integrated so that the micro-nanometer indentations are tested at a temperature field; because vacuum environment is provided, the testing results cannot be affected by an oxidized specimen surface in a heating process; two driving methods such as motor drive and piezoelectric drive are adopted, so that the loading precision of the short-stroke indentation is ensured in test, and the requirement for largely loading the stroke indentations of a special material is also met. Thus the system and the method have the wide development prospect and application value in fields such as material science, aerospace and defense military industry.

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.

The invention discloses a multifunctional true triaxial rock creepmeter, comprising a base, a test piece mounting base arranged on the base, two groups of horizontal direction stress loading systems with the same structure, a vertical direction stress loading system and a creep data measuring system. The multifunctional true triaxial rock creepmeter disclosed by the invention can carry out a single-axis pulling and pressing creep test and also can carry out a true triaxial compression, pulling and pressing combined creep and unloading-creep test which simulates three-dimensional stress state and loading and unloading stress path of a natural geological rock mass and an engineering rock mass and maintain tension stress states in one or two directions unloaded to the rock; and test function is more comprehensive, practicability is stronger, and a pulling and pressing combined creep and stable pressing and pulling stress conversion unloading-creep test is realized; a pull pressure loading system can provide a pressure which is high enough to meet creep test requirements of most rock materials, and a long-term constant load can be provided; and the multifunctional true triaxial rock creepmeter disclosed by the invention has the characteristics of having a simpler structure, hardly consuming energy source in a test process and having low test cost.

The invention discloses a single-shaft pulling-pressing double-function creepmeter, which comprises a working platform, a pulling-pressing force loading system and a creep data measuring system. The working platform comprises a base, a first support rod assembly, a second support rod assembly, a press bearing plate, a pulling bearing plate, a working plate and a loading plate. The pulling-pressing force loading system comprises an oil drainage oil cylinder, a large-diameter oil cylinder and a small-diameter cylinder and further comprises a pulley weight loading device. The creep data measuring system comprises a strain sensor, a data collector and a microcomputer. The single-shaft pulling-pressing double-function creepmeter can be used for conducting both compression creep experiments andpulling creep experiments. The pulling-pressing force loading system can amplify weight loading load through a pulley block, and pressure can be amplified after being transferred to the large-diameter oil cylinder from the small-diameter oil cylinder, so that the loading force can meet requirements of a large mount of rocks for creep experiments. Simultaneously, the loading load is convenient to adjust and capable of maintaining constant for a long time. The creepmeter is high in measuring accuracy, low in manufacture cost and low in experiment cost due to the fact that the creepmeter consumes no electric energy in the experiment process.

The invention discloses a designing and prediction method for converting high-temperature stress relaxation data into creep data. The method mainly comprises the following steps: establishing a stress relaxation two-stage superposition model; creating the concepts of equivalent full relaxation time and equivalent relaxation creep rates, carrying out simulation of an equivalent relaxation creep rate in two integrated relaxation stages to obtain a steady-state creep rate under constant stress and establishing a stress relaxation-creep conversion model; acquiring stress relaxation performance data of a high-temperature component material; subjecting the data and the stress relaxation two-stage superposition model to fitting so as to obtain a corresponding material constant; and carrying out calculating according to a numerical analysis program, solving the stress relaxation-creep conversion model and eventually converting stress relaxation data into creep data so as to obtain a steady-state creep rate curve and a steady-state creep curve. According to the invention, accurate association between stress relaxation data and creep data behaviors is established; a prediction method for converting single relaxation data into creep data under any stress is constructed; so a novel approach is provided for designing of creep strength of a high-temperature member and for evaluation of the service life of the high-temperature member.

The invention is the multi-phase couple creep testing method of the broken rock and the equipment. The invention adopts the multi-phase lever driving device, the loading device connecting the driving device and the compressing device under the loading device. The lever loading makes the beam wind the hinge of the framework; add the charge conveyed by the lever system on the samples through the adjusting screw, the force sensor, the ball hinge pressing head and the infiltrator; implement worm misshaping test to the sample in the high-low temperatures. The invention is stable, simple, small, convenient and precise.

The invention relates to an in-situ tester for the micromechanical property of a material under combined tension and torsion, and belongs to the field of precise instruments. The tester comprises a base, a tension and torsion loading unit, a test-piece clamping unit, and a displacement and loading force precision testing unit, wherein the torsion loading unit drives two-level worm wheel and worm driving mechanisms to apply a torsion load to one end of a moving clamp through a precision motor, so that the torsion load is applied to a tested test-piece sample; a fixed clamp end is arranged on a precision guide rail sliding block; one end of the moving clamp is provided with a precision tension and torsion sensor for used for detecting the tension and torsion born by a testing workpiece, and a motor encoder can detect the tension strain and torsion angle. The in-situ tester provided by the invention has the characteristics that the structure is compact and exquisite, the volume is small, the weight is light, in-situ testing in micro-nano precision for the micromechanical property of the material under combined tension and torsion can be realized, and a novel testing method is provided for analytical investigation of a material deformation damage mechanism under the serving approaching condition.

The invention discloses a nondestructive test and evaluation method of a metal member / material residual life. The method comprises steps of: acquiring a relation curve between a metal member / material residual life and an ultrasonic second harmonic normalized value; carrying out ultrasonic second harmonic signal measurement on a metal member / material to be measured and obtaining a residual life score corresponding to the measured second harmonic normalized value according to the relation curve; predicting a residual life of the metal member / material to be measured according to the residual life score and a loading time of the metal member / material to be measured. The nondestructive test and evaluation method of the metal member / material residual life of the invention can carry out detection and evaluation on creep deformation damage of a working metal member / material part, rapidly and effectively predict the residual life of the working part and provide basis for safe service of the metal member / material.

The invention discloses a lever type tester for tension and compression rheology of rock. The lever type tester comprises a lever bracket, a primary lever, a secondary lever and a loading plate. The primary lever is hinged on the lever bracket; the secondary lever is formed by detachable connection from two lever segments; a first end of the secondary lever is hinged on the bracket lever, while a second end of the secondary lever is connected with the primary lever; a second fulcrum device is connected on the loading plate; and one lever segment of the secondary lever, connected with the primary lever, is detachably connected with the second fulcrum device. The lever type tester has the advantages that the load can be amplified at two stages by the primary lever and the second lever, the application of a big test load on a rock sample under the conditions of few weights and short levers is realized and the loading range is expanded; a compression rheology test of rock can be realized through the lever type tester under the condition that the second fulcrum device is removed; and a tension rheology test of rock can be realized through the lever type tester under the condition that the second fulcrum device is installed and the two lever segments of the secondary lever are detached from each other, thus the testing functions of the lever type tester are increased.