CN109030234B - System and method for testing long-time creep property of explosive - Google Patents
System and method for testing long-time creep property of explosive Download PDFInfo
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- CN109030234B CN109030234B CN201811097444.6A CN201811097444A CN109030234B CN 109030234 B CN109030234 B CN 109030234B CN 201811097444 A CN201811097444 A CN 201811097444A CN 109030234 B CN109030234 B CN 109030234B
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- 238000012360 testing method Methods 0.000 title claims abstract description 113
- 239000002360 explosive Substances 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000005259 measurement Methods 0.000 claims abstract description 27
- 238000004891 communication Methods 0.000 claims abstract description 10
- 238000006073 displacement reaction Methods 0.000 claims abstract description 10
- 230000005540 biological transmission Effects 0.000 claims abstract description 6
- 230000007774 longterm Effects 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 claims description 3
- 238000011160 research Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 5
- 238000004154 testing of material Methods 0.000 description 4
- 238000011056 performance test Methods 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 238000012669 compression test Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/18—Performing tests at high or low temperatures
Abstract
The invention discloses a testing system for long-time creep property of explosive, which comprises a control console, a temperature control system and a loading system, wherein the temperature control system and the loading system are connected with the control console, and the testing tables are respectively connected with the temperature control system and the loading system; the test bench is provided with a creep test unit, the creep test unit is arranged in a sealed transparent cover, a temperature control device is arranged below the transparent cover, and the temperature control device is connected with a temperature control system; the creep test unit is also connected with the loading system; the temperature sensor, the load sensor and the displacement sensor are connected to the measurement and control box, the measurement and control box controls the temperature regulation of the temperature control device, and simultaneously controls the regulation of the loading pressure of the loading system, and the measurement and control box further realizes information transmission with the control console through a communication line. The invention also provides a method for testing the long-time creep property of the explosive. The invention can greatly save cost, shorten research period and has great application value.
Description
Technical Field
The invention relates to an explosive creep property testing system and method, in particular to an explosive long-time creep property testing system and method, and belongs to the field of material experiment mechanics.
Background
The long-time creep performance test of the explosive material is one of important contents in the safety reliability assessment of an ammunition weapon system, and is a test method for testing the deformation behavior of the explosive material under the long-time stable action of constant tensile or compressive load.
When such experiments are carried out, the greatest difficulty faced in the actual operation process is that a plurality of samples (different temperature points, different stress levels, two forms of stretching and compression and the need of considering to ensure the repeatability of data) are measured, the time consumption is long (single shot is measured in months), the conventional explosive creep test is carried out on a material testing machine, however, the conventional material testing machine can only test one sample at a time, is only suitable for short-time creep tests for a plurality of hours, and if long-time (measured in months) creep tests are systematically carried out and data are acquired in a relatively short time, then a plurality of or ten material testing machines are simultaneously occupied, and the creep tests are simultaneously carried out in such a way that the material consumption cost is huge.
Disclosure of Invention
The invention aims to overcome the defects of the conventional explosive long-time creep test technology and provides an economic test system and test method for the long-time creep performance of the explosive, which can shorten the research period of the long-time creep performance test of the explosive.
The method has the following core ideas:
a set of hydraulic loading system and a plurality of creep deformation testing units are utilized to simultaneously carry out long-time creep deformation testing of a plurality of samples under different temperatures and stress loads, so that the cost is greatly saved, and the research period is shortened.
The invention is realized in particular as follows:
the system for testing the long-time creep property of the explosive comprises a control console, a temperature control system and a loading system which are connected with the control console, and a test bench which is respectively connected with the temperature control system and the loading system;
the test bench is provided with a creep test unit, the creep test unit is arranged in a sealed transparent cover, a temperature control device is arranged below the transparent cover, stable temperature control is provided for the creep test unit on the test bench, and the temperature control device is connected with a temperature control system; the creep test unit is also connected with the loading system and is used for realizing creep pressure control of the creep test unit; the temperature sensor, the load sensor and the displacement sensor are connected to the measurement and control box, the measurement and control box controls the temperature regulation of the temperature control device, and simultaneously controls the regulation of the loading hydraulic pressure of the loading system, and the measurement and control box further realizes information transmission with the control console through a communication line.
The further scheme is as follows:
the creep test unit comprises a tray, a hydraulic cylinder is fixedly connected to the tray, a piston of the hydraulic cylinder is connected with the connecting disc through a bolt, three connecting rods are further arranged on the outer side of the hydraulic cylinder, the lower parts of the connecting rods are fixedly connected with the tray, and the upper parts of the connecting rods are connected with the connecting disc; the upper part of the connecting disc and the lower part of the top disc are provided with load sensors and symmetrical explosive sample connecting devices, the outer side of each explosive sample connecting device is provided with three connecting rods, each connecting rod is connected with the connecting disc and the top disc, three fixing blocks are arranged below the top disc, through holes and screws are arranged on the fixing blocks, each fixing block is provided with an LVDT sensor through the corresponding through hole and screw, and a contact block at the bottom of each LVDT sensor is arranged above the connecting disc and corresponding to the corresponding fixing block; the hydraulic cylinder comprises two cavities, the two cavities are respectively provided with an oil inlet and outlet hole, the lower cavity is used for feeding oil pressure, the piston moves upwards, the upper part of the rack is driven to move upwards, so that compression load is generated on a tested sample, the upper cavity is used for feeding oil pressure, the piston moves downwards, the upper part of the rack is driven to move downwards, so that tensile load is generated on the tested sample, the oil holes are connected with an external hydraulic control system, and the regulation and maintenance of the oil pressure depend on the external hydraulic control system.
The further scheme is as follows:
the creep test unit is provided with 1, 2 or more on each test stand. The optimal scheme is that 2 or 3 parallel tests are arranged, so that the parallel tests can be realized, errors are reduced, and the problem that the test bed is complex and the test result is influenced due to excessive quantity is avoided.
The further scheme is as follows:
the system for testing the long-time creep property of the explosive comprises 1, 2 or more test tables.
The further scheme is as follows:
the temperature control device is a temperature-adjusting circulating pipeline, the temperature-adjusting circulating pipeline is connected with an oil inlet pipeline, the oil inlet pipeline is respectively connected with a cold oil valve and a hot oil valve, and the cold oil valve and the hot oil valve are connected to a cold oil pipeline and a hot oil pipeline of the temperature control system. The cold oil valve and the hot oil valve are connected with the measurement and control box.
The further scheme is as follows:
the loading system is respectively connected to oil inlet and outlet holes of two cavities of the hydraulic cylinder through a hydraulic pipeline, so that the piston of the hydraulic cylinder can be moved upwards or downwards.
The invention also provides a testing method of the long-time creep property of the explosive, which mainly adopts the testing system of the long-time creep property of the explosive, and comprises the following steps:
the method comprises the steps that an explosive sample is fixed through an explosive connecting device, a transparent cover is arranged, a control console sends instructions to a measurement and control box matched with the test bench through a communication line according to different requirements of different test benches on temperature and pressure, the measurement and control box sends control instructions to achieve temperature and hydraulic pressure control, at the moment, creep deformation testing of the explosive sample is achieved according to the size of hydraulic pressure and the displacement direction of a piston, information is collected through a displacement sensor, a load sensor and the temperature sensor and transmitted to the measurement and control box during testing, the temperature and pressure values of the measurement and control box are adjusted in real time according to the instructions of the control console, accordingly testing results are accurate, relevant data are transmitted to the control console through the communication line, and long-term creep deformation testing of a plurality of samples under different temperatures and stress loads is achieved.
The explosive sample connecting device is of a conventional structure for fixing an explosive sample, such as a bolt structure, a thread structure and a locking structure, and can be used for achieving good fixing effect on the explosive sample and satisfying compression and tensile tests of the explosive sample. The person skilled in the art can choose different explosive sample connection means according to the actual situation.
The invention has the beneficial effects that the test bed adopts a modularized design, the temperature control of each test bed and the hydraulic load control of each creep test unit are mutually independent, and according to actual specific requirements, long-time creep performance tests of a plurality of temperature points and stress levels can be simultaneously carried out by expanding a plurality of test beds and internal creep test units, and each creep test unit is equivalent to a material testing machine in the traditional creep test method, and the whole system adopts a set of temperature control system and loading system, so that the test material cost and the time cost can be greatly saved. The invention can greatly save cost, shorten research period and has great practical application value.
Drawings
FIG. 1 is an overall schematic diagram of a test system for long-term creep performance of an explosive according to the present invention;
FIG. 2 is a schematic diagram of the structure and connection relationship of a test stand according to the present invention.
Detailed Description
The invention will be further described with reference to the drawings and the specific examples.
Example 1
As shown in figures 1 and 2, the system for testing the long-time creep property of the explosive comprises a control console, a temperature control system and a loading system which are connected with the control console, and a test bench which is respectively connected with the temperature control system and the loading system;
the test bench is provided with a creep test unit, the creep test unit is arranged in a sealed transparent cover, a temperature control device is arranged below the transparent cover, stable temperature control is provided for the creep test unit on the test bench, and the temperature control device is connected with a temperature control system; the creep test unit is also connected with the loading system and is used for realizing creep pressure control of the creep test unit; the temperature sensor, the load sensor and the displacement sensor are connected to the measurement and control box, the measurement and control box controls the temperature regulation of the temperature control device, and simultaneously controls the regulation of the loading pressure of the loading system, and the measurement and control box further realizes information transmission with the control console through a communication line.
In the actual arrangement process, the test bed is connected with the temperature control system and the loading system through the transmission pipelines, and for convenient arrangement, the test bed can be symmetrically distributed by taking the transmission channels as axes.
The creep test unit comprises a tray, a hydraulic cylinder is fixedly connected to the tray, a piston of the hydraulic cylinder is connected with the connecting disc through a bolt, three connecting rods are further arranged on the outer side of the hydraulic cylinder, the lower parts of the connecting rods are fixedly connected with the tray, and the upper parts of the connecting rods are connected with the connecting disc; the upper part of the connecting disc and the lower part of the top disc are provided with load sensors and symmetrical explosive sample connecting devices, the outer side of each explosive sample connecting device is provided with three connecting rods, each connecting rod is connected with the connecting disc and the top disc, three fixing blocks are arranged below the top disc, through holes and screws are arranged on the fixing blocks, each fixing block is provided with an LVDT sensor through the corresponding through hole and screw, and a contact block at the bottom of each LVDT sensor is arranged above the connecting disc and corresponding to the corresponding fixing block; the hydraulic cylinder comprises two cavities, the two cavities are respectively provided with an oil inlet and outlet hole, the lower cavity is used for feeding oil pressure, the piston moves upwards, the upper part of the rack is driven to move upwards, so that compression load is generated on a tested sample, the upper cavity is used for feeding oil pressure, the piston moves downwards, the upper part of the rack is driven to move downwards, so that tensile load is generated on the tested sample, the oil holes are connected with an external hydraulic control system, and the regulation and maintenance of the oil pressure depend on the external hydraulic control system.
As one embodiment of the invention, the creep test units are arranged on each test stand by 3, so that parallel test can be realized, errors are reduced, and the problem that the test result is influenced due to the fact that the test stands are complicated due to excessive quantity is avoided.
The test system for the long-time creep performance of the explosive comprises 1, 2 or more test tables, wherein the number of the test tables can be increased or decreased according to actual needs until the number of the test tables meets experimental requirements.
As a specific embodiment of the invention, the temperature control device is a temperature-regulating circulating pipeline, the temperature-regulating circulating pipeline is connected with an oil inlet pipeline, the oil inlet pipeline is respectively connected with a cold oil valve and a hot oil valve, and the cold oil valve and the hot oil valve are connected to a cold oil pipeline and a hot oil pipeline of the temperature control system. The cold oil valve and the hot oil valve are connected with the measurement and control box. Correspondingly, the temperature control system is essentially an oil cylinder, cold oil and hot oil are provided for the temperature-adjusting circulating pipeline, and the working temperature of the creep test unit is adjusted by utilizing the oil temperature.
As a specific embodiment of the invention, the loading system is respectively connected to the oil inlet and outlet holes of the two cavities of the hydraulic cylinder through the hydraulic pipeline, so that the upward movement or the downward movement of the piston of the hydraulic cylinder is realized.
Example 2
The invention provides a testing method of long-time creep property of explosive, which mainly adopts the testing system of long-time creep property of explosive, and comprises the following steps:
the method comprises the steps that an explosive sample is fixed through an explosive connecting device, a transparent cover is arranged, a control console sends instructions to a measurement and control box matched with the test bench through a communication line according to different requirements of different test benches on temperature and pressure, the measurement and control box sends control instructions to achieve temperature and hydraulic pressure control, at the moment, creep deformation testing of the explosive sample is achieved according to the size of hydraulic pressure and the displacement direction of a piston, information is collected through a displacement sensor, a load sensor and the temperature sensor and transmitted to the measurement and control box during testing, the temperature and pressure values of the measurement and control box are adjusted in real time according to the instructions of the control console, accordingly testing results are accurate, relevant data are transmitted to the control console through the communication line, and long-term creep deformation testing of a plurality of samples under different temperatures and stress loads is achieved.
The explosive sample connecting device is of a conventional structure for fixing an explosive sample, such as a bolt structure, a thread structure and a locking structure, and can be used for achieving good fixing effect on the explosive sample and satisfying compression and tensile tests of the explosive sample. The person skilled in the art can choose different explosive sample connection means according to the actual situation.
Although the invention has been described herein with reference to the above-described illustrative embodiments thereof, the above-described embodiments are merely preferred embodiments of the present invention, and the embodiments of the present invention are not limited by the above-described embodiments, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the scope and spirit of the principles of this disclosure.
Claims (6)
1. A testing system for long-term creep property of explosive is characterized in that: the test bed comprises a control console, a temperature control system and a loading system, wherein the control console is connected with the temperature control system and the loading system;
the test bench is provided with a creep test unit, the creep test unit is arranged in a sealed transparent cover, a temperature control device is arranged below the transparent cover, stable temperature control is provided for the creep test unit on the test bench, and the temperature control device is connected with a temperature control system; the creep test unit is also connected with the loading system and is used for realizing creep pressure control of the creep test unit; the transparent cover is internally provided with a temperature sensor, the creep test unit is provided with a load sensor and a displacement sensor, the temperature sensor, the load sensor and the displacement sensor are connected to a measurement and control box, the measurement and control box controls the temperature regulation of the temperature control device and simultaneously controls the regulation of the loading pressure of the loading system, and the measurement and control box realizes information transmission with the control console through a communication line;
the creep test unit comprises a tray, a hydraulic cylinder is fixedly connected to the tray, a piston of the hydraulic cylinder is connected with the connecting disc through a bolt, three connecting rods are further arranged on the outer side of the hydraulic cylinder, the lower parts of the connecting rods are fixedly connected with the tray, and the upper parts of the connecting rods are connected with the connecting disc; an explosive sample connecting device and a load sensor are symmetrically arranged on the upper part of the connecting disc and the lower part of the top disc, three connecting rods are arranged on the outer side of the explosive sample connecting device, the connecting rods are connected with the connecting disc and the top disc, three fixing blocks are arranged below the top disc, through holes and screws are arranged on the fixing blocks, LVDT sensors are arranged on the fixing blocks through the through holes and the screws, and LVDT sensor bottom contact blocks are arranged above the connecting disc and at positions corresponding to the fixing blocks; the hydraulic cylinder comprises two cavities, the two cavities are respectively provided with an oil inlet and outlet hole, the lower cavity is used for feeding oil pressure, the piston moves upwards, the upper part of the rack is driven to move upwards, so that compression load is generated on a tested sample, the upper cavity is used for feeding oil pressure, the piston moves downwards, the upper part of the rack is driven to move downwards, so that tensile load is generated on the tested sample, the oil holes are connected with an external hydraulic control system, and the regulation and maintenance of the oil pressure depend on the external hydraulic control system.
2. The system for testing long-term creep performance of an explosive according to claim 1, wherein:
the creep test unit is provided with 1, 2 or more on each test stand.
3. The system for testing long-term creep performance of an explosive according to claim 1, wherein:
the system for testing the long-time creep property of the explosive comprises 1, 2 or more test tables.
4. The system for testing long-term creep performance of an explosive according to claim 1, wherein:
the temperature control device is a temperature-adjusting circulating pipeline, the temperature-adjusting circulating pipeline is connected with an oil inlet pipeline, the oil inlet pipeline is respectively connected with a cold oil valve and a hot oil valve, the cold oil valve and the hot oil valve are both connected to the cold oil pipeline and the hot oil pipeline of the temperature control system, and the cold oil valve and the hot oil valve are connected with the measurement and control box.
5. The system for testing long-term creep performance of an explosive according to claim 1, wherein:
the loading system is respectively connected to oil inlet and outlet holes of two cavities of the hydraulic cylinder through a hydraulic pipeline, so that the piston of the hydraulic cylinder can be moved upwards or downwards.
6. A method for testing long-time creep property of explosive is characterized in that:
a test system employing the long-term creep property of an explosive according to any one of claims 1 to 5 and comprising:
the method comprises the steps that an explosive sample is fixed through an explosive connecting device, a transparent cover is arranged, a control console sends instructions to a measurement and control box matched with a test bench through a communication line according to different requirements of different test benches on temperature and pressure, the measurement and control box sends control instructions to achieve temperature and hydraulic pressure control, at the moment, according to the size of hydraulic pressure and the displacement direction of a piston, creep testing of the explosive sample is achieved, information is collected through a load sensor and a temperature sensor and transmitted to the measurement and control box during testing, the temperature and pressure values of the measurement and control box are adjusted in real time according to the instructions of the control console, accordingly testing results are accurate, relevant data are transmitted to the control console through the communication line, and long-time creep deformation testing of a plurality of samples under different temperatures and stress loads is achieved.
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| CN201811097444.6A CN109030234B (en) | 2018-09-19 | 2018-09-19 | System and method for testing long-time creep property of explosive |
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| CN201811097444.6A CN109030234B (en) | 2018-09-19 | 2018-09-19 | System and method for testing long-time creep property of explosive |
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