CN216747194U - Synchronous testing arrangement of solid material power and deformation under high temperature - Google Patents
Synchronous testing arrangement of solid material power and deformation under high temperature Download PDFInfo
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- CN216747194U CN216747194U CN202123194459.4U CN202123194459U CN216747194U CN 216747194 U CN216747194 U CN 216747194U CN 202123194459 U CN202123194459 U CN 202123194459U CN 216747194 U CN216747194 U CN 216747194U
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Abstract
The utility model discloses a solid material power and deformation synchronous testing arrangement under high temperature, the device includes compression testing machine, sets up the high temperature furnace between compression testing machine's the stand, the solid material test piece is placed in the high temperature furnace, the top and the bottom of solid material test piece are through passing the loading linkage unit of high temperature furnace is connected with loading head and bearing head respectively, the loading linkage unit is equipped with the displacement meter, the loading head is equipped with force transducer. The synchronous testing device can obtain the real stress-strain relation of the solid material under constant high temperature and also can obtain the real strain development rule of the solid material under constant load in the slow temperature rising/reducing process, and provides an important means for researching the high-temperature mechanical property of the solid material, thereby providing technical support for guaranteeing the safe service of the whole life cycle of the building/structure built by the solid materials such as concrete, rock, ceramic and the like.
Description
Technical Field
The utility model belongs to the technical field of civil engineering, concretely relates to solid material power and deformation synchronous testing arrangement under high temperature.
Background
Buildings/structures constructed from solid materials such as concrete, rock, ceramic, etc. may be subjected to high temperatures from fire, geothermal heat, etc. during their service life. The mechanical property of the solid materials at high temperature is important for analyzing and evaluating the whole life cycle safety service of the buildings/structures. For this reason, the mechanical property test of solid materials at high temperature is of great interest.
In a loading test of a solid material at a high temperature, due to a high-temperature environment around a solid material test piece, a extensometer, a strain gauge and the like cannot be directly used for a deformation test of the test piece. To this end, some scholars (e.g., knobs, etc. (1990)) use the machine displacement of the tester to characterize the deformation of the test piece. However, the machine displacement of the testing machine includes not only the deformation of the solid material test piece, but also the deformation of force-transmitting parts such as the loading head, the conversion device and the pressure-bearing plate, and the real deformation of the solid material test piece cannot be accurately reflected. Thus, some scholars (e.g., Huo et al (2009)) characterize the deformation of a solid material test piece by testing the relative displacement of the conversion device, excluding the effect of loading head deformation. However, the displacement also includes deformation of the transfer device and the bearing plate, and is not true deformation of the solid material test piece. Alogla and Kodur (2020) set up a quartz rod that penetrates the conversion device, directly against the top of the test piece, characterizing the deformation of the solid material test piece by the displacement of the quartz rod, further excluding the influence of the conversion device. However, the displacement includes deformation of the bottom bearing steel plate, and is not true deformation of the solid material test piece. In a word, a synchronous testing device for solid material force and deformation at high temperature, which can eliminate deformation of force transmission parts such as a loading head, a conversion device, a bearing plate and the like, is in urgent need of development.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a solid material power and deformation synchronous testing arrangement under high temperature in order to solve above-mentioned problem, realize bearing the synchronous accurate test of solid material power and deformation under high temperature.
The purpose of the utility model is realized through the following technical scheme:
a synchronous testing device for force and deformation of a solid material at high temperature comprises a pressure testing machine, wherein the pressure testing machine comprises a base, a cross beam, an upright post, a loading head and a bearing head,
a high-temperature furnace for heating a solid material test piece to be tested is arranged between the upright columns of the pressure testing machine, the solid material test piece is placed in the high-temperature furnace,
the top and the bottom of the solid material test piece are respectively connected with a loading head and a bearing head through a loading connection unit which passes through the high-temperature furnace,
the loading connection unit is provided with a displacement meter, and the loading head is provided with a force sensor.
Further, the loading connection unit comprises a conversion device, a quartz device, an additional loading head and an additional pressure bearing head,
the top surface of the solid material test piece is sequentially connected with the additional loading head, the conversion device and the loading head, and the bottom surface of the solid material test piece is sequentially connected with the additional bearing head, the conversion device and the bearing head.
Furthermore, the centers of the additional loading head and the additional pressure bearing head are provided with a through cylindrical hole, the middle position of the conversion device is provided with a through square hole, and the middle position of one side of the square hole is provided with a through cylindrical hole in the direction vertical to the square hole;
the quartz device is T-shaped and is formed by assembling a cylindrical long rod and a quartz plate vertically connected with the cylindrical long rod, the quartz plate penetrates through the square hole protruding conversion device through the conversion device, and the cylindrical long rod penetrates through a cylindrical hole of the conversion device and a cylindrical hole of the additional loading head or the additional bearing head to directly abut against the surface of the solid material test piece.
Further, the test end of the displacement meter is in contact with the protruding position of the quartz plate.
Furthermore, a spring is arranged between the quartz plate of the quartz device and the top surface or the bottom surface of the square through hole of the conversion device inside the conversion device, so that the end of the cylindrical long rod of the quartz device is always tightly attached to the surface of the solid material test piece in the test process.
Furthermore, the conversion device, the additional loading head and the additional bearing head are all made of high-strength steel.
Further, the outer portions of the additional loading head and the additional pressure bearing head are wrapped with a heat insulation layer.
Furthermore, holes are formed in the top and the bottom of the high-temperature furnace, and the additional loading head and the additional bearing head penetrate through the holes to be connected with the solid material test piece.
Furthermore, the force sensor and the displacement meter are connected with the data acquisition instrument through signal lines.
A method for synchronously testing the force and the deformation of a solid material at high temperature adopts the testing device to test, and comprises the following steps:
installing a device according to the principle from bottom to top, installing a solid material test piece in a high-temperature furnace, and connecting a loading connection unit;
before loading or heating, starting a data acquisition instrument, after installing each part and test piece, starting a high-temperature furnace to heat to a preset temperature, and then starting a pressure testing machine for loading;
when a slow temperature rise test under constant load is carried out, a pressure tester is started to load to a preset load value, and then a high-temperature furnace is started to carry out the temperature rise/decrease test according to a preset temperature rise/decrease curve.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model provides a solid material power and deformation synchronous testing arrangement under high temperature through setting up conversion equipment, quartz installation, additional loading head and additional bearing head, has got rid of the deformation of loading head, bearing head, conversion equipment etc. biography power part, has realized the deformation of solid material test piece under the high temperature and the synchronous accurate test of power. The device can obtain the real stress-strain relation of the solid material under constant high temperature and also can obtain the real strain development rule of the solid material under constant load in the slow temperature rise process, and provides an important means for researching the high-temperature mechanical property of the solid material, thereby providing technical support for guaranteeing the safe service of the whole life cycle of a building/structure built by the solid materials such as concrete, rock, ceramic and the like.
Drawings
Fig. 1 is a schematic front view of an embodiment of the device of the present invention.
Fig. 2 is a schematic side view of an embodiment of the device of the present invention.
Wherein: the device comprises a 1-conversion device, a 2-quartz device, a 3A-additional loading head, a 3B-additional bearing head, a 4-thermal insulation layer, a 5-solid material test piece, a 6-high temperature furnace, a 7-spring, an 8-displacement meter, a 9-data acquisition instrument, a 10-pressure testing machine (10A-loading head, 10B-bearing head, 10C-beam, 10D-base, 10E-column) and an 11-force sensor.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 and 2, the device for synchronously testing the force and deformation of the solid material at the high temperature comprises a conversion device 1, a quartz device 2, an additional loading head 3A, an additional bearing head 3B, a heat insulation layer 4, a solid material test piece 5, a high-temperature furnace 6, a spring 7, a displacement meter 8, a data acquisition instrument 9, a pressure tester 10 (comprising a loading head 10A, a bearing head 10B, a cross beam 10C, a base 10D and an upright post 10E) and a force sensor 11.
The top and the bottom of the high-temperature furnace 6 are provided with round holes and are placed between the pressure tester columns 10E. The additional loading head 3A and the additional bearing head 3B can pass through the round holes at the top and the bottom of the high-temperature furnace. The solid material test piece 5 is positioned in the high-temperature furnace, the top surface of the solid material test piece is sequentially connected with the additional loading head 3A, the conversion device 1 and the pressure testing machine loading head 10A, and the bottom surface of the solid material test piece is sequentially connected with the additional bearing head 3B, the conversion device 1 and the pressure testing machine bearing head 10B. The loading head 10A of the pressure tester is provided with a pressure sensor 11 for testing the load applied to the solid material test piece 5 in real time. The centers of the additional loading head 3A and the additional bearing head 3B are provided with through cylindrical holes. A through square hole is arranged in the middle of the conversion device 1, and a through cylindrical hole is arranged in the middle of one side of the square hole in the direction perpendicular to the square hole. The quartz device 2 is T-shaped and is formed by assembling a cylindrical long rod and a quartz plate vertically connected with the cylindrical long rod, wherein the cylindrical long rod penetrates through a cylindrical hole of the conversion device 1 and a cylindrical hole of the additional loading head 3A (or the additional bearing head 3B) to directly support the top surface (or the bottom surface) of the solid material test piece, and the quartz plate penetrates through the conversion device 1 and protrudes out of the conversion device 1 through a square hole. The displacement meter 8 is externally provided to test the displacement of the quartz plate protruding from the conversion device 1. The displacement is the displacement of the top surface or the bottom surface of the solid material test piece 5, and the difference between the displacements of the top surface and the bottom surface is the deformation of the solid material test piece 5. Inside conversion equipment 1, set up a spring 7 between 2 quartz plates of quartz set and conversion equipment 1 run through square hole top surface (or bottom surface), guarantee that 2 cylinder stock ends of quartz set hug closely solid material test piece 5 top surface (or bottom surface) all the time in the test process. And the force sensor 11 and the displacement meter 8 are connected with the data acquisition instrument 9 through signal wires, so that load and deformation synchronous monitoring and storage are realized. The conversion device 1, the additional loading head 3A and the additional bearing head 3B are all made of high-strength steel. The additional loading head 3A and the additional bearing head 3B are externally wrapped with a heat insulation layer 4, and the high-temperature furnace 6 can realize continuous temperature rise/fall processes of multiple sections at different speeds and long-time constant temperature.
During specific testing, the device is installed according to the principle from bottom to top. Firstly, a lower conversion device 1 and an additional bearing head 3B are installed on a bearing head 10B of a testing machine, secondly, a quartz rod in a quartz device 2 penetrates through the additional bearing head 3B and holes of the conversion device 1, then a high-temperature furnace 6 is fixed and placed with a solid material test piece 5, and then a quartz plate and a lower spring 7 in the quartz device 2 are installed through a square hole in the lower conversion device 1, so that the end part of the quartz rod is ensured to be contacted with the bottom of the solid material test piece 5. After the lower part is finished, the upper additional loading head 3A is installed and the quartz rod in the quartz device 2 is sleeved into the hole. The upper conversion device 1 is then installed and the quartz plate and spring 7 in the quartz device 2 are installed through the square hole of the upper conversion device 1, ensuring that the end of the quartz rod is in contact with the top of the solid material test piece 5. Finally, the displacement meter 8 is installed, and the signal lines of the displacement meter 8 and the force sensor 11 are connected with the data acquisition instrument 9. Before loading or heating, the data acquisition instrument 9 is started to ensure synchronous monitoring and storage of signal data of the displacement meter 8 and the force sensor 11 in the whole loading and heating process. When the mechanical property test of the solid material is carried out at a constant high temperature, after all parts and test pieces are installed, the high-temperature furnace 6 is started to heat to a preset temperature, and then the compression testing machine 10 is started to load. When a slow temperature rise test under constant load is carried out, the pressure tester 10 is started to load to a preset load value, and then the high-temperature furnace 6 is started to carry out the temperature rise/fall test according to a preset temperature rise/fall curve.
The embodiments described above are intended to facilitate the understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should understand that all the improvements and modifications made without departing from the scope of the present invention according to the disclosure of the present invention should be within the protection scope of the present invention.
Claims (9)
1. A synchronous testing device for force and deformation of a solid material at a high temperature comprises a compression testing machine (10), wherein the compression testing machine (10) comprises a base (10D), a cross beam (10C), an upright post (10E), a loading head (10A) and a pressure bearing head (10B), and is characterized in that,
a high-temperature furnace (6) for heating a solid material test piece (5) to be tested is arranged between the columns (10E) of the pressure tester (10), the solid material test piece (5) is placed in the high-temperature furnace (6),
the top and the bottom of the solid material test piece (5) are respectively connected with a loading head (10A) and a pressure bearing head (10B) through a loading connection unit passing through the high-temperature furnace (6),
the loading connection unit is provided with a displacement meter (8), and the loading head (10A) is provided with a force sensor (11).
2. The synchronous testing device for solid material force and deformation at high temperature according to claim 1, wherein the loading connection unit comprises a conversion device (1), a quartz device (2), an additional loading head (3A) and an additional bearing head (3B),
the top surface of the solid material test piece (5) is sequentially connected with the additional loading head (3A), the conversion device (1) and the loading head (10A), and the bottom surface of the solid material test piece is sequentially connected with the additional pressure bearing head (3B), the conversion device (1) and the pressure bearing head (10B).
3. The device for synchronously testing the force and the deformation of the solid material at the high temperature according to claim 2, wherein a through cylindrical hole is formed in the centers of the additional loading head (3A) and the additional bearing head (3B), a through square hole is formed in the middle of the conversion device (1), and a through cylindrical hole is further formed in the middle of one side of the square hole in the direction perpendicular to the square hole;
the quartz device (2) is T-shaped and is formed by assembling a cylindrical long rod and a quartz plate vertically connected with the cylindrical long rod, the quartz plate penetrates through the square hole protruding conversion device (1) through the conversion device (1), and the cylindrical long rod penetrates through a cylindrical hole of the conversion device (1) and a cylindrical hole of the additional loading head (3A) or the additional bearing head (3B) and directly abuts against the surface of the solid material test piece (5).
4. A device for simultaneous force and deformation testing of solid materials at high temperatures according to claim 3, characterized in that the testing end of the displacement meter (8) is in contact with the protruding position of the quartz plate.
5. The device for synchronously testing the force and the deformation of the solid material at the high temperature according to claim 3, characterized in that a spring (7) is arranged between a quartz plate of the quartz device (2) and the top surface or the bottom surface of a through square hole of the conversion device (1) in the conversion device (1) to ensure that the end of a cylindrical long rod of the quartz device (2) is always tightly attached to the surface of the solid material test piece (5) in the test process.
6. The device for synchronously testing the force and the deformation of the solid material at the high temperature according to claim 3, wherein the conversion device (1), the additional loading head (3A) and the additional bearing head (3B) are all made of high-strength steel.
7. The device for synchronously testing the force and the deformation of the solid material at the high temperature according to claim 6, wherein the additional loading head (3A) and the additional bearing head (3B) are externally wrapped with a heat insulation layer (4).
8. The device for synchronously testing the force and the deformation of the solid material at the high temperature according to claim 2, wherein holes are formed in the top and the bottom of the high-temperature furnace (6), and the additional loading head (3A) and the additional bearing head (3B) penetrate through the holes to be connected with the solid material test piece (5).
9. The device for synchronously testing the force and the deformation of the solid material at the high temperature according to claim 1, wherein the force sensor (11) and the displacement meter (8) are connected with a data acquisition instrument (9) through signal lines.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123194459.4U CN216747194U (en) | 2021-12-17 | 2021-12-17 | Synchronous testing arrangement of solid material power and deformation under high temperature |
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| CN202123194459.4U CN216747194U (en) | 2021-12-17 | 2021-12-17 | Synchronous testing arrangement of solid material power and deformation under high temperature |
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