NL2032696B1 - Stress detection and analysis test bench - Google Patents
Stress detection and analysis test bench Download PDFInfo
- Publication number
- NL2032696B1 NL2032696B1 NL2032696A NL2032696A NL2032696B1 NL 2032696 B1 NL2032696 B1 NL 2032696B1 NL 2032696 A NL2032696 A NL 2032696A NL 2032696 A NL2032696 A NL 2032696A NL 2032696 B1 NL2032696 B1 NL 2032696B1
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- Prior art keywords
- horizontal
- test piece
- reaction
- vertical
- fixedly connected
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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
- G01N3/02—Details
-
- 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
- G01N3/02—Details
- G01N3/04—Chucks
-
- 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
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/025—Geometry of the test
- G01N2203/0254—Biaxial, the forces being applied along two normal axes of the specimen
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0264—Beam
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
- G01N2203/0405—Features allowing alignment between specimen and chucks
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
Disclosed is a stress detection and analysis test bench, which comprises a base, wherein a 5 test piece placing table is fixedly arranged on the base; clamping mechanisms are arranged on both sides of the test piece placing table, so that the test piece can be conveniently clamped and fixed by the clamping mechanisms, and the stability of the test piece after clamping can be ensured; a reaction wall is fixedly connected to the base, a horizontal loading mechanism is slidably installed on one side wall of the reaction wall near the test piece placing platform, and a 10 vertical loading mechanism is installed on the reaction platform, through which stress detection tests of various components can be realized; a plurality of displacement sensors and strain gauges are arranged on the test piece, a strain box is arranged on any reaction platform, and the displacement sensors and strain gauges are electrically connected with the strain box; the invention is convenient to use, good in stability, high in applicability and mechanization level.
Description
STRESS DETECTION AND ANALYSIS TEST BENCH
The invention relates to the technical field of test instruments, in particular to a stress detection and analysis test bench.
Stress test bench is a commonly used test instrument in laboratory, which can test the stress of components. The existing stress test bench can only detect the stress of a single component, such as the compressive stress detection of column components or the compressive stress detection of beam-column component joints; moreover, the existing test-bed for detecting the compressive stress of beam-column joints often adopts the method of combining steel beams with ground anchor bolts to fix beam-column members. This method not only needs to drill holes for beam-column members before the test, but also has strict requirements on the position of the holes, which is time-consuming and laborious in fixing, and the degree of mechanization is low.
The purpose of the present invention is to provide a stress detection and analysis test bench to solve the problems existing in the prior art.
In order to achieve the above purpose, the invention provides the following scheme: the invention provides a stress detection and analysis test bench, which comprises a base, wherein a test piece placing table is fixedly arranged on the base, and the test piece placing table is used for placing test pieces; clamping mechanisms are arranged on both sides of the test piece placing table, and both clamping mechanisms comprise a reaction platform fixedly connected to the top of the base; two opposite side walls of the two reaction platforms are fixedly provided with first telescopic rods, and the free ends of the two first telescopic rods are fixedly connected with clamping plates, and both clamping plates are arranged corresponding to the test piece; a reaction wall is fixedly connected to the base, a horizontal loading mechanism is slidably installed on one side wall of the reaction wall close to the test piece placing table, and a vertical loading mechanism is installed on the reaction platform, and both the horizontal loading mechanism and the vertical loading mechanism are arranged correspondingly to the test piece; a plurality of displacement sensors and strain gauges are installed on the test piece, and a strain box is installed on any reaction platform, and the displacement sensors and strain gauges are electrically connected with the strain box.
Preferably, the vertical loading mechanism comprises two vertical threaded rods rotatably connected to the two reaction platforms, a horizontal beam is arranged between the two vertical threaded rods, and the horizontal beam is threadedly sleeved on the two vertical threaded rods; the bottom end of the horizontal beam is fixedly provided with a first actuator.
Preferably, the top of any reaction platform is fixedly equipped with a second motor, the output shaft of the second motor is connected with a first gear in a transmission way, and the bottom of the vertical threaded rod is fixedly connected with a second gear, and the first gear meshes with the second gear; the tops of the two vertical threaded rods are fixedly connected with sprockets, which are located on the same horizontal plane and are connected by chain transmission; the horizontal beam is located between the sprocket and the second gear.
Preferably, the horizontal loading mechanism comprises a second actuator slidably mounted on the side wall of the reaction wall, and an adjusting part is arranged between the reaction wall and the test piece placing table, and the adjusting part is used for adjusting the position of the second actuator on the reaction wall.
Preferably, the adjusting part comprises two upright posts fixedly connected to that base, a horizontal slide plate is arranged between the two upright posts, and two ends of the horizontal slide plate are respectively connected with the side walls of the two upright posts in a limited sliding way; a second telescopic rod is fixedly installed on the base, and the free end of the second telescopic rod is fixedly connected to the bottom end of the horizontal slide plate; the top end of the horizontal slide plate is provided with a slider in a limited sliding manner, and the slider is slidably sleeved on the fixed section of the second actuator.
Preferably, two ends of the top surface of the horizontal slide plate are fixedly connected with a first limit baffle and a second limit baffle, respectively, and the slider is located between the first limit baffle and the second limit baffle; one end of the horizontal worm is rotatably connected to one side wall of the first limit baffle close to the slider, the other end of the horizontal worm is fixedly connected to one end of a horizontal threaded rod, and the other end of the horizontal threaded rod is rotatably connected to the second limit baffle; the slider is screwed on the horizontal threaded rod, and a first motor is fixedly installed on the side wall of the first limit baffle, and the output shaft of the first motor is drivingly connected with a worm gear which meshes with the horizontal worm.
Preferably, two opposite side walls of the two upright posts are provided with vertical chutes, and the two ends of the horizontal slide plate are respectively limited and slidably connected in the two vertical chutes; the top of the horizontal slide plate is provided with a horizontal chute, and the slider is limited and slidably connected in the horizontal chute.
Preferably, the clamping plate has a U-shaped structure.
The invention discloses the following technical effects: the vertical loading mechanism and the horizontal loading mechanism can realize stress detection tests on various components, and the applicability is improved; the set clamping mechanism can clamp and fix the test piece conveniently, ensure the stability of the test piece after clamping, avoid the inaccurate test result caused by the displacement of the test piece in the stress detection test process, save manpower and material resources, and improve the mechanization level.
In order to more clearly explain the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to these drawings without any creative effort.
Fig. 1 is a schematic diagram of the front view structure of the stress detection and analysis test bench of the present invention;
Fig. 2 is a schematic left view of the adjusting part of the present invention;
Fig. 3 is a schematic plan view of the clamping plate of the present invention; among them, 1, base, 2, test piece placing table, 3, reaction platform, 4, reaction wall, 5, vertical threaded rod, 6, horizontal beam, 7, first actuator, 8, first pressing plate, 9, second actuator, 10, second pressing plate, 11, first telescopic rod, 12, clamping plate, 13, upright post, 14, horizontal slide plate, 15, second telescopic rod, 16. slider, 17, first limit baffle, 18, second limit baffle, 19, horizontal worm, 20, first motor, 21, worm gear, 22, horizontal threaded rod, 23, second motor, 24, first gear, 25, second gear, 28, sprocket, 27, vertical compression bar, 28, displacement sensor, 29, strain gauge, 30, strain box.
In order to make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be explained in further detail below with reference to the drawings and detailed description.
The invention provides a stress detection and analysis test bench, which comprises a base 1, wherein a test piece placing table 2 is fixedly arranged on the base 1, and the test piece placing table 2 is used for placing test pieces; clamping mechanisms are arranged on both sides of the test piece placing table 2, and both clamping mechanisms comprise a reaction platform 3 fixedly connected to the top of the base 1; two opposite side walls of the two reaction platforms 3 are fixedly provided with first telescopic rods 11, and the free ends of the two first telescopic rods 11 are fixedly connected with clamping plates 12, which are U-shaped, and both clamping plates 12 are arranged corresponding to the test piece; the first telescopic rod 11 is an electric telescopic rod, and the two first telescopic rods 11 drive the clamping plates 12 to move horizontally, which is convenient for clamping and fixing test pieces of different sizes; by setting the clamping plates 12 in a U-shaped structure, the two clamping plates 12 wrap the sides of the test pieces, so that the clamped test pieces can be more stable; a reaction wall 4 is fixedly connected to the base 1, a horizontal loading mechanism is slidably installed on one side wall of the reaction wall 4 close to the test piece placing table 2, and a vertical loading mechanism is installed on the reaction platform 3, and both the horizontal loading mechanism and the vertical loading mechanism are arranged correspondingly to the test piece; through the vertical loading mechanism and the horizontal loading mechanism, the invention can be applied to a variety of different test pieces, and can not only detect the vertical compressive stress of column test pieces, but also detect the compressive stress of beam-column member nodes; a plurality of displacement sensors 28 and strain gauges 29 are installed on the test piece, and a strain box 30 is installed on any reaction platform 3, and the displacement sensors 28 and strain gauges 29 are electrically connected with the strain box 30; the displacement sensor 28 and the strain gauge 29 are electrically connected with the strain box 30, which facilitates the real-time stress acquisition, transmission and analysis of the whole testing process of the test piece.
Further, the vertical loading mechanism comprises two vertical threaded rods 5 rotatably connected to the two reaction platforms 3, a horizontal beam 6 is arranged between the two vertical threaded rods 5, and the horizontal beam 6 is threadedly sleeved on the two vertical threaded rods 5; the bottom end of the horizontal beam 6 is fixedly provided with a first actuator 7, the free end of the first actuator 7 is detachably connected with a first pressing plate 8, and the bottom edge of the first pressing plate 8 is fixedly connected with a plurality of vertical compression bars 27 along the circumferential direction; in the invention, the first pressing plate 8 has a rectangular structure, and four vertical compression bars 27 are arranged at four corners of the bottom surface of the first pressing plate 8; the first pressing plate 8 arranged on the first actuator 7 is convenient for testing the compressive stress of the column member; at this time, the column member is located in the rectangular structure composed of four vertical compression bars 27, and there are gaps between the column member, the first pressing plate 8 and the four vertical compression bars 27; when testing the compressive stress of the beam- column joints, the four vertical compression bars 27 can press the columns in the beam-column members, which are used together with the clamping plates 12 to further ensure the clamping stability of the test pieces.
Furthermore, the top of any reaction platform 3 is fixedly equipped with a second motor 23, the output shaft of the second motor 23 is connected with a first gear 24 in a transmission way, and the bottom of the vertical threaded rod 5 is fixedly connected with a second gear 25, and the first gear 24 meshes with the second gear 25; the tops of the two vertical threaded rods 5 are fixedly connected with sprockets 26, which are located on the same horizontal plane and are connected by chain transmission; the horizontal beam 6 is located between the sprocket 26 and the second gear 25; the second motor 23 drives the first gear 24 to rotate, the second gear 25 on the vertical threaded rod 5 to rotate, and then the vertical threaded rod 5 to rotate; then, the two vertical threaded rods 5 are driven by sprockets 26 respectively arranged at the top of the two vertical threaded rods 5, which can realize the synchronous rotation of the two vertical threaded rods 5, and then drive the horizontal beam 6 to move up and down along the axial direction of the vertical threaded rod 5, thus realizing the height adjustment of the first actuator 7; through the threaded connection of the horizontal beam 7 with the two vertical threaded rods 5, when the first actuator 7 is loaded, the horizontal beam 7 can bear enough reaction force, thus avoiding the displacement of the horizontal beam 7 during the loading process. 5 Further, the horizontal loading mechanism comprises a second actuator 9 slidably mounted on the side wall of the reaction wall 4, the free end of the second actuator 9 is detachably connected with a second pressing plate 10, and an adjusting part is arranged between the reaction wall 4 and the test piece placing table 2, and the adjusting part is used for adjusting the position of the second actuator 9 on the reaction wall 4; the adjusting part comprises two upright posts 13 fixedly connected to that base 1, a horizontal slide plate 14 is arranged between the two upright posts 13, and two ends of the horizontal slide plate 14 are respectively connected with the side walls of the two upright posts 13 in a limited sliding way; a second telescopic rod 15 is fixedly installed on the base 1, and the free end of the second telescopic rod 15 is fixedly connected to the bottom end of the horizontal slide plate 14; the top end of the horizontal slide plate 14 is provided with a slider 16 in a limited sliding manner, and the slider 16 is slidably sleeved on the fixed section of the second actuator 9; in the invention, the second telescopic rod 15 is an electric telescopic rod, which can drive the horizontal slide plate 14 to move up and down in the height direction, and ensure the stability of the horizontal slide plate 14 after height adjustment, thereby driving the slider 16 and the second actuator 9 to move, thus realizing the height adjustment of the second actuator 9; by sliding the slider 16 on the fixed section of the second actuator 9, when the second actuator 9 is loaded, the second actuator 9 can make a slight displacement in the slider 16 along the axial direction of the second actuator 9, so that the reaction wall 4 bears all the reaction force, thus preventing the slider 16 from moving or even being damaged due to excessive force.
Furthermore, two ends of the top surface of the horizontal slide plate 14 are fixedly connected with a first limit baffle 17 and a second limit baffle 18, respectively, and the slider 16 is located between the first limit baffle 17 and the second limit baffle 18; one end of the horizontal worm 19 is rotatably connected to one side wall of the first limit baffle 17 close to the slider 16, the other end of the horizontal worm 19 is fixedly connected to one end of a horizontal threaded rod 22, and the other end of the horizontal threaded rod 22 is rotatably connected to the second limit baffle 18; the slider 16 is screwed on the horizontal threaded rod 22, and a first motor 20 is fixedly installed on the side wall of the first limit baffle 17, and the output shaft of the first motor 20 is drivingly connected with a worm gear 21 which meshes with the horizontal worm 19; the worm gear 21 is driven by the first motor 20 to rotate, and the worm gear 21 drives the horizontal worm 19 to rotate, and then the horizontal threaded rod 22 can be driven by the horizontal worm 19 to rotate; because the slider 16 is screwed with the horizontal threaded rod 22 and the bottom of the slider 16 is connected with the horizontal slide plate 14 in a sliding way, that is, the rotational freedom of the slider 16 is constrained, so the slider 16 can move left and right along the axis direction of the horizontal threaded rod 22; therefore, the adjustment of the second actuator 9 in the horizontal direction is realized, and the stability of the slider 19 and the second actuator 9 after the position adjustment can be ensured by using the self-locking property of the worm gear 21 and the horizontal worm 19; by cooperating with the height adjustment of the horizontal slide plate 14, the position adjustment of the second actuator 9 on the reaction wall 4 can be realized in a large range, and the flexibility and applicability are improved.
Furthermore, the two opposite side walls of the two upright posts 13 are provided with vertical chutes, and the two ends of the horizontal slide plate 14 are respectively limited and slidably connected in the two vertical chutes; the top of the horizontal slide plate 14 is provided with a horizontal chute, and the slider 16 is limited and slidably connected in the horizontal chute; the vertical chute and the horizontal chute are arranged to facilitate the sliding of the horizontal slide plate 14 and the slider 16, and can limit the horizontal slide plate 14 and the slider 16 so that they can only slide in a fixed direction, thus further ensuring the stability of the position adjustment of the horizontal slide plate 14 and the slider 16.
When the stress detection and analysis test bench provided by the invention is used, the test piece is placed on the test piece placing table 2, the displacement sensor 28 and the strain gauge 29 are installed on the test piece as required, and are electrically connected with the strain box 30 through wires; when the test piece is a column member, the horizontal loading mechanism and the clamping mechanism do not need to be started, only the second motor 23 needs to be started, after a series of transmissions, the height of the first actuator 7 is adjusted, and then the first pressing plate 8 on the first actuator 7 abuts against the top surface of the column member and loads as required; when the test piece is a beam-column member, when the stress of the beam-column joint is detected, the column in the beam-column member is clamped by the clamping mechanism at first, and then the top surface of the column is pressed by the four vertical compression bars 27 on the first actuator 7, thus ensuring the stability of the test piece after being fixed; then, the position of the second actuator 9 is adjusted by the adjusting part, and after it is adjusted to a proper position, the second pressing plate 10 on the second actuator 9 abuts against the beam end, and then it is loaded as required.
The above-mentioned embodiments only describe the preferred mode of the invention, but do not limit the scope of the invention. On the premise of not departing from the design spirit of the invention, all kinds of modifications and improvements made by ordinary technicians in the field to the technical scheme of the invention shall fall within the scope of protection determined by the claims of the invention.
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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NL2032696A NL2032696B1 (en) | 2022-08-06 | 2022-08-06 | Stress detection and analysis test bench |
Applications Claiming Priority (1)
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NL2032696A NL2032696B1 (en) | 2022-08-06 | 2022-08-06 | Stress detection and analysis test bench |
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NL2032696B1 true NL2032696B1 (en) | 2023-05-16 |
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NL2032696A NL2032696B1 (en) | 2022-08-06 | 2022-08-06 | Stress detection and analysis test bench |
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Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106996900A (en) * | 2017-05-16 | 2017-08-01 | 华北理工大学 | Axial push-pull experimental rig and its test method under effect of contraction |
CN111678812A (en) * | 2020-06-24 | 2020-09-18 | 烟台大学 | Double-top L-beam loading compression shear test system |
-
2022
- 2022-08-06 NL NL2032696A patent/NL2032696B1/en active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106996900A (en) * | 2017-05-16 | 2017-08-01 | 华北理工大学 | Axial push-pull experimental rig and its test method under effect of contraction |
CN111678812A (en) * | 2020-06-24 | 2020-09-18 | 烟台大学 | Double-top L-beam loading compression shear test system |
Non-Patent Citations (2)
Title |
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BEYDOKHTY EBRAHIM ZAMANI ET AL: "Behavior of Damaged Exterior RC Beam-Column Joints Strengthened by CFRP Composites", LATIN AMERICAN JOURNAL OF SOLIDS AND STRUCTURES, vol. 13, no. 5, 1 May 2016 (2016-05-01), pages 880 - 896, XP093029688, Retrieved from the Internet <URL:https://www.scielo.br/j/lajss/a/NBsbxbXSX5FYd7fNkLfF7vC/?format=pdf&lang=en> [retrieved on 20230307], DOI: 10.1590/1679-78252258 * |
ROY BISWAJIT ET AL: "Cyclic behavior of in-situ exterior beam-column subassemblies with cold joint in column", ENGINEERING STRUCTURES, ELSEVIER, AMSTERDAM, NL, vol. 132, 15 December 2016 (2016-12-15), pages 822 - 833, XP029857884, ISSN: 0141-0296, DOI: 10.1016/J.ENGSTRUCT.2016.12.001 * |
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