CN116593283A - Tensile-bending-torsion coupling test device for CFRP unidirectional plate - Google Patents

Tensile-bending-torsion coupling test device for CFRP unidirectional plate Download PDF

Info

Publication number
CN116593283A
CN116593283A CN202310359598.2A CN202310359598A CN116593283A CN 116593283 A CN116593283 A CN 116593283A CN 202310359598 A CN202310359598 A CN 202310359598A CN 116593283 A CN116593283 A CN 116593283A
Authority
CN
China
Prior art keywords
assembly
cfrp
torsion
counter
unidirectional plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310359598.2A
Other languages
Chinese (zh)
Inventor
许国文
刘晓刚
岳清瑞
亓立刚
杨燕
黄斌
周瑜健
李知恒
吴杭姿
王彬楠
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
University of Science and Technology Beijing USTB
China Construction Eighth Engineering Division Co Ltd
Original Assignee
University of Science and Technology Beijing USTB
China Construction Eighth Engineering Division Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by University of Science and Technology Beijing USTB, China Construction Eighth Engineering Division Co Ltd filed Critical University of Science and Technology Beijing USTB
Priority to CN202310359598.2A priority Critical patent/CN116593283A/en
Publication of CN116593283A publication Critical patent/CN116593283A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
    • 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
    • G01N3/26—Investigating twisting or coiling properties
    • 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
    • G01N2203/06—Indicating or recording means; Sensing means
    • G01N2203/067—Parameter measured for estimating the property
    • G01N2203/0676—Force, weight, load, energy, speed or acceleration
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T50/00—Aeronautics or air transport
    • Y02T50/40—Weight reduction

Landscapes

  • 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

The invention discloses a tensile-bending-torsion coupling test device of a CFRP unidirectional plate, which comprises a transmission assembly, a movable connecting assembly, a fixed assembly, a transverse tension assembly, a longitudinal pressing assembly and a torsion assembly, wherein the transmission assembly is connected with the fixed assembly; the torsion component is connected with the CFRP unidirectional plate and is connected at different angles relative to the movable connecting component so as to apply torsion load; the transverse tension assembly, the movable connecting assembly and the fixed assembly are coaxially connected through the transmission assembly, the transverse tension assembly applies horizontal tension and applies tensile load to the CFRP unidirectional plate; the longitudinal pressing component is sleeved on the CFRP unidirectional plate, the control component is externally connected with the longitudinal pressing component, and the longitudinal pressing component is driven by the external control component to apply bending load to the CFRP unidirectional plate. The test device is used for researching the mechanical properties of the CFRP unidirectional plate under the condition of complex stress, solves the problems that the loading mode of the conventional test device is single, cannot meet the test device requirement of the actual engineering characterization material characteristics, and provides technical support for the mechanical property test of the CFRP unidirectional plate.

Description

Tensile-bending-torsion coupling test device for CFRP unidirectional plate
Technical Field
The invention relates to the technical field of civil engineering, in particular to a tensile-bending-torsion coupling test device for a CFRP unidirectional plate.
Background
The carbon fiber reinforced composite material (Carbon Fiber Reinforced Plastic, CFRP for short) has the advantages of light weight, high strength, corrosion resistance, fatigue resistance, convenient transportation and the like, and is widely applied to reinforcement and maintenance of bridges and various building components at present. Due to the installation accuracy or the actual working condition, the CFRP material may be in a tension-bending-torsion composite stress state in the actual engineering.
The existing CFRP unidirectional plate mechanical property test device mainly loads unidirectionally, is difficult to apply stretching, bending and torsion to a sample at the same time, and is difficult to avoid the mutual influence between the stretching-bending-torsion mechanisms, so that higher stretching-torsion loading precision is difficult to ensure, and the CFRP unidirectional plate mechanical property test device cannot be applied to the application of stretching-bending-torsion coupling stress and the complex stress situations of a cable body in actual service.
Therefore, there is a need for a CFRP unidirectional sheet tension-bend-torsion coupling loading device to verify the mechanical properties of the CFRP unidirectional sheet, and the tension, bending and torsion are reduced.
Disclosure of Invention
Aiming at the technical problems of the existing CFRP unidirectional plate mechanical property test device, the invention provides a CFRP unidirectional plate pulling-bending-twisting coupling loading device which can simultaneously apply tensile load, bending load and torsion load to a sample and simultaneously measure axial line deformation and bending deformation torsion angle deformation generated by the sample, thereby realizing effective pulling-bending-twisting coupling test on the CFRP unidirectional plate.
In order to achieve the above purpose, the invention provides a tensile-bending-torsion coupling test device for a CFRP unidirectional plate, which comprises a first loading unit and a second loading unit, wherein the first loading unit and the second loading unit are oppositely arranged, and a loading area of the CFRP unidirectional plate is formed in the middle and is used for placing the CFRP unidirectional plate to be tested;
the first loading unit or the second loading unit comprises a transmission assembly, a movable connecting assembly, a fixed assembly, a transverse tension assembly, a longitudinal pressing assembly and a torsion assembly;
the torsion component is connected with the CFRP unidirectional plate and is connected at different angles relative to the movable connecting component, and the CFRP unidirectional plate connected with the torsion component can be subjected to torsion operation so as to apply torsion load;
the transverse tension assembly is sleeved on the transmission assembly and coaxially connects the transverse tension assembly, the movable connecting assembly and the fixed assembly through the transmission assembly, and the transverse tension assembly applies a pushing force in the horizontal direction, so that the movable connecting assembly drives the CFRP to perform a stretching operation relative to the direction of the fixed assembly so as to apply a stretching load;
the longitudinal pressing component is sleeved on the CFRP unidirectional plate, is externally connected with the control component, and drives the longitudinal pressing component to carry out pressing operation on the CFRP through the externally connected control component so as to apply bending load.
Further, the fixing component comprises a reaction frame, a first reaction column and a second reaction column; the first counter-force column and the second counter-force column are arranged oppositely along the first direction, the first counter-force column and the second counter-force column are arranged oppositely along the second direction and the counter-force frame, an installation area of the movable connecting assembly is formed between the first counter-force column, the second counter-force column and the counter-force frame, and the movable connecting assembly and the counter-force frame are sequentially connected through the transmission assembly.
Further, the transmission assembly comprises a first screw rod piece and a second screw rod piece, and the first screw rod piece and the second screw rod piece are respectively arranged oppositely;
the first screw rod piece or the second screw rod piece comprises a screw rod and a plurality of nuts, the screw rod sequentially penetrates through the first counter-force column/the second counter-force column, the movable connecting component and the counter-force frame, the screw rod is used for coaxially connecting the first counter-force column/the second counter-force column, the movable connecting component and the counter-force frame, and the nuts are arranged on the screw rod.
Further, a schedulable space is reserved between the movable connecting component and the reaction frame, and the movable connecting component axially moves relative to the reaction frame in the schedulable space.
Further, the two ends of the movable connecting component are provided with reserved holes for installing the transmission component, and first connecting holes for being matched and connected with the torsion component are symmetrically formed in the middle of the movable component.
Further, the transverse tension assembly comprises a first jack and a second jack, wherein the first jack and the second jack are respectively positioned between the movable connecting assembly and the first counter-force column, and the second counter-force column is sleeved on the first screw rod piece and the second screw rod piece.
Further, the torsion assembly comprises a multi-angle conversion head, a first pin rod, a second pin rod and an anchor; the anchor is connected with the CFRP one-way plate, the anchor is movably connected with the conversion head through the second pin rod, and the conversion head is movably connected with the multi-angle conversion head through the first pin rod.
Further, the multi-angle conversion head is connected with the movable connecting component, a circle of second connecting holes are formed in the connecting ends of the multi-angle conversion head and the movable connecting component, the circle of second connecting holes are matched with the first connecting holes on the movable connecting component, and initial displacement angles are applied to CFRP unidirectional plates connected with the multi-angle conversion head through combined installation of the second connecting holes on the multi-angle conversion head and the first connecting holes on the movable connecting component at different angles. Further, the longitudinal pressing assembly comprises a rotating block, a steering roller and a fixed block; the center of the fixed block is provided with a notch through which the longitudinal pressing component can be assembled on the CFRP unidirectional plate; the rotating block is arranged at the periphery of the fixed block and can rotate along the circumference of the rotating block; the steering roller is arranged on the rotating block.
Further, the rotating block comprises a block body and a plurality of roller bodies, a through hole is formed in the middle of the block body, a circumferential arrangement groove is formed in the periphery of the fixed block, the roller bodies are arranged in the arrangement groove and are attached to the fixed block, and the block body can rotate along the circumference of the fixed block through the roller bodies.
The CFRP unidirectional plate pulling-bending-twisting coupling loading device provided by the invention is used for researching the mechanical properties of the CFRP unidirectional plate under the condition of complex stress, solves the problems that the loading mode of the conventional testing device is single, the requirements of the testing device for characterizing the material characteristics of actual engineering cannot be met, and provides technical support for the mechanical property test of the CFRP unidirectional plate.
Drawings
The invention is further described below with reference to the drawings and the detailed description.
FIG. 1 is a schematic diagram of a tensile-bending-torsion coupling test apparatus of the present CFRP plate;
FIG. 2 is a schematic diagram of the structure of a movable connection assembly in the pull-bend-twist coupling test device of the present CFRP plate;
FIG. 3 is a schematic view of the torsion assembly structure of the tensile-bending-torsion coupling test apparatus of the present CFRP plate;
FIG. 4 is a schematic diagram of the structure of the conversion head in the tensile-bending-torsion coupling test device of the CFRP plate;
FIG. 5 is a schematic diagram of a multi-angle conversion head in a pull-bend-twist coupling test apparatus of the present CFRP plate;
FIG. 6 is a partial view showing a longitudinal compression assembly in a tensile-bending-torsion coupling test apparatus of the present CFRP plate;
fig. 7 is a schematic diagram showing the disassembly of the longitudinal compression assembly in the tensile-bending-torsion coupling test device of the CFRP plate.
The following is a description of the components in the drawings:
100. the hydraulic actuator comprises a fixed assembly 110, a reaction frame 120, a first reaction column 130, a second reaction column 200, a drive assembly 210, a screw 220, a first nut 230, a second nut 240, a third nut 300, a movable joint assembly 310, a preformed hole 320, a first connecting hole 400, a transverse tension assembly 410, a first jack 420, a second jack 500, a torsion assembly 510, a multi-angle conversion head 511, a first pin hole 512, a second connecting hole 513, a first pin 520, a conversion head 521, a second pin 522, a second pin hole 523, a third pin hole 530, an anchor 600, a longitudinal compression assembly 610, a rotary block 611, a block 612, a roller 613, a seating groove 614, a cage 615, a mounting groove 620, a fixed block 621, a notch 630, a steering roller 700, and a CFRP unidirectional plate.
Detailed Description
The invention is further described with reference to the following detailed drawings in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the implementation of the invention easy to understand.
The existing CFRP unidirectional plate mechanical property test device mostly adopts a torsion test machine, a universal test machine and the like to limit the placement of test pieces, is unfavorable for the utilization of space and the adjustment of the test pieces, and cannot effectively realize a pull-torsion coupling test.
In this regard, the invention provides a CFRP unidirectional plate pulling-bending-twisting coupling loading device which can be used for researching the mechanical properties of the CFRP unidirectional plate under the condition of complex stress, solves the problems that the loading mode of the conventional testing device is single, cannot meet the requirements of the testing device for representing the material characteristics of actual engineering, and provides technical support for the mechanical property test of the CFRP unidirectional plate.
The CFRP unidirectional plate pulling-bending-torsion coupling loading device is provided with the mechanism capable of synchronously pulling, bending and torsion operation, so that the tensile load, the bending load and the torsion load are applied to the sample simultaneously, and the axial line deformation, the bending deformation and the torsion angle deformation generated by the sample can be measured simultaneously, thereby realizing the effective pulling-bending-torsion coupling test on the CFRP unidirectional plate.
In the CFRP unidirectional plate pulling-bending-torsion coupling loading device, when the stretching, bending and torsion operations are simultaneously applied to the sample, the mutual influence among corresponding operating mechanisms is less, and the pulling-torsion loading precision can be ensured.
Referring to fig. 1, an example of a construction of the CFRP unidirectional sheet pulling-bending-twisting coupling loading device provided in this embodiment is shown.
The CFRP unidirectional plate pulling-bending-twisting coupling loading device comprises a first loading unit and a second loading unit, wherein the first loading unit and the second loading unit are oppositely arranged, a loading area of the CFRP unidirectional plate is formed in the middle of the loading unit, two ends of the CFRP unidirectional plate are respectively connected with the first loading unit and the second loading unit, and a tensile load, a bending load and a torsion load can be synchronously applied to the CFRP unidirectional plate through the first loading unit and the second loading unit.
Referring to fig. 1, the first loading assembly or the second loading assembly includes a transmission assembly 200, a movable coupling assembly 300, a fixed assembly 100, a lateral tension assembly 400, a longitudinal pressing assembly 600, and a torsion assembly 500.
The fixed assembly 100 includes a reaction frame 110, a first reaction column 120, and a second reaction column 130.
The reaction frame 110 in this embodiment is preferably a triangular reaction frame, and in theory, a triangle has stability, so that stability of the test device during placement can be ensured.
The first reaction column 120 and the second reaction column 130 are disposed opposite to the reaction frame, and the first reaction column 120 and the second reaction column 130 are disposed symmetrically, a gap is left between the first reaction column 120 and the second reaction column 130 and the reaction frame, a mounting area of the movable connection assembly 300 is formed, and the first reaction column 120, the second reaction column 130, the movable connection assembly 300 and the reaction frame 110 are sequentially connected through the transmission assembly 200.
The transmission assembly 200 includes a first screw member and a second screw member, which are disposed opposite to each other, and the first and second reaction columns 120 and 130 are connected to the reaction frame 110 by the first and second screw members.
The first screw member or the second screw member includes a screw 210, a first nut 220, a second nut 230, and a third nut 240.
The screw 210 sequentially penetrates the first reaction column 120/the second reaction column 130, the movable connection assembly 300 and the reaction frame 110, the first reaction column 120/the second reaction column 130 are coaxially connected with the reaction frame 110 through the screw 210, and simultaneously, the first nut 220, the second nut 230 and the third nut 240 are both arranged on the screw 210.
The first nut 220 is disposed on the first side of the reaction frame 110 and is attached to the reaction frame 110, so as to limit the reaction frame 110, and prevent the reaction frame 110 from being separated from the screw 210 during the driving and stretching process, thereby affecting the reliability of the loading device during operation.
The third nut 240 is disposed on the first side of the first reaction column 120/second reaction column 130 and is attached to the first reaction column 120/second reaction column 130, so as to lock and limit the first reaction column 120/second reaction column 130, thereby preventing the first reaction column 120/second reaction column 130 from being separated from the screw and affecting the operation of the loading device.
The second nut 230 is disposed on a second side of the reaction frame 110, leaving a dispatchable gap between the second nut 230 and the second side of the reaction frame 110, the second nut 230 being axially movable relative to the second side of the reaction frame 110 in a relaxed state.
The movable connection assembly 300 is used for connecting the CFRP unidirectional plate 700 with the screw 210, referring to fig. 2, two ends of the movable connection assembly 300 are provided with preformed holes 320 for installing the screw 210, and the movable connection assembly 300 is arranged between the first reaction column 120/the second reaction column 130 and the reaction frame 110 and connected with the first reaction column 120/the second reaction column 130 and the reaction frame 110 by passing the screw 210 through the preformed holes 230.
Meanwhile, since a schedulable space is left between the second nut 230 and the second side of the reaction frame 110, the movable connection assembly 300 provided between the reaction frame 110 and the second nut 230 can axially move along the screw 210 and the second side of the reaction frame 110 as the second nut 230 in a loose state, and longitudinally stretch the CFRP unidirectional sheet 700 connected to the movable connection assembly 300.
Meanwhile, the movable coupling assembly 300 is symmetrically provided at the middle thereof with a first coupling hole 320 for coupling with the torsion assembly 500.
The lateral tension assembly 400 cooperates with the movable connection assembly 300 to apply lateral tension to the CTRP plate 700, and the lateral tension assembly 400 includes a first jack 410 and a second jack 420, the first jack 410 and the second jack 420 being respectively located between the movable connection assembly 300 and the first reaction column 120, and the second reaction column 130 being sleeved on the first screw member and the second screw member.
The first jack 410 and the second jack 420 apply a horizontal pushing force, so that the movable connection assembly 300 moves axially toward the reaction tripod 110, and simultaneously pulls the CFRP unidirectional plate 700 of the movable connection assembly 300 to apply a transverse pulling force, and finally, the CFRP unidirectional plate 700 generates a tensile stress state.
Referring to fig. 3, the torsion assembly 500 includes a multi-angle conversion head 510, a conversion head 520, and an anchor 530, and the torsion assembly 500 is connected with the movable connection assembly 300 through the multi-angle conversion head 510, and the torsion load of the CFRP unidirectional sheet 700 connected with the torsion assembly 500 is achieved through the multi-angle connection between the multi-angle conversion head 510 and the movable connection assembly 300.
Further, the anchorage 530 includes an upper clamping plate and a lower clamping plate, which are disposed opposite to each other, and a clamping area adapted to the CFRP unidirectional plate 700 is formed between first ends of the upper clamping plate and the lower clamping plate.
Referring to fig. 4, the conversion head 520 has a square groove structure formed by matching a rear plate and side walls symmetrically distributed at the upper and lower sides, and a corresponding installation groove area is formed at the middle area of the two side walls, and is matched with the anchor 530, so that the anchor 530 can be accommodated therein. Meanwhile, corresponding second pin holes 522 are correspondingly formed in the middle areas of the two side walls, so that one end of the anchor 530 is conveniently arranged in the mounting groove, the second pin 521 penetrates through the conversion head 520 and the anchor 530, the conversion head 520 is movably connected with the anchor 530, and the anchor 530 can rotate around the second pin 521 in the first direction relative to the conversion head 520.
Meanwhile, a connection plate is provided on the rear plate of the conversion head 520, and a third pin hole 523 is provided thereon, which is connected with the multi-angle conversion head 510 by being provided with a first pin 513 in cooperation.
Specifically, referring to fig. 5, the multi-angle conversion head 510 has a square groove structure formed by matching a rear plate and side walls symmetrically distributed on both sides.
The two side walls are oppositely provided with first pin holes 511, and the first pin rods 513 penetrate through the first pin holes 513 of the multi-angle conversion head 510 and the third pin holes 523 of the conversion head 520 to movably connect the conversion head 520 with the multi-angle conversion head 510, so that the anchor 530 can rotate around the first pin rods 513 in a second direction relative to the multi-angle conversion head 510.
Through the cooperation of the conversion head 520 and the multi-angle conversion head 510, the anchorage 530 can rotate in two dimensions, so that when the coaxiality between the anchorage 530 and the conversion head 520 and the multi-angle conversion head 510 changes in the tensile operation and/or torsion operation process of the anchorage 530, the anchorage 530 swings and adjusts relative to the conversion head 520 and the multi-angle conversion head 530 according to the stress change, and the tensile force of the conversion head 520 and the multi-angle conversion head 510 on the anchorage 530 is always coaxial with the anchorage 530, thereby ensuring that the CFRP unidirectional plate 700 always receives the tensile force in the same axial direction, effectively avoiding the stress of the CFRP unidirectional plate 700 in other directions, improving the stability of the stress when the CFRP unidirectional plate 700 is tested, avoiding damage to the CFRP unidirectional plate 700, and ensuring the accuracy of the subsequent performance test results.
A circle of second connecting holes 512 are circumferentially formed on the rear plate of the multi-angle conversion head 510, and are matched with the first connecting holes 320 on the movable connecting assembly 300, so that the initial torsion of the CFRP one-way plate 700 connected with the multi-angle conversion head 510 can be realized by combining the second connecting holes on the multi-angle conversion head 510 with the first connecting holes 320 on the 512 movable connecting assembly 300 at different angles, and finally, the CFRP one-way plate 700 generates torsion stress state.
The longitudinal pressing member 600 is used to apply a downward load to the CFRP unidirectional sheet 700, and the longitudinal pressing member 600 is disposed at the middle of the CFRP unidirectional sheet 700.
Referring to fig. 6, which is a schematic view of a partial structure of a longitudinal pressing assembly without a cage in a pull-bend-twist coupling test apparatus of the present CFRP plate, the longitudinal pressing assembly 600 includes a rotating block 610, a fixed block 620 and a steering roller 630.
The fixing block 620 is provided with a notch 621 at the center, and the notch 621 is sized to fit the CFRP unidirectional sheet 700 for mounting the CFRP unidirectional sheet 700, and the longitudinal pressing assembly 600 is mounted at the middle of the CFRP unidirectional sheet 700 through the notch 621.
The rotating block 610 is disposed at the periphery of the fixed block 620 and can rotate along the circumference of the fixed block 620.
Referring to fig. 7, the rotating block 610 includes a block body 611, a plurality of roller bodies 612, and a retainer 614, wherein a through hole is formed in the middle of the block body 611 and forms a circumferential mounting groove 613 with the outer periphery of the fixed block 620, and the retainer 614 is disposed in the mounting groove 613 and fixedly connected with the fixed block 620.
The retainer 614 is provided with a plurality of mounting grooves 615, the plurality of rod bodies 612 are arranged in the mounting grooves 615 and are attached to the block body 611, and the block body 611 can rotate along the circumference of the fixed block 620 through the plurality of roller bodies 612.
The plurality of roller bodies 612 can be uniformly isolated by arranging the retainer 614 in the mounting groove 613, so that friction caused by mutual interference is avoided.
The steering roller 630 is disposed on the rotating block 610, and is connected to and loaded by common test equipment such as an actuator or a jack, and the steering roller 630 is pressed by the test equipment, so that the CFRP unidirectional sheet 700 generates a bending stress state.
Meanwhile, the steering roller 630 arranged on the rotating block 610 can rotate relative to the fixed block through the rotating block 610 in the loading process, so that the stress in other directions generated by the rotation of the rotating block 610 is counteracted, the stress in other directions generated when the steering roller 630 is loaded to drive the CFRP unidirectional plate 700 to bend can be avoided, damage to the CFRP unidirectional plate 700 is avoided, the accuracy of the follow-up performance test result is ensured, and the torque is not influenced.
In summary, the tensile load, the bending load and the torsional load are simultaneously applied to the CFRP unidirectional sheet 700 by the first loading unit and the second loading unit.
According to the scheme, the transverse tension assembly 400, the longitudinal pressing assembly 600 and the torsion assembly 500 are arranged on the first loading unit or the second loading unit according to the situation, and can carry out unidirectional tension, bending and torsion loading on the CFRP unidirectional plate 700.
The specific implementation and application process of the CFRP unidirectional plate pull-torsion coupling loading device are specifically described below with reference to specific structures of the CFRP unidirectional plate pull-torsion coupling loading device.
When the CFRP unidirectional plate pulling-bending-twisting coupling loading device is applied, in order to effectively test the mechanical properties of the CFRP unidirectional plate sample 700, a corresponding test control assembly can be further introduced, and the test control assembly is controlled to be connected with the first jack 410, the second jack 420 and the steering roller 630 in the CFRP unidirectional plate pulling-bending-twisting coupling loading device, so that corresponding control instructions are formed according to the mechanical property requirements of the CFRP unidirectional plate to control the first jack 410, and the second jack 420 and the steering roller 630 to perform organic coordination actions.
The specific configuration of the test control assembly is not limited herein, and may be specifically determined according to actual requirements.
Therefore, when the CFRP unidirectional plate tensile-bending-torsion coupling loading device is used for testing the mechanical properties of the CFRP unidirectional plate, the device is arranged firstly, and the specific process is as follows:
s1: the first loading device and the second loading device are installed, the reaction frame 110, the first reaction column 120 and the second reaction column 130 are fixed on the operation platform through foundation bolts, and threaded holes are reserved in the reaction frame, the movable connecting assembly 300, the first reaction column 120 and the second reaction column 130 according to the diameter of the screw assembly.
S2: the reaction frame 110, the movable connection assembly 300, the first reaction column 120 and the second reaction column 130 are connected into a whole by the first screw rod piece and the second screw rod piece which are oppositely arranged and sequentially penetrate through the reaction frame 110, the movable connection assembly 300, the first reaction column 120 and the second reaction column 130, and the first nut 220, the second nut 230 and the third nut 240 are respectively arranged on the screw rod 210 to limit the reaction frame 110, the first reaction column 120 and the second reaction column 130.
S3: the first jack 410 and the second jack 420 are respectively sleeved between the first counter-force column 120, the second counter-force column 130 and the movable connecting assembly 300, and the CFRP unidirectional plate 700 is connected with the multi-angle conversion head 510 through an anchor 530; the multi-angle conversion head 510 and the movable connection assembly 300 are connected.
S5: notch 621 on longitudinal pressure applicator assembly 600 is fitted over CFRP unidirectional sheet 700 and top deflection roller 630 is fitted with the test control assembly.
After the arrangement of the device is completed, the initial torsion of the CFRP unidirectional sheet 700 can be achieved according to the combined installation of the second connection holes 512 on the multi-angle conversion head 510 and the first connection holes 320 on the movable connection frame 300 at different angles, and finally the CFRP unidirectional sheet 700 can generate a torsion stress state.
Secondly, the first jack 410, the second jack 420 and the steering roller 630 in the CFRP unidirectional plate pulling-bending-twisting coupling loading device are controlled and connected through corresponding test control components, and the first jack 410, the second jack 420 and the steering roller 630 are controlled by corresponding control instructions according to the mechanical property requirements of the CFRP unidirectional plate:
specifically, the test control assembly firstly controls the actions of the first jack 410 and the second jack 420, synchronously drives the movable connecting assembly 300 to axially move towards the reaction frame 110, and simultaneously pulls the CFRP unidirectional plate 700 of the movable connecting assembly 300 to apply a transverse pulling force, so that the CFRP unidirectional plate 700 is in a tensile stress state.
Because the anchors 530 that are clamped and connected to the two ends of the CFRP unidirectional plate 700 are respectively pinned (i.e., connected in a swinging manner) with the multi-angle conversion head 510 and the conversion head 520, the anchors 530 can rotate in two dimensions, so that when coaxiality between the anchors 530 and the conversion head 520 and between the anchors 530 and the multi-angle conversion head 510 is changed in the stretching operation and/or torsion operation process, the anchors 530 can swing and adjust relative to the conversion head 520 and the multi-angle conversion head 510 according to the stress change, the mutual influence of the stretching operation and the torsion operation can be avoided, and the negative bending moment generated at the anchor connection position of the CFRP unidirectional plate 700 can be avoided, thereby ensuring the accuracy of the subsequent performance test result.
Next, the test control assembly applies a pressing force to the steering roller 630, which drives the steering roller 630 to apply a downward/upward pressure to the CFRP unidirectional sheet 700, so that the CFRP unidirectional sheet 700 is bent.
When the steering roller 630 is driven by the test control assembly to lift pressure, the steering roller 630 can rotate relative to the CFRP unidirectional plate 700 through the roller body 612 inside, so that self-adaptive adjustment is realized, stress generated by the CFRP unidirectional plate 700 in other directions is effectively avoided, tension and torsion can be ensured, torque is not mutually interfered, and tension torsion loading precision is ensured.
Therefore, the CFRP unidirectional plate pulling-bending-twisting coupling loading device provided by the embodiment can provide pulling-bending-twisting coupling load for the CFRP unidirectional plate, so that the mechanical property of the CFRP unidirectional plate under the condition of complex stress is studied, the problem that the loading mode of the conventional testing device is single, the requirement of the testing device for representing the material property of the actual engineering cannot be met is solved, and technical support is provided for the mechanical property test of the CFRP unidirectional plate.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. The tensile-bending-torsion coupling test device for the CFRP unidirectional plate is characterized by comprising a first loading unit and a second loading unit, wherein the first loading unit and the second loading unit are oppositely arranged, and a loading area of the CFRP unidirectional plate is formed in the middle and used for placing the CFRP unidirectional plate to be tested;
the first loading unit or the second loading unit comprises a transmission assembly, a movable connecting assembly, a fixed assembly, a transverse tension assembly, a longitudinal pressing assembly and a torsion assembly;
the torsion component is connected with the CFRP unidirectional plate and is connected at different angles relative to the movable connecting component, and the CFRP unidirectional plate connected with the torsion component can be subjected to torsion operation so as to apply torsion load;
the transverse tension assembly is sleeved on the transmission assembly and coaxially connects the transverse tension assembly, the movable connecting assembly and the fixed assembly through the transmission assembly, and the transverse tension assembly applies a pushing force in the horizontal direction, so that the movable connecting assembly drives the CFRP to perform a stretching operation relative to the direction of the fixed assembly so as to apply a stretching load;
the longitudinal pressing component is assembled on the CFRP unidirectional plate, is externally connected with the control component, and drives the longitudinal pressing component to carry out pressing operation on the CFRP through the externally connected control component so as to apply bending load.
2. The device of claim 1, wherein the fixing assembly comprises a reaction frame, a first reaction column and a second reaction column; the first counter-force column and the second counter-force column are arranged oppositely along the first direction, the first counter-force column and the second counter-force column are arranged oppositely along the second direction and the counter-force frame, an installation area of the movable connecting assembly is formed between the first counter-force column, the second counter-force column and the counter-force frame, and the movable connecting assembly and the counter-force frame are sequentially connected through the transmission assembly.
3. The device for testing the tensile-bending-torsional coupling of the CFRP unidirectional plate according to claim 1, wherein the transmission assembly comprises a first screw member and a second screw member, and the first screw member and the second screw member are respectively arranged opposite to each other;
the first screw rod piece or the second screw rod piece comprises a screw rod and a plurality of nuts, the screw rod sequentially penetrates through the first counter-force column/the second counter-force column, the movable connecting component and the counter-force frame, the screw rod is used for coaxially connecting the first counter-force column/the second counter-force column, the movable connecting component and the counter-force frame, and the nuts are arranged on the screw rod.
4. The device for testing the tensile-bending-torsional coupling of the CFRP unidirectional plate according to claim 2, wherein a schedulable space is reserved between the movable connecting component and the reaction frame, and the movable connecting component axially moves relative to the reaction frame in the schedulable space.
5. The device for testing the tensile-bending-torsional coupling of the CFRP unidirectional plate according to claim 1, wherein the two ends of the movable connecting assembly are provided with reserved holes for installing the transmission assembly, and the middle of the movable assembly is symmetrically provided with first connecting holes for being matched and connected with the torsional assembly.
6. A pull-bend-twist coupling test device for a CFRP unidirectional sheet according to claim 3 wherein the lateral tension assembly comprises a first jack and a second jack, the first jack and the second jack being respectively positioned between the movable connection assembly and the first reaction column, and the second reaction column being sleeved on the first screw member and the second screw member.
7. The apparatus of claim 1, wherein the torsion assembly comprises a multi-angle conversion head, a first pin, a second pin, and an anchor; the anchor is connected with the CFRP one-way plate, the anchor is movably connected with the conversion head through the second pin rod, and the conversion head is movably connected with the multi-angle conversion head through the first pin rod.
8. The device according to claim 5, wherein the multi-angle conversion head is connected to the movable connection assembly, and the connection end of the multi-angle conversion head and the movable connection assembly is provided with a circle of second connection holes, which are matched with the first connection holes on the movable connection assembly, so that the initial displacement angle is applied to the CFRP unidirectional plate connected by the multi-angle conversion head by installing the second connection holes on the multi-angle conversion head and the first connection holes on the movable connection assembly in combination at different angles.
9. The apparatus of claim 1, wherein the longitudinal pressing assembly comprises a rotating block, a steering roller and a fixed block; the center of the fixed block is provided with a notch through which the longitudinal pressing component can be assembled on the CFRP unidirectional plate; the rotating block is arranged at the periphery of the fixed block and can rotate along the circumference of the rotating block; the steering roller is arranged on the rotating block.
10. The device for testing the tensile-bending-torsional coupling of the CFRP unidirectional plate according to claim 9, wherein the rotating block comprises a block body and a plurality of roller bodies, wherein a through hole is formed in the middle of the block body and forms a circumferential arrangement groove with the periphery of the fixed block, and the roller bodies are arranged in the arrangement groove and are attached to the fixed block, so that the block body can rotate along the circumference of the fixed block through the roller bodies.
CN202310359598.2A 2023-04-06 2023-04-06 Tensile-bending-torsion coupling test device for CFRP unidirectional plate Pending CN116593283A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310359598.2A CN116593283A (en) 2023-04-06 2023-04-06 Tensile-bending-torsion coupling test device for CFRP unidirectional plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310359598.2A CN116593283A (en) 2023-04-06 2023-04-06 Tensile-bending-torsion coupling test device for CFRP unidirectional plate

Publications (1)

Publication Number Publication Date
CN116593283A true CN116593283A (en) 2023-08-15

Family

ID=87592652

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310359598.2A Pending CN116593283A (en) 2023-04-06 2023-04-06 Tensile-bending-torsion coupling test device for CFRP unidirectional plate

Country Status (1)

Country Link
CN (1) CN116593283A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117147280A (en) * 2023-10-30 2023-12-01 东方蓝天钛金科技有限公司 Clamping device for tension bending torsion testing of aircraft metal bracket

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117147280A (en) * 2023-10-30 2023-12-01 东方蓝天钛金科技有限公司 Clamping device for tension bending torsion testing of aircraft metal bracket
CN117147280B (en) * 2023-10-30 2024-01-09 东方蓝天钛金科技有限公司 Clamping device for tension bending torsion testing of aircraft metal bracket

Similar Documents

Publication Publication Date Title
US8402837B1 (en) System for field testing helical piles
KR101546638B1 (en) Brace member
CN116593283A (en) Tensile-bending-torsion coupling test device for CFRP unidirectional plate
CN104792516B (en) A kind of H types blade of vertical axis wind turbine fatigue test of structure device and method
KR20100073882A (en) Loading device for load cell calibration
CN104807630A (en) H-shaped vertical axis wind turbine blade static force structure test device and method
KR101179229B1 (en) Tension and Torque Simultaneous Loading Test Bench
CN110926922A (en) Loading device for compression, bending and torsion composite stress test
CN109724782B (en) Strength test testing device
CN113138070A (en) Frame and floor beam connection structure static test device
CN114088553B (en) Large-tonnage inhaul cable test device
CN109060509B (en) Flexible multifunctional large-tonnage cable test system
JP4862880B2 (en) Structure testing machine
JP5375772B2 (en) Axis adjuster for material testing machine
CN111426547A (en) Flexible pipeline bending coupling nondestructive loading test device and use method thereof
EP2336455A1 (en) Construction systeme for strengthening an existing structure with tension sheets and a respective anchoring device and method therefore
CN115639086A (en) Method for testing torsion performance of steel beam
CN108406289B (en) Moment loading device
RU2668953C1 (en) Method for determining bearing capacity of tubular anchor and installation for implementation thereof
CN212780317U (en) Loading device for bending and twisting test of structural member
CN113340711A (en) Reinforced wallboard static fatigue load application test device
CN116660022A (en) FRP plate pull-torsion coupling loading device
JP2020101450A (en) Load application device
CN115014769A (en) Torque loading device of engine mounting bracket
CN216433337U (en) In-situ self-reaction testing device for transverse shearing of embedded channel

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination