Shear test appatatus for engineered cementitious composites and the shear test method

Abstract

This relates to a shear testing apparatus and shear testing method for high-toughness composites, A universal testing machine having a lifting unit provided on the upper part of a work table; an upper jig detachably installed at the lower part of the lifting head of the lifting unit of the universal testing machine and pressing the upper corner portion of a high-toughness composite in a vertical direction; a lower jig detachably installed on the upper part of the work table of the universal testing machine and supporting the lower corner portion of the high-toughness composite; a shear measuring bar detachably installed via a first connecting bracket on a first fixing bracket attached to the lower part of the upper corner portion of the front of the high-toughness composite and pressing the measuring rod of a shear displacement measuring sensor; a shear displacement measuring sensor detachably installed on a second fixing bracket attached to the upper part of the lower corner portion of the front of the high-toughness composite; and a bending measuring bar detachably installed via a third connecting bracket on a third fixing bracket attached to the inner side of one corner portion of the front of the high-toughness composite and pressing the measuring rod of a bending displacement measuring sensor; By performing a shear test on a high-toughness composite simply and accurately through a high-toughness composite shear test device comprising a bending displacement measuring sensor detachably installed on a fourth fixing bracket attached to the inner side of the other corner portion of the front of the high-toughness composite, This enables a reduction in testing costs and significantly contributes to the manufacturing of high-quality, high-toughness composites based on reliable and accurate test results.

Description

Technology Field

[0001] The present invention relates to a shear testing device and a shear testing method for high-toughness composites, and more specifically, to a method for easily testing the shear strength of high-toughness composites primarily used for seismic reinforcement of masonry structures. Background Technology

[0002] Recently, research on the development and application of high-toughness composites having strain hardening and multiple cracking characteristics upon flexural or tensile failure is being actively conducted worldwide.

[0003] For such high-toughness composites, it is possible to manufacture fiber-reinforced cement composites with diverse performance characteristics through a combination of fiber material, shape, and cement composite properties; therefore, establishing rational material design methods to satisfy the mechanical performance required for the material is of paramount importance.

[0004] As fiber materials used in fiber-reinforced cement composites, organic fibers such as polyvinyl alcohol (PVA), polyethylene (PE), and polypropylene (PP), in addition to steel fibers, are attracting attention, and the length, cross-sectional area, and cross-sectional shape of the fibers are becoming more diverse.

[0005] Meanwhile, the mechanical stiffness of high-toughness composites varies depending on the presence or absence of reinforcing materials and the fiber mixing ratio, and also varies depending on the thickness, type of reinforcing material, and reinforcement method. Therefore, it is necessary to appropriately combine the fiber mixing ratio and reinforcing materials according to the application, such as seismic reinforcement.

[0006] Accordingly, when a new high-toughness composite is designed, it becomes necessary to conduct various tests to determine whether it possesses appropriate mechanical stiffness and whether it has superior characteristics compared to existing high-toughness composites.

[0007] Patent Document 1 below discloses a shear test apparatus comprising a test piece support means for supporting both ends of a test piece, a load application means installed on the test piece support means for applying pressure to one side of the test piece to generate shear force within the test piece, and a deformation amount measuring part installed on the test piece support means for measuring the deformation amount of the test piece. Prior art literature

[0008] Republic of Korea Published Patent Application No. 10-2016-0038186 (Published April 7, 2016) The problem to be solved

[0009] The shear test apparatus and shear test method according to the prior art, including Patent Document 1, had a problem in that they could not effectively test mechanical strengths such as shear strength of high-toughness composites, which have various performance characteristics depending on the combination of fiber material, shape, and cement composite properties, because the shape of the test object that can be tested through them is different.

[0010] The present invention aims to solve the problems of the shear testing apparatus and shear testing method according to the prior art described above, and its purpose is to provide a shear testing apparatus and shear testing method for high-toughness composites that enable convenient testing of mechanical performance, such as shear strength, of high-toughness composites, which are primarily used for seismic reinforcement of masonry structures. means of solving the problem

[0011] To achieve the above-mentioned purpose, the shear test device for a high-toughness composite according to the present invention comprises: a universal testing machine having a lifting unit provided on the upper part of a work table; an upper jig detachably installed on the lower part of the lifting head of the lifting unit of the universal testing machine and pressing the upper corner portion of the high-toughness composite in a vertical direction; a lower jig detachably installed on the upper part of the work table of the universal testing machine and supporting the lower corner portion of the high-toughness composite; a shear measuring bar detachably installed via a first connecting bracket on a first fixing bracket attached to the lower part of the upper corner portion of the front of the high-toughness composite and pressing the measuring rod of a shear displacement measuring sensor; and a shear displacement measuring sensor detachably installed on a second fixing bracket attached to the upper part of the lower corner portion of the front of the high-toughness composite.

[0012] The high-toughness composite shear test device according to the present invention is characterized by comprising: a bending measuring bar that presses a measuring rod of a bending displacement measuring sensor, which is detachably installed via a third connecting bracket on a third fixing bracket attached to the inner side of one corner portion of the front surface of the high-toughness composite; and a bending displacement measuring sensor that is detachably installed on a fourth fixing bracket attached to the inner side of the other corner portion of the front surface of the high-toughness composite.

[0013] The upper jig of the high-toughness composite shear test device according to the present invention is characterized in that a pressing part for pressing the high-toughness composite is provided at the lower part of a coupling part inserted and coupled to a lifting head, and a Λ-shaped contact groove corresponding to the upper corner part of the high-toughness composite is provided at the lower part of the pressing part, and the lower jig is characterized in that a supporting part is provided at the upper part of a landing part that lands on a table, and a Ψ-shaped contact groove corresponding to the lower corner part of the high-toughness composite is provided at the upper part of the supporting part.

[0014] The high toughness composite shear test device according to the present invention is characterized in that a shear measuring bar is screw-fastened to a first fixing nut installed on a first connecting bracket, and a contact disc is provided at the bottom of the shear measuring bar to contact the upper end of the measuring rod of a shear displacement measuring sensor, and a bending measuring bar is screw-fastened to a third fixing nut installed on a third connecting bracket, and a contact disc is provided at the inner end of the bending measuring bar to contact the inner end of the measuring rod of a bending displacement measuring sensor.

[0015] The shear test method for a high-toughness composite according to the present invention comprises: a universal testing machine having a lifting unit provided on the upper part of a work table; an upper jig detachably installed on the lower part of the lifting head of the lifting unit of the universal testing machine and pressing the upper corner portion of the high-toughness composite in a vertical direction; a lower jig detachably installed on the upper part of the work table of the universal testing machine and supporting the lower corner portion of the high-toughness composite; a shear measuring bar detachably installed via a first connecting bracket on a first fixing bracket attached to the lower part of the upper corner portion of the front of the high-toughness composite and pressing the measuring rod of a shear displacement measuring sensor; and a shear displacement measuring sensor detachably installed on a second fixing bracket attached to the upper part of the lower corner portion of the front of the high-toughness composite. A shear test method for a high-toughness composite using a shear test device comprising: a bending measuring bar that presses the measuring rod of a bending displacement measuring sensor, which is detachably installed via a third connecting bracket on a third fixing bracket attached to the inner side of one corner portion of the front of the high-toughness composite; and a bending displacement measuring sensor that is detachably installed on a fourth fixing bracket attached to the inner side of the other corner portion of the front of the high-toughness composite; the method comprising: a displacement measuring sensor installation step of installing a shear displacement measuring sensor and a bending displacement measuring sensor on the high-toughness composite which is the test object; and a high-toughness composite mounting step of mounting the high-toughness composite, on which the shear displacement measuring sensor and the bending displacement measuring sensor are installed, between the work table and the lifting unit of a universal testing machine through an upper jig and a lower jig. It is characterized by including a displacement measurement step of lowering the lifting unit of the universal testing machine and measuring the shear deformation and bending deformation of the high-toughness composite through a shear displacement measurement sensor and a bending displacement measurement sensor.

[0016] The shear test method for a high-toughness composite according to the present invention is characterized by attaching and installing a first fixing bracket, a second fixing bracket, a third fixing bracket, and a fourth fixing bracket on the lower part of the upper corner of the front of a square high-toughness composite, the upper part of the lower corner, the inner part of one corner, and the inner part of the other corner, in the step of installing displacement measuring sensors, wherein corners are located at the top, bottom, left, and right sides of the square high-toughness composite, and installing a shear measuring bar in the form of a vertical screw shaft, a shear displacement measuring sensor in the form of a measuring rod installed to be extendable on the upper part of the main body, a bending measuring bar in the form of a horizontal screw shaft, and a bending displacement measuring sensor in the form of a measuring rod installed to be extendable on one side of the main body, on the first fixing bracket, second fixing bracket, third fixing bracket, and fourth fixing bracket.

[0017] The shear test method for a high-toughness composite according to the present invention is characterized by, in the step of mounting the high-toughness composite, connecting an upper jig having a pressing part provided at the bottom of the connecting part and a V-shaped contact groove provided at the bottom of the pressing part to the lifting head of a lifting unit, installing a lower jig having a supporting part provided at the top of the landing part and a V-shaped contact groove provided at the top of the supporting part at the bottom of the lifting head of the upper part of the work table, inserting the lower corner of the high-toughness composite into the V-shaped contact groove of the lower jig, and lowering the lifting unit of the universal testing machine so that the V-shaped contact groove of the upper jig installed on the lifting head comes into close contact with the upper corner of the high-toughness composite. Effects of the invention

[0018] According to the high toughness composite shear testing device and shear testing method of the present invention, a square-shaped high toughness composite, which is the test object, can be stably mounted on a universal testing machine, and the amount of shear deformation and the amount of bending deformation can be accurately measured through a shear measuring sensor and a bending measuring sensor during the lowering operation of the universal testing machine.

[0019] According to the shear testing apparatus and shear testing method for high-toughness composites according to the present invention, the mechanical strength of a newly designed high-toughness composite can be easily tested, thereby reducing testing costs and contributing significantly to the manufacture of high-quality high-toughness composites based on reliable and accurate test results. Brief explanation of the drawing

[0020] FIG. 1 is a left side view of a high-toughness composite shear test device according to the present invention, FIG. 2 is a front view of a key part of a high-toughness composite shear test device according to the present invention, FIG. 3 is a perspective view of a key part of a high-toughness composite shear test device according to the present invention, FIG. 4 is a process flowchart of a high-toughness composite shear test method according to the present invention, and FIG. 5 is an example graph of test results by the high-toughness composite shear test method according to the present invention. Specific details for implementing the invention

[0021] The high-toughness composite shear test apparatus and shear test method according to the present invention will be described in detail below with reference to the attached drawings. For reference, the size, line thickness, etc. of the components shown in the drawings referenced in describing the present invention may be expressed somewhat exaggerated for ease of understanding.

[0022] Furthermore, the terms used in the description of the present invention are defined considering their functions within the invention and may vary depending on the user's or operator's intent, convention, etc. Accordingly, it is appropriate to define these terms based on the entire content of this specification.

[0023] Furthermore, in this application, terms such as 'comprising' and 'having' refer to the existence of specific numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not excluding in advance the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0024] In addition, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms, and the embodiments provided are merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention.

[0025] Therefore, the present invention is susceptible to various modifications and may take various forms, and embodiments (aspects or examples) are to be described in detail in the specification. However, this is not intended to limit the present invention to specific disclosed forms, and it should be understood that it includes all modifications, equivalents, and substitutions that fall within the technical scope of the present invention, and singular expressions used in this specification include plural expressions unless the context clearly indicates otherwise.

[0026] However, in describing the present invention, specific descriptions of well-known or known functions or configurations are omitted in order to clarify the gist of the invention.

[0027] In the following, "upward," "downward," "forward," "rearward," and other directional terms are defined based on the state depicted in the drawings.

[0028] FIG. 1 is a left side view of a high-toughness composite shear test device according to the present invention, FIG. 2 is a front view of a key part of a high-toughness composite shear test device according to the present invention, and FIG. 3 is a perspective view of a key part of a high-toughness composite shear test device according to the present invention.

[0029] The high toughness composite shear test device (100) according to the present invention includes a universal tester (110), an upper jig (120), a lower jig (130), a shear measuring bar (140), a shear displacement measuring sensor (150), a bending measuring bar (160), and a bending displacement measuring sensor (170).

[0030] The universal testing machine (110) is a machine that can perform various tests on materials, such as tensile testing, compression testing, and bending testing.

[0031] The universal testing machine (110) is configured such that a lifting unit (112) is provided on the upper part of a work table (111), and since the specific configuration thereof is obvious in the technical field to which the present invention belongs, a description thereof is omitted.

[0032] The upper jig (120) is a part that presses the upper corner of the high-toughness composite (200), which is the subject of the test, in a vertical direction, and is detachably installed at the lower part of the lifting head (113) of the lifting unit (112) of the universal testing machine (110).

[0033] The upper jig (120) has a shape in which a pressing part (122) for pressing a high-toughness composite is provided at the lower part of a coupling part (121) that is inserted and coupled to a lifting head (113), and a Χ-shaped contact groove (123) corresponding to the upper corner part of the high-toughness composite (200) is provided at the lower part of the pressing part (122).

[0034] The lower jig (130) is a part that supports the lower corner of the high-toughness composite (200) and is detachably installed on the top of the work table (111) of the universal testing machine (110).

[0035] The lower jig (130) has a shape in which a support member (132) is provided on the upper part of a landing member (131) that lands on a work table (111), and a V-shaped contact groove (133) corresponding to the lower corner of the high-toughness composite (200) is provided on the upper part of the support member (132).

[0036] The shear measuring bar (140) is a part that presses the measuring rod (152) of the shear displacement measuring sensor (150), and is detachably installed on a first fixing bracket (201) which is attached to the lower part of the upper corner of the front of the high toughness composite (200) through a first connecting bracket (141).

[0037] The shear measuring bar (140) is in the form of a screw shaft that penetrates the first connecting bracket (141) in the vertical direction and is screw-fastened to a first fixing nut (142) installed on the first connecting bracket (141), and a contact plate (143) is provided at the bottom that contacts the upper end of the measuring rod (152) of the shear displacement measuring sensor (150).

[0038] The shear displacement measuring sensor (150) is a part that measures shear displacement and is detachably installed on a second fixing bracket (202) attached to the upper part of the lower corner of the front of the high toughness composite (200).

[0039] The shear displacement measuring sensor (150) is formed such that a measuring rod (152) is installed so as to be extendable on the upper part of the main body (151), and is detachably coupled to the second fixing bracket (202) through a connecting piece (153) provided on the outer circumference of the main body (151).

[0040] The bending measuring bar (160) is a part that presses the measuring rod (172) of the bending displacement measuring sensor (170), and is detachably installed on a third fixing bracket (203) that is attached to the inner side of one corner of the front of the high toughness composite (200) through a third connecting bracket (161).

[0041] The bending measuring bar (160) is in the form of a screw shaft that penetrates the third connecting bracket (161) in the left-right direction and is screw-fastened to a third fixing nut (162) installed on the third connecting bracket (161), and a contact plate (163) is provided at the inner end to contact the inner end of the measuring rod (172) of the bending displacement measuring sensor (170).

[0042] The bending displacement measuring sensor (170) is a part that measures bending displacement and is detachably installed on a fourth fixing bracket (204) attached to the inner side of the other corner of the front of the high toughness composite (200).

[0043] The bending displacement measuring sensor (170) is formed such that a measuring rod (172) is installed in a retractable manner on the inner side of the main body (171), and is detachably coupled to the fourth fixing bracket (204) through a connecting piece (173) provided on the outer circumference of the main body (171).

[0044] The high toughness composite shear test device (100) according to the present invention can stably mount a high toughness composite (200), which is a test object, between the work table (111) and the lifting unit (112) of the universal tester (110) through the upper jig (120) and the lower jig (130), and can stably measure the shear displacement and bending displacement of the high toughness composite (200) through the shear measuring bar (140) and shear displacement measuring sensor (150) and bending measuring bar (160) and bending displacement measuring sensor (170) attached to the high toughness composite (200).

[0045] Figure 4 is a process flowchart of the high toughness composite shear test method according to the present invention.

[0046] Meanwhile, the high toughness composite shear test method according to the present invention is a method for testing the shear deformation and bending deformation of a high toughness composite through the high toughness composite shear test device (100) described above, and includes a displacement measurement sensor installation step, a high toughness composite mounting step, and a displacement measurement step.

[0047] The displacement measurement sensor installation step is the step of installing a shear displacement measurement sensor (150) and a bending displacement measurement sensor (170) on the high toughness composite (200) which is the test object.

[0048] In the displacement measurement sensor installation step, a first fixing bracket (201), a second fixing bracket (202), a third fixing bracket (203), and a fourth fixing bracket (204) are attached and installed on the lower part of the upper corner of the front of a square high-toughness composite (200) in which corners are located at the top, bottom, left, and right, and a measuring rod (152) is installed so as to be extendable on the upper part of the main body (151) and a shear displacement measurement sensor (150) in the form of a vertical screw shaft-shaped shear measuring bar (140) and a measuring rod (152) in the form of a horizontal screw shaft-shaped bending measuring bar (160) and a measuring rod (172) in the form of an extendable on one side of the main body (171) are installed. A bending displacement measuring sensor (170) of the installed type is installed.

[0049] In the above, the shear measuring bar (140) is installed by fastening it to the first fixing nut (142) installed on the first connecting bracket (141) so as to be movable in the vertical direction, and then the first connecting bracket (141) is fixedly installed on the first fixing bracket (201), and the shear displacement measuring sensor (150) is fixedly installed on the second fixing bracket (202) through the connecting piece (153) provided on the outer circumference of the main body (151).

[0050] After installing the shear measuring bar (140) and the shear displacement measuring sensor (150), the shear measuring bar (140) is moved toward the shear displacement measuring sensor (150) below it so that the contact plate (143) provided at the bottom of the shear measuring bar (140) comes into contact with the top of the measuring rod (152) of the shear displacement measuring sensor (150).

[0051] In the above, the bending measuring bar (160) is installed by fastening it to the third fixing nut (162) installed on the third connecting bracket (161) so that it can move in the left and right directions, and then the third connecting bracket (161) is fixedly installed on the third fixing bracket (203), and the bending displacement measuring sensor (170) is fixedly installed on the fourth fixing bracket (204) through the connecting piece (173) provided on the outer circumference of the main body (171).

[0052] After installing the bending measuring bar (160) and the bending displacement measuring sensor (170), the bending measuring bar (160) is moved toward the inner bending displacement measuring sensor (170) so that the contact plate (163) provided at the inner end of the bending measuring bar (160) compresses the measuring rod (172) of the bending displacement measuring sensor (170).

[0053] The high toughness composite mounting step is a step of mounting the high toughness composite (200), on which the shear displacement measuring sensor (150) and bending displacement measuring sensor (170) are installed, between the work table (111) and the lifting unit (112) of the universal testing machine (110) through the upper jig (120) and the lower jig (130).

[0054] In the high-toughness composite mounting step, an upper jig (120) having a pressing part (122) provided at the bottom of the connecting part (121) and a Λ-shaped contact groove (123) provided at the bottom of the pressing part (122) is connected to the lifting head (113) of the lifting unit (112), and a lower jig (130) having a supporting part (132) provided at the top of the landing part (131) and a Λ-shaped contact groove (133) provided at the top of the supporting part (132) is installed at the bottom of the lifting head (113) at the top of the work table (111).

[0055] Next, the lower corner portion of the high-toughness composite (200) is inserted into the V-shaped contact groove (133) of the lower jig (130), and the lifting unit (112) of the universal testing machine (110) is lowered so that the V-shaped contact groove (123) of the upper jig (120) installed on the lifting head (113) is in close contact with the upper corner portion of the high-toughness composite (200).

[0056] The displacement measurement step is a step of lowering the lifting unit (112) of the universal testing machine (110) and measuring the shear deformation and bending deformation of the high toughness composite (200) through the shear displacement measurement sensor (150) and the bending displacement measurement sensor (170).

[0057] In the displacement measurement step, the lifting head (113) of the lifting unit (112) of the universal testing machine (110) and the upper jig (120) mounted thereon are lowered to apply pressure to the upper corner of the high-toughness composite (200), and the amount of shear deformation and bending deformation according to the applied pressure are measured through the shear displacement measurement sensor (150) and the bending displacement measurement sensor (170).

[0058] In the displacement measurement step, the displacement measurement values ​​of the shear displacement measurement sensor (150) and the bending displacement measurement sensor (170) are transmitted to an analysis unit (not shown), and the operator can analyze the stiffness and other physical characteristics of the high toughness composite (200) through the shear displacement measurement values ​​and bending displacement measurement values ​​transmitted to the analysis unit.

[0059] Figure 5 is an example graph of test results by the high toughness composite shear test method according to the present invention.

[0060] The shear test method for a high-toughness composite according to the present invention enables the square-shaped high-toughness composite, which is the test object, to be stably mounted on a universal testing machine, and allows the shear deformation and bending deformation to be accurately measured through a shear measurement sensor and a bending measurement sensor during the lowering operation of the universal testing machine, thereby making it easy to test the mechanical strength of the high-toughness composite and enabling the derivation of reliable and accurate test results.

[0061] Although the invention made by the inventors has been specifically described according to the above embodiments, the present invention is not limited to the above embodiments and can be modified in various ways without departing from the gist thereof. Explanation of the symbols

[0062] 100 : High-toughness composite shear testing device 110 : Universal testing machine 120 : Upper jig 130 : Lower jig 140 : Shear measuring bar 150 : Shear displacement measuring sensor 160 : Bending measuring bar 170 : Bending displacement measuring sensor

Claims

Claim 1 delete Claim 2 delete Claim 3 A universal testing machine (110) having a lifting unit (112) provided on the upper part of a work table (111); an upper jig (120) that is detachably installed on the lower part of the lifting head (113) of the lifting unit (112) of the universal testing machine (110) and presses the upper corner portion of the high toughness composite (200) in a vertical direction; a lower jig (130) that is detachably installed on the upper part of the work table (111) of the universal testing machine (110) and supports the lower corner portion of the high toughness composite (200); and a first connecting bracket (141) that is detachably installed on the lower part of the upper corner portion of the front of the high toughness composite (200) via a first fixing bracket (201) and presses the measuring rod (152) of a shear displacement measuring sensor (150). A shear measuring bar (140); a shear displacement measuring sensor (150) detachably installed on a second fixing bracket (202) attached to the upper part of the lower corner portion of the front of the high toughness composite (200); a bending measuring bar (160) detachably installed via a third connecting bracket (161) on a third fixing bracket (203) attached to the inner side of one corner portion of the front of the high toughness composite (200), and pressing the measuring rod (172) of the bending displacement measuring sensor (170); The invention includes a bending displacement measuring sensor (170) that is detachably installed on a fourth fixing bracket (204) attached to the inner side of the other corner portion of the front surface of the high-toughness composite (200); wherein the upper jig (120) is provided with a pressing portion (122) that presses the high-toughness composite at the lower part of a coupling portion (121) that is inserted and coupled to a lifting head (113), and a Λ-shaped contact groove (123) corresponding to the upper corner portion of the high-toughness composite (200) is provided at the lower end of the pressing portion (122); and the lower jig (130) is provided with a support portion (132) at the upper part of a landing portion (131) that lands on a work table (111), and a Ψ-shaped contact groove (133) corresponding to the lower corner portion of the high-toughness composite (200) is provided at the upper end of the support portion (132). High-toughness composite shear test device. Claim 4 A universal testing machine (110) having a lifting unit (112) provided on the upper part of a work table (111); an upper jig (120) that is detachably installed on the lower part of the lifting head (113) of the lifting unit (112) of the universal testing machine (110) and presses the upper corner portion of the high toughness composite (200) in a vertical direction; a lower jig (130) that is detachably installed on the upper part of the work table (111) of the universal testing machine (110) and supports the lower corner portion of the high toughness composite (200); and a first connecting bracket (141) that is detachably installed on the lower part of the upper corner portion of the front of the high toughness composite (200) via a first fixing bracket (201) and presses the measuring rod (152) of a shear displacement measuring sensor (150). A shear measuring bar (140); a shear displacement measuring sensor (150) detachably installed on a second fixing bracket (202) attached to the upper part of the lower corner portion of the front of the high toughness composite (200); a bending measuring bar (160) detachably installed via a third connecting bracket (161) on a third fixing bracket (203) attached to the inner side of one corner portion of the front of the high toughness composite (200), and pressing the measuring rod (172) of the bending displacement measuring sensor (170); A high-toughness composite (200) comprising: a bending displacement measuring sensor (170) detachably installed on a fourth fixing bracket (204) attached to the inner side of the other corner portion of the front of the high-toughness composite (200); wherein a shear measuring bar (140) is screw-fastened to a first fixing nut (142) installed on a first connecting bracket (141), and a contact disc (143) is provided at the lower end of the shear measuring bar (140) to contact the upper end of the measuring rod (152) of the shear displacement measuring sensor (150), and a bending measuring bar (160) is screw-fastened to a third fixing nut (162) installed on a third connecting bracket (161), and a contact disc (163) is provided at the inner end of the bending measuring bar (160) to contact the inner end of the measuring rod (172) of the bending displacement measuring sensor (170). Shear test device. Claim 5 A universal testing machine (110) having a lifting unit (112) provided on the upper part of a work table (111); an upper jig (120) that is detachably installed on the lower part of the lifting head (113) of the lifting unit (112) of the universal testing machine (110) and presses the upper corner portion of the high toughness composite (200) in a vertical direction; a lower jig (130) that is detachably installed on the upper part of the work table (111) of the universal testing machine (110) and supports the lower corner portion of the high toughness composite (200); and a first connecting bracket (141) that is detachably installed on the lower part of the upper corner portion of the front of the high toughness composite (200) via a first fixing bracket (201) and presses the measuring rod (152) of a shear displacement measuring sensor (150). A high toughness composite shear test method using a high toughness composite shear test device (100) comprising: a shear measuring bar (140); a shear displacement measuring sensor (150) detachably installed on a second fixing bracket (202) attached to the upper part of the lower corner portion of the front of the high toughness composite (200); a bending measuring bar (160) detachably installed via a third connecting bracket (161) on a third fixing bracket (203) attached to the inner side of one corner portion of the front of the high toughness composite (200) and pressing the measuring rod (172) of a bending displacement measuring sensor (170); and a bending displacement measuring sensor (170) detachably installed on a fourth fixing bracket (204) attached to the inner side of the other corner portion of the front of the high toughness composite (200); wherein the test subject is A displacement measurement sensor installation step of installing a shear displacement measurement sensor (150) and a bending displacement measurement sensor (170) on a high-toughness composite (200); a high-toughness composite mounting step of mounting the high-toughness composite (200), on which the shear displacement measurement sensor (150) and the bending displacement measurement sensor (170) are installed, between the work table (111) and the lifting unit (112) of a universal testing machine (110) through an upper jig (120) and a lower jig (130); a displacement measurement step of lowering the lifting unit (112) of the universal testing machine (110) and measuring the shear deformation and bending deformation of the high-toughness composite (200) through the shear displacement measurement sensor (150) and the bending displacement measurement sensor (170).A shear test method for a high-toughness composite characterized by including Claim 6 In claim 5, during the displacement measurement sensor installation step, a first fixing bracket (201), a second fixing bracket (202), a third fixing bracket (203), and a fourth fixing bracket (204) are attached and installed on the lower part of the upper corner of the front of a square high-toughness composite (200) in which corners are located on the top, bottom, left, and right sides, and a shear displacement measurement sensor (150) in the form of a vertical screw shaft type shear measuring bar (140), a measuring rod (152) installed to be extendable on the upper part of the main body (151), a bending measuring bar (160) in the form of a horizontal screw shaft, and on one side of the main body (171) A high toughness composite shear test method characterized by installing a bending displacement measuring sensor (170) in a form in which a measuring rod (172) is installed to be extendable. Claim 7 In claim 5, during the high-toughness composite mounting step, an upper jig (120) having a pressing part (122) provided at the bottom of a connecting part (121) and a Λ-shaped contact groove (123) provided at the bottom of the pressing part (122) is coupled to the lifting head (113) of a lifting unit (112), and a lower jig (130) having a supporting part (132) provided at the top of a landing part (131) and a Λ-shaped contact groove (133) provided at the top of the supporting part (132) is installed at the bottom of the lifting head (113) on the top of a work table (111), then the bottom corner of the high-toughness composite (200) is inserted into the Λ-shaped contact groove (133) of the lower jig (130), and the lifting unit (112) of the universal testing machine (110) is lowered to the lifting head (113). A high toughness composite shear test method characterized by ensuring that the Λ-shaped contact groove (123) of the installed upper jig (120) is in close contact with the upper corner portion of the high toughness composite (200).

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