KR101447507B1 - Horizontality and verticality shear test apparatus and method for gouge - Google Patents

Abstract

The present invention relates to an apparatus and a method for horizontal and vertical shear tests of a single-layer gouge which uniformly increases pressure of an applied gouge to apply horizontal and vertical pressure in order to perform a shear test. The apparatus for horizontal and vertical shear tests of single-layer gouge includes a first curved force applying device having a curvature at a front end for a point contact when applying horizontal pressure to a sample; a first block transferring the horizontal pressure applied by the first curved force applying device to the sample, supporting one side of the sample, and having a pressure sensor measuring the pressure of the first curved force applying device; a sliding unit disposed at a lower portion of the first block and guiding the movement of the first block; a second block supporting the other side of the sample; and a second curved force applying device having a curvature at a front end for a point contact when applying vertical pressure to the sample, wherein the second curved force applying device holds the sample when the first curved force applying device applies the horizontal pressure to the sample.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a horizontal and vertical shearing test apparatus,

The present invention relates to a device for and a method for testing horizontal and vertical shearing of a single layer gauge for performing a shearing test by applying horizontal and vertical pressures uniformly to a coated gauge.

In recent years, interest in the development of earthquake and fault activity quantification technology is increasing.

In particular, until September 2012, the number of domestic earthquakes with a magnitude of 2.0 or more was 52, a magnitude of 3.0 or more occurred at 8 times, and 3 had a bad earthquake. This is more than the 43.6 times of the annual average number of earthquakes (1999-2011) and more than 47 times in the third quarter of 2009, when the annual occurrence rate was 60 times.

Since these earthquakes are natural disasters that can not only destroy the environment but also harm human life, researches on faults have been actively conducted to prevent them.

The prior art related to the present invention is Korean Patent Application Publication No. 2011-0098182 (published on Sep. 01, 2011), which discloses a lower front sheave having a bottom plate and an open top, both sides of which are acrylic plates And an upper shear box having upper and lower openings formed on both sides of the lower shear box and made of an acrylic plate and having a height higher than that of the lower shear box, And a load plate for applying a vertical force to an open upper portion of the upper shear box to visually observe the shear failure phenomenon by the transparent acrylic with a vertical compression is disclosed .

However, the conventional shearing test apparatus has a problem in that when the shearing test is performed by the vertical compression method, the sample may be separated.

In addition, the conventional shearing test apparatus has a problem that it is difficult to accurately measure the pressure at the shear critical point.

Particularly, the conventional shearing test apparatus has a problem that it is not possible to perform the shear test of Gouge, which is a powdered single-layer clay, to grasp the characteristics of the single layer.

Therefore, there is a desperate need to implement a shear test of Gaussian to quantify the earthquake and fault activity.

Patent No.: Korea Intellectual Property Office Publication No. 2011-0098182 (published on September 1, 2011) Name of patent: Shearing test equipment

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art as described above, and it is an object of the present invention to prevent the sample from escaping and accurately measure the pressure at the time of shear critical stress, And is capable of uniformly applying pressure to the coated gauge, thereby providing a horizontal and vertical shearing test apparatus for a single-layer gauge.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art as described above, and it is an object of the present invention to prevent the sample from escaping and accurately measure the pressure at the time of shear critical stress, The present invention provides a horizontal and vertical shearing test method of a single-layer gauge capable of uniformly applying pressure to a coated gauge.

To this end, the horizontal and vertical vertical shearing tester of the single-layer gauge according to the present invention is characterized in that a first bending force applying unit having a curvature at the front end and a horizontal pressure applied by the first bending force applying unit A first block having a pressure sensor for supporting one side of the sample and measuring a pressure of the first bending force applying unit, a sliding unit provided below the first block for guiding movement of the first block, And a second bending force applicator having a curvature at the front end for point contact when a normal pressure is applied to the specimen, wherein the second bending force applying unit includes a second block for supporting the sample at the time of applying the horizontal pressure of the first bending force .

The sample according to the embodiment of the present invention is composed of a plurality of plates with their surfaces coated with gouge, and the radius of curvature is 2 cm to 30 cm.

In addition, the apparatus for testing horizontal and vertical shearing of single-layer gauss according to an embodiment of the present invention further includes a third block having a pressure sensor for measuring a vertical pressure of a second bending force applicator, And a concave portion provided straightly at the center of the upper surface of the sliding unit are engaged with each other.

The second bending force machine according to the embodiment of the present invention includes a force portion for applying a normal pressure to the sample and a body portion to be fastened to the force portion, and the fastening is fastened by a plurality of springs.

Further, the apparatus for testing horizontal and vertical shearing of single-layer gauss according to an embodiment of the present invention includes guide rods provided on the left and right sides of a first bending force applicator, a first bending force applicator provided on a front end of the first bending force applicator, And a second guide plate provided at a rear end of the first bending presser and guiding the bending force by a guide bar, wherein the first guide plate and the second guide plate And has a hole through which the first bending force unit passes and a hole through which the guide rod passes.

The horizontal and vertical shearing test apparatus for a single-layer gauge according to an embodiment of the present invention includes a first support plate having a groove into which a flexural force is inserted, a second support plate for supporting the second block, And a support plate provided on the upper surface of the other end of the second support plate.

(A) constructing a sample with a plurality of plates, the surfaces to which the gouge is applied are in contact with each other, (B) holding the sample, (C) horizontally and vertically Increasing the pressure in the sample with a first bending force applying force; and (D) sensing the pressure at the point at which the gauge is broken by the pressure applied in step (C).

To this end, the step (C) further comprises increasing the pressure on the sample with a second bending force applying a vertical pressure, wherein the radius of curvature of the second bending force is between 2 cm and 30 cm.

To this end, the first bending forceter according to the present invention has a curvature at the front end and a radius of curvature of 2 cm to 30 cm.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

Prior to that, terms and words used in the present specification and claims should not be construed in a conventional and dictionary sense, and the inventor may properly define the concept of the term in order to best explain its invention It should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention.

According to various embodiments of the present invention, there is an effect that both horizontal and vertical shear tests can be performed by performing a shear test by pressing a sample composed of a plurality of plates coated with gauges horizontally or vertically.

According to various embodiments of the present invention, when the sample is pressed horizontally or vertically, the pressure can be uniformly applied to the sample by performing point contact, so that it is possible to measure the accurate pressure occurring at the time of the shear threshold.

Therefore, according to various embodiments of the present invention, since the horizontal and vertical pressures can be uniformly applied to the sample by point contact, the shear force of the gauge can be accurately measured, and the characteristics of the single layer can be easily grasped There is a predictable effect on earthquakes.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view illustrating a horizontal and vertical shear testing apparatus 100 of single-layer gouge according to an embodiment of the present invention. FIG.
2 is a cross-sectional view illustrating the engagement of the sliding unit 150 with the first block 120 according to an embodiment of the present invention.
3 is an exemplary view showing in detail a second bending machine 130 according to an embodiment of the present invention.
4 is an exemplary view showing a front end 111 of a first bending force applicator 110 according to an embodiment of the present invention.
FIG. 5 is a photograph showing a horizontal and vertical shearing test apparatus 100 of a single-layer gauge according to an embodiment of the present invention set for performing a horizontal shear test.
FIG. 6 is a photograph showing a sample in which a sample (A) is provided in a horizontal and vertical shear testing apparatus 100 of a single-layer gauge according to an embodiment of the present invention.
Figure 7 is a flow chart showing a horizontal and vertical shear testing method 200 of single layer gouge according to another embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The objectives, specific advantages, and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements are assigned the same number as much as possible even if they are displayed on different drawings. Also, the terms " first ", " second ", and the like are used to distinguish one element from another element, and the element is not limited thereto.

In addition, the singular forms used below include plural forms unless the phrases expressly have the opposite meaning. Throughout the specification, when an element is referred to as "including" an element, it means that it can include other elements as well, without departing from the other elements unless specifically stated otherwise.

The same reference numerals are given to the same members in Figs. 1 to 7.

The basic principle of the present invention is to uniformly apply pressure to the applied gouge by applying pressure to the gouge applied to a plurality of plates by point contact in a horizontal or vertical manner using a first bending exciter and a second bending exciter having curvature.

First, the force and the pressure used in the embodiment of the present invention mean the force or the pressure, and the same meaning is used in explaining the present invention, and the bending can be interpreted as having a curvature.

Also, gouge, fault gouge, and single layer clay have the same meaning.

In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view illustrating a horizontal and vertical shear testing apparatus 100 of a single-layer gauge according to an embodiment of the present invention.

Referring to FIG. 1, a horizontal and vertical shear testing apparatus 100 for a single-layer gauge according to an embodiment of the present invention includes a first bending force applicator 110 having a curvature at a front end for point contact when a horizontal pressure is applied to the sample A, A pressure sensor for transmitting the horizontal pressure applied by the first bending force applicator 110 to the specimen A and supporting one side of the specimen A and measuring the pressure of the first bending force applicator 110 A sliding unit 150 provided at a lower portion of the first block 120 for guiding the movement of the first block 120 and a second unit 120 for supporting the other side of the sample A, A block 140 and a second bending force applicator 130 having a curvature at the front end for point contact when applying a normal pressure to the sample A. [

The horizontal and vertical vertical shearing test apparatus 100 according to the embodiment of the present invention constructed as shown in FIG. 1 will be described in detail as follows.

First, Sample (A) is started.

The sample (A) is composed of a plurality of plates (a, b, c) in which the surfaces coated with gauges are in contact with each other.

Here, Fault Gauge or Gouge, also called fault gauge, refers to a single-layer clay in the form of crushed powder formed between fault surfaces by fault movement.

In order to carry out the shear test of such gauges, a powdered single-layer clay is applied between a plurality of plates (a, b, c).

When the sample A is prepared in this way, the sample A is held between the first block 120 and the second block 140.

That is, one side of the sample (A) is supported by the first block (120), and the other side of the sample (A) is supported by the second block (140).

Referring to FIG. 1, the first block 120 is formed in an 'a' shape and the second block 140 is formed in a 'b' shape in which the left and right sides are reversed. This is to support the side surface as well as the bottom surface of the sample (A).

After holding the specimen A in the first block 120 and the second block 140 as described above, the pressure is applied to the first block 120 by the first bending force applicator 110.

The first block 120 must be mobile in order to transfer the applied pressure to the sample A. To this end, a sliding unit 150 is provided on a lower surface of the first block 120.

The first block 120 and the sliding unit 150 are engaged with each other as shown in FIG.

2 is a cross-sectional view illustrating engagement of the sliding unit 150 with the first block 120 according to an embodiment of the present invention.

2, the first block 120 includes a convex portion 121 extending straight at the center of the lower surface, and the sliding unit 150 includes a concave portion 151 extending straight at the center of the upper surface Respectively. The convex portion 121 and the concave portion 151 thus provided are engaged with each other.

Accordingly, when the first block 120 receives pressure from the first bending force machine 110 at one side, it may move to the other side and transmit pressure to the sample A.

Here, the second bending force applicator 130 holds the sample A in the upper portion.

The second bending force applicator 130 is utilized to hold the sample A during the horizontal shear test. The second bending force applicator 130 is used to apply pressure to the upper portion of the sample A during the vertical shear test.

3 is an exemplary view showing in detail a second bending force applicator 130 according to an embodiment of the present invention.

Referring to FIG. 3, the second bending force machine 130 according to the embodiment of the present invention includes a force portion 132 for applying a vertical pressure to the sample A or holding the sample A during the horizontal shear test, And a body part (131) fastened to the part (132).

Here, the front end 135 of the body part 131 also has a curvature shape and touches the rear end of the pressing part 132.

A pressure means (not shown) for applying pressure is provided at the upper end of the body portion 131. The pressure means generates pressure by hydraulic pressure or electric power.

Here, the body part 131 and the pressing part 132 are provided with a plurality of engaging means 133, respectively. The spring 134 is connected to the engaging means 133 so that the body 131 and the engaging part 132 are engaged with each other.

It is preferable that a plurality of spring members 134 are provided, but it is more preferable to include at least three spring members.

When the pressing portion 132 is in point contact with the sample and the pressure is applied vertically by fastening the body portion 131 and the pressing portion 132 by the spring 134, the front end 135 is pressed against the body portion 131 And the force generated when the engaging portion 132 abuts.

By this force, the front end 135 and the rear end of the engaging part 132 move finely with each other.

Therefore, the front end 135 is finely moved and fixed by the spring 134 until the sample 134 and the pressing portion 132 make stable point contact.

As described above, when the sample (A) and the holding portion (132) make stable point contact, the vertical pressure is uniformly transferred to the sample (A).

That is, the second bending strength section 130 can uniformly apply pressure to the specimen A by fixing the specimen A during the horizontal shear test or making point contact with the specimen A during the vertical shear test.

Thus, when the horizontal or vertical pressure is gradually increased to the sample A, the gouge applied at a specific moment is discharged to between the plates a, b, and c.

That is, at this moment when the applied gauge is destroyed, a sudden pressure change occurs. In order to detect the sudden pressure change, the first block 120 may include a pressure sensor 121.

Here, the pressure sensor 121 provided in the first block 120 measures the horizontal pressure during the horizontal front end test and the pressure sensor (not shown) also measures the vertical pressure during the vertical front end test do.

Preferably, the number of pressure sensors provided in the first block 120 and the third block 180 is not limited.

On the other hand, the second block 140 supports the sample A from being pushed back by the pressure applied to the sample A from the first block 120 direction.

Accordingly, it is preferable that the lower surface of the second block 140 is fixed to the upper surface of the support plate 160.

The second block 140 may further include a second support plate 162 to withstand pressure transmitted from the first bending force applicator 110.

The second support plate 162 is preferably made of a material having a tensile strength capable of withstanding the pressure transmitted from the first bending force applicator 110.

The following is a detailed description of the first bending force applicator 110 according to an embodiment of the present invention with reference to FIG.

4 is an exemplary view showing the front end 111 of the first bending force applicator 110 according to the embodiment of the present invention.

Referring to FIG. 4, the first bending force machine 110 according to the embodiment of the present invention has a curvature in a shape of a front end 111 '.

Here, the radius of curvature is preferably 2 cm to 30 cm, and since the curvature is an inverse number of the radius of curvature, there is an inverse relationship that the curvature decreases as the radius of curvature increases.

The reason why the front end portion 111 has a curvature is that it is difficult to apply uniformly when a plurality of plates a, b, and c are coated with gauss, so that the imbalance in pressure applied to the sample A .

Therefore, the curvature is provided so as to facilitate point contact as in the shape of the front end portion 111, so that the pressure applied to the sample (A) is designed to be uniform.

Particularly, the radius of curvature of the front end 111 is preferably 2 cm to 30 cm.

It is preferable that the first bending forceer 110 according to the embodiment of the present invention, which is thus formed, starts hydraulic pressure or electric power as a power source.

Referring to FIG. 1 again, a first support plate 161 is provided at the end of the first bending force applicator 110, and a first guide 163 and a second guide 164 are provided.

The first support plate 161 is provided on the support plate 160 for supporting the first flexure /

The first guide 163 and the second guide 164 are provided at the center thereof with holes (not shown) through which the first bending force applicator 110 passes, and on the left and right sides of the first bending force applicator 110 A plurality of guide rods 170 are provided.

Similarly, the first guide 163 and the second guide 164 are provided with holes (not shown) through which the plurality of guide rods 170 pass.

Here, the first guide 163, the second guide 164, and the plurality of guide rods 170 serve as guides when the first bending force applicator 110 is advanced or retracted. In particular, the first bending force applicator 110 ) Precisely at a specific point in the first block 120, particularly in the center, at the time of advancement.

The horizontal and vertical shear test apparatus 100 of the single-layer gauge constructed as described above will be described with reference to Fig.

FIG. 5 is a photograph showing a configuration in which the horizontal and vertical shearing apparatus 100 of the single-layer gauss according to the embodiment of the present invention is set for performing the horizontal shear test.

Referring to FIG. 5, it can be seen that the first block 120 and the sample A are excluded from the horizontal and vertical shear test apparatus 100 of the single-layer gouge according to the embodiment of the present invention.

5, a real photograph of the horizontal and vertical shearing test apparatus 100 according to the embodiment of the present invention will be described.

First, the bottom of the apparatus 100 is provided with a support plate 160.

Here, since the support plate 160 is mounted with various components on its upper surface, it is desirable that the support plate 160 has a tensile strength capable of supporting it.

Therefore, it is preferable that the support plate 160 is made of metal, but not limited thereto, and synthetic resin, ceramics and the like can be also made of the support plate 160 if the support plate has a supporting tensile strength.

A second block 140, a sliding unit 150, a first support plate 161, and a second support plate 162 are fixed on the support plate 160.

First, the end of the first bending force applicator 110 is inserted and fixed in the groove 161a of the first support plate 161.

The first guide 163 and the second guide 164 are formed with holes (not shown) at the center thereof to pass the first bending force applicator 110 and the first bending force applying device The first fixing means 110a is fixed so that the front end portion 111 of the fixing member 110 protrudes. Similarly, a second fixing means 110c for fixing the rear end of the first bending force applicator 110 is provided at the center of the second guide 164.

The first guide 163 and the second guide 164 are provided with a first guide hole 163a through which two guide rods 170 pass respectively on the left and right sides of the first bending force applicator 110, And a hole 164a, respectively.

Since the first guide 163, the second guide 164 and the plurality of guide rods 170 are provided as described above, the first bending forceer 110 accurately presses a specific point of the first block 120 at the time of advancing, can do.

Here, the specific point is preferably the center point of the first block 120, in order to uniformly apply pressure to the sample A.

A power line 110b for supplying power is provided at the center of the first bending force applicator 110.

Here, since the power supplied to the first bending force applicator 110 can use electric power or hydraulic pressure, no one power source is specified.

Holes (not shown) through which two guide rods 170 pass are provided on the left and right sides of the first support plate 161 and the second support plate 162, respectively. The guide rod 170 having passed through the hole has a screw thread at its end, and the nut 170a is fixed.

The setting for the horizontal shear test of the sample (A) in the horizontal and vertical shear testing apparatus 100 of the single-layered gauss according to the embodiment of the present invention will be described in more detail with reference to FIG.

FIG. 6 is a photograph showing a sample in which a sample (A) is provided in a horizontal and vertical shear testing apparatus 100 of a single-layer gauge according to an embodiment of the present invention.

Referring to FIG. 6, it can be seen that the horizontal block vertical shearing test apparatus 100 according to the embodiment of the present invention includes the first block 120 and the sample A, unlike FIG.

In the description of FIG. 6, the description overlapping with FIG. 5 is omitted.

First, the sample A is held between the first block 120 and the second block 140.

The sample (A) is formed by applying a gouge, which is a powdered single-layer clay, between a plurality of plates (a, b, c).

The sample (A) is held by the second bending force applicator 130 shown in Fig.

Referring to FIG. 3, it can be seen that a block 181 is provided in place of the third block 180 shown in FIG. 1, in which the force portion 132 of the second bending force applicator 130 is point-contacted.

Accordingly, the second bending force applicator 130 holds the sample A by gradually touching the block 181.

In order to perform the shear test of the vertically held specimen A, the first bending force applicator 110 is advanced in the direction of the first block 120.

The first block 120 is moved in the direction of the sample A by the concave portion 151 of the sliding unit 150 engaged with the convex portion 130 of the first block 120, ) To the sample (A).

When the pressure in the sample (A) is gradually increased, the gauge applied at a specific moment is discharged to between the plates (a, b, c) and the instantaneous pressure sensor 130 senses abrupt pressure.

That is, the pressure at which the applied gauge is destroyed.

Since the pressure sensing part 131 of the pressure sensor 130 is in contact with the second support plate 162, when the gauge is discharged by the pressure, the pressure sensing part 131 is pushed toward the second support plate 162, Is detected.

The measured pressure value is transmitted to the outside via the signal line 123.

Here, since the front end 111 of the first bending force applicator 110 has a constant curvature, it can make a point contact with the first block 120 and apply a uniform pressure to the sample A.

Preferably, the radius of curvature of the front end 111 of the first bending forceter 110 is 2 cm to 30 cm, and the radius of curvature of the force portion 131 of the first bending forceter 130 is also the first bending force But it is not necessarily limited thereto.

7 is a flow chart illustrating a horizontal and vertical shear testing method 200 of single layer gouge according to another embodiment of the present invention.

Referring to FIG. 7, the horizontal and vertical shear test method 200 for single-layer Gauges according to another embodiment of the present invention includes the steps of (A) forming a sample with a plurality of plates, A step S230 of holding the sample (S220), a step S230 of applying pressure to the sample with the first bending force machine 110, and a step (C) of applying pressure to the sample at the time when the gauge is destroyed by the pressure applied in the step (S240).

The horizontal and vertical shearing test method 200 of the single-layered gauss according to another embodiment of the present invention constructed as shown in FIG. 7 will be described in detail as follows.

First, the sample A is formed of a plurality of plates in which the surfaces to which the gouge is applied are in contact with each other (S210).

The sample A thus configured is held between the first block 120 and the second block 140 (S220).

Then, the pressure is gradually increased to the first block 120 by the first bending force applicator 110 in order to press the held sample A (S230).

Preferably, when the horizontal shearing test is performed on the sample (A), the second bending force applicator 130 can fix the sample A from the vertical direction.

Here, when the vertical shearing test is performed, the second bending force applicator 130 may apply the pressure for the vertical shearing test to the sample A.

Here, the front end portion 111 of the first bending force applicator 110 has a curvature and thereby makes a point contact with the first block 120 by the point contact with the first block 120. As a result, The pressure can be applied.

Here, it is preferable that the front end 111 is in point contact with the center of the first block 120.

On the other hand, since the front end of the force portion 132 of the second bending force applicator 130 has a curvature and is in point contact with the block 181 or the third block 180 provided on the upper portion of the sample A, The sample A can be held or a vertical pressure can be applied.

The horizontal or vertical pressure is continuously applied until the applied gouge is broken (S235).

When the applied gauge is destroyed by pressurization in this way, the pressure at the time of destruction is sensed (S240).

Preferably, the first block 120 is provided with a sensor capable of measuring a horizontal shearing force, and the third block 180 is provided with a sensor capable of measuring a vertical shearing force.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limiting the scope of the invention as defined by the appended claims. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

100: Single-layer Gauging shear test apparatus 110: First bending force machine
110a: first fixing means 110b: power line
110c: second fixing means 111: front end portion
120: first block 123: signal line
130: second bending force applying unit 131: pressure sensing unit
140: second block 150: sliding unit
160: receiving plate 161: first supporting plate
162: second support plate 163: first guide
163a: first guide hole 164: second guide
164b: second guide hole 170: guide rod
170a: Nut A: Sample
a, b, c: a plurality of plates

Claims (12)

A first bending expander having a curvature at the front end for point contact when horizontal pressure is applied to the sample;
And a pressure sensor for transmitting the horizontal pressure applied by the first bending force applicator to the sample and supporting one side of the sample and measuring the pressure of the first bending force applying device, A first block having a convex portion;
A sliding unit provided at a lower portion of the first block and having a straight concave portion at the center so as to be engaged with the convex portion to guide movement of the first block;
A second block supporting the other side of the sample; And
And a second bending force exerting a curvature at the front end for point contact when a vertical pressure is applied to the sample,
Wherein the second bending force applying unit includes a force applying unit for applying a normal pressure to the sample and a body having a curvature at a front end to be coupled to the force applying unit, Let
Horizontal Vertical Shear Test System for Single Layer Gaussian.
[2] The method according to claim 1,
Wherein the surfaces to which the gauges are applied are composed of a plurality of plates abutting each other
Wherein the horizontal and vertical shear test apparatuses of the single-layer gauge are provided.
[2] The method of claim 1,
2 to 30 cm
Wherein the horizontal and vertical shear test apparatuses of the single-layer gauge are provided.
The method according to claim 1,
And a third block having a pressure sensor for measuring a vertical pressure of the second bending force applying unit
Wherein the horizontal and vertical shear test apparatuses of the single-layer gauge are provided.
delete The method according to claim 1,
Wherein the engagement of the engaging portion and the body portion is performed by a plurality of springs and the plurality of springs are adjusted until the engaging portion makes point contact with the sample and is fixedly pressed
Wherein the horizontal and vertical shear test apparatuses of the single-layer gauge are provided.
The method according to claim 1,
Two guide rods provided on the left and right sides of the first bending force applicator, respectively;
A first guide plate provided at a front end of the first bending force applying unit and guiding the first bending force applying unit with the guide rod; And
And a second guide plate provided at a rear end of the first bending force applying unit to guide the bending force applying unit with the guide rod
And a shear test apparatus for a single layer.
8. The apparatus of claim 7, wherein the first guide plate and the second guide plate
A hole through which the first bending force is passed and a hole through which the guide rod passes
And a shear test apparatus for a single layer.
The method of claim 8,
A first support plate having a groove into which the bending force is inserted;
A second support plate for supporting the second block; And
Further comprising a support plate having the first support plate on the upper side of the longitudinal end on one side and the second support plate on the upper side of the other end side
And a horizontal and vertical vertical shearing test apparatus.
(A) constructing a sample with a plurality of plates in which the surfaces to which Gaugi is applied are in contact with each other;
(B) a second bending force applying unit including a force applying unit for applying a normal pressure to the sample and a body unit having a curvature at the front end to be coupled with the force applying unit is adjusted to be fixed in point contact with the sample by a plurality of springs, Holding a sample;
(C) increasing the pressure on the sample by a first bending force applying unit having a curvature at the front end to apply a horizontal pressure to the first block having a straight convex portion at the center so as to engage with the concave portion on the sliding unit provided with the concave portion And increasing the pressure in the sample with the second flexural force applying vertical pressure; And
(D) sensing a pressure at a time point at which the gauge is destroyed by the pressure applied in the step (C);
Wherein the horizontal shear test method comprises the steps of:
The method of claim 10,
And the radius of curvature of the second bending force machine is 2 cm to 30 cm
Wherein the horizontal and vertical vertical shear test method comprises:
11. The apparatus of claim 10,
Curvature at the front end,
The radius of curvature is from 2 cm to 30 cm
Wherein the shear test method comprises the steps of:

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