WO2014090298A1

WO2014090298A1 - Shear test device for mechanically testing material

Info

Publication number: WO2014090298A1
Application number: PCT/EP2012/075261
Authority: WO
Inventors: Eric RAETZSCH
Original assignee: Ima Materialforschung Und Anwendungstechnik Gmbh
Priority date: 2012-12-12
Filing date: 2012-12-12
Publication date: 2014-06-19
Also published as: DE112012007218B4; DE112012007218A5

Abstract

The invention relates to a shear test device for mechanically testing material, in particular for determining the shear characteristics of materials, comprising two clamping blocks for clamping each end of a test body to which a test force is applied in test force direction, the two clamping blocks being connected to each other such that they can be displaced in a plane relative to each other, parallel and transversally to the test force direction, and each of the two clamping blocks being connectable to a respective force contact point of a test machine, the aim of the invention being to produce a device for mechanically testing material, which improves the material testing of fibre-reinforced plastics such that reproducible experiment conditions can be achieved, a stress-free test body installation is made possible at the beginning of the experiment, and free transverse elongation of the test body is guaranteed such that transverse-elongation-induced normal strains are eliminated in the test cross-section. The problem is solved by arranging a guiding means on at least one clamping block, which guiding means can be connected to one of the force contact points such that the at least one clamping block can be displaced relative to the force contact point transversally to the test force direction.

Description

Shear test device for mechanical material testing

The invention relates to a device for mechanical material testing for determining the thrust characteristics of

Materials, in particular intralaminar shear characteristics of fiber reinforced plastics, under shear stress in accordance with current standards.

Typical thrust characteristics, such. As the 0.2% shear stress, the shear stress at 5% -Scherverformung, the

Shear strength and the secant shear modulus are defined mechanical material properties that are used to determine mechanical material behavior.

Numerous devices for the determination of intralaminar

Thrust characteristics are known from technical standards and regulations. The devices used differ with respect to the Prüfkörpereinspannung and the load or Prüfkrafteinleitung in the test specimen, namely with

positive test force introduction, in particular on the Prüfkörperflanken or the broadsides, and non-positive Prüfkrafteinleitung over the end faces of the longitudinal edges of the specimen. In the devices with non-positive load application are solutions with a

Thrust generation by clamping screws as well

Hydraulic cylinders known.

Frequently used in practice materials, such as wood or fiber-reinforced plastics, have preferred directions with respect to certain material properties. These directional properties, commonly referred to as anisotropy, highlight them as a construction material for weight optimized structures. directional Properties include the stiffness and strength of the material.

A special case of anisotropy is orthotropy.

Orthotropic is a material that has three symmetric planes perpendicular to each other in relation to its

has directional properties. This behavior occurs. a. in the case of plastics with unidirectional or bidirectional fiber reinforcement, for example in the case of a laminate with so-called balanced angle composite ((±) ° fiber orientation) or so-called cross-composite ((0/90) ° fiber orientation). If an orthotropic material is claimed along its orthotropic axes, i. H. in the

loaded two-dimensional case parallel to the fiber direction or perpendicular to the fiber direction, no strain-sliding coupling occurs. The Coupling Coefficients of the 3x3 Disc Compliance Matrix, which gives the strain tensor as the response to the stress on the strain

Stress tensor linked, become zero.

Is claimed outside the Orthotropieachsen, the orthotropic material reacts with respect to the

Stress direction anisotropic and there is a stretch-sliding coupling on. The 3x3 slab compliance matrix is fully occupied. This has the consequence that in addition to the shear longitudinal and transverse strains occur at external shear stress.

The aforementioned transition from orthotropy to anisotropy already occurs when, due to the deformation of the

Test body whose fiber orientation relative to the outer test loads changes such that the load is no longer along the Orthotropieachsen. Applied to the shear test on orthotropic or anisotropic material, the occurring expansion-sliding coupling demands on suitable kinematic boundary conditions during the test. In particular, for the determination of the shear strength unimpeded transverse strain of importance. A blocking of the transverse movement leads to normal stresses in the test cross-section and influences the quality of the shear strength determination. In addition, induced transverse forces in the load line perpendicular to the test direction can falsify the test force measurement.

As a further effect of anisotropic materials, at even load, the so-called disk load,

Plate distortions, d. H. Curvature or twisting,

occur. Even if test laminates are usually designed to be center-symmetrical in such a way that a decoupling of disks and plate deformation is produced, even small layer thickness deviations can cancel the center symmetry and thus the decoupling again. The design of the

The test device must take this into account by means of a suitable clamping of the test specimen in conjunction with a guide kinematics.

To minimize normal strains that occur during a

Shear loading may occur in addition to the shift, are different devices from the prior art

known .

Thus, DE 10 2010 006 163 AI discloses a device for mechanical material testing for determining the

Thrust characteristics of materials with a large ratio of the sample side length to the sample thickness, wherein he test body is clamped in a push frame of articulated frame parts frictionally by means of clamping jaws. The

Test specimen has a free square surface, which is followed by four tabs for clamping in the push frame. The pivot points of the joints are located above the corners of the free square surface. When applying an external load to two diagonally

opposite corners of the push frame deforms the Thrust frame to a rhombus, forcing the test specimen on its shape. To hold down, ie to prevent the buckling of the free square surface, pressure plates are applied to these front and back sides. By tensioning the test specimen by means of clamping jaws, can

However, during the tensioning process normal stresses arise in the free square area, whereby no

Deformation under pure thrust seems possible, so that the given rhombus shape determines the intralaminar

Thrust characteristics for pure thrust disturbs. Furthermore, by the pressure plates to prevent buckling of the specimen further additional normal stresses in

Thickness direction of the specimen introduced. In addition, during the testing process, considerable frictional forces can arise between the surface of the free square surface and the printing plates, as a result of which

Voltages could be induced.

The Iosipescu test, named after its developer, produces a shear load on a V-notched test specimen cut into the test specimen to a depth of 20% of the specimen width. The test was originally developed for metallic isotropic materials, but ASTM D5379 standardises a design of the test method and corresponding test equipment for composite materials. In a Iosipescu experiment, a flat test piece, which is notched on both sides, is form-locked in a C-shaped manner via wedges at both of its ends via the end faces of its longitudinal flanks

Clamp blocks clamped. While a terminal block is fixed, the other terminal block is guided to generate a thrust load in the test cross section through a column and moved in the longitudinal direction. However, due to the anisotropy, the guidance results in an enormous amount of material testing of fiber-reinforced plastics

Stretching disabilities. An improved device for carrying out the Iosipescu test, based on ASTM D5379, is disclosed in KR 100727107 B1. The clamping of the specimen takes place here also on the faces of the longitudinal edges of

Test specimen in C-shaped clamping blocks. The connection of the clamping blocks of the clamping device to the testing machine, which at opposite ends of their open load line

Usually has two points of force application, but here is articulated, so that a wide degree of freedom arises. This allows normal stresses in

Test cross section are minimized. The handling of this device, however, seems extremely difficult, especially a tension-free Prüfkörpereinbau with freely rotatable

Clamping. The possible introduction of internal

Stress in the test cross section through the use of clamping wedges during clamping process is still given.

Liu has reported in his article "An improved shear test fixture using Iosipescu specimen" (Mechanics of Cellulosic

Materials, AMD Vol. 231, MD Vol. 85, pages 139-147) proposed an improved restraint for anisotropic Iosipescu specimens. In summary, this clamping on two corresponding terminal blocks and two control blocks, which are connected to each other via linear guides, that in a clamped in each case with one end in the terminal blocks test body at a shear stress no bending stresses are induced. In addition, the device reduces the risk of misalignment of the specimen during test specimen installation at the start of the experiment. However, a disadvantage remains the rotation of the terminal blocks with respect to the Prüfkraftrichtung, since the points of application of the open load line of the testing machine are pivotally connected to the terminal blocks and kinematically thus only a transverse movement of the terminal blocks relative to each other is possible. Furthermore, the positive load introduction on the limited

End faces of the longitudinal edges of the specimen due to high Surface pressure the absolutely loadable test force.

Another test method standardized in ASTM D7078 is called the V-Notched Rail Shear Shear Test. This is a combination of the advantages of the two-rail shear test according to ASTM D4255 and the Iosipescu shear test according to ASTM D5379. The advantages mainly relate to the increased distance between the baseline of the V-notches. As a result, a much larger area is available for the application of strain gauges.

Compared to the two-rail shear test was the

Test specimen holder improved, there are no holes in the specimen required because the specimen by means of

Clamping screws is clamped. The tension by means of

However, clamping screws has considerable disadvantages in terms of reproducibility due to the clamping forces set differently for each experiment

Test results. A compensation of the transverse strain to

Prevention of induction of normal stresses is also not provided, so that here too falsified material parameters are to be expected, as well as parasitic

Storage moments and lateral forces in the load line.

The invention is therefore based on the object, a

To provide a device for mechanical material testing, which improves the material testing of fiber-reinforced plastics in such a way that reproducible

Test conditions can be achieved

Tension-free test specimen installation at the beginning of the test

is made possible and a free transverse strain of the specimen is ensured so that transverse elongation induced

Normal stresses in the test cross section are eliminated.

The object underlying the invention is achieved by a device for mechanical material testing with the

Characteristics of independent claim 1 solved. In the dependent claims are advantageous

Embodiments and developments described.

It is a shear test device for mechanical

Material testing, in particular for the determination of

Thrust characteristics of materials proposed. This comprises two clamping blocks for clamping one end of a loaded with a test load in the test force test specimen. The two clamping blocks are connected to each other so that they are relative to each other, parallel and transverse to

Test force direction in a plane, are movable. Each of the two terminal blocks is connectable to a respective force application point of a testing machine, wherein on at least one terminal block, a guide means is arranged, which is connected to one of the points of application of force so that

at least one terminal block relative to this

Force application point is movable transversely to the Prüfkraftrichtung.

When applying a test force in the test force direction, the test specimen can therefore stretch freely transversely to the test force direction, without this transverse elongation induced

Normal stresses in the test cross-section arise.

According to the invention it can be provided that the at least one terminal block and the guide means an integral

Form unity.

It is expedient, furthermore, that two control blocks

are provided and the terminal blocks are connected via at least one first aligned parallel to the Prüfkraftrichtung linear guide with one of the two control blocks and at least a second aligned transversely to the Prüfkraftrichtung linear guide with the respective other of the two control blocks.

The linear guides transverse and parallel to the Prüflastrichtung form together with the clamping blocks and the control blocks a functional unit, whereby a clamping block is movable relative to the other terminal block in a plane transverse and parallel to the Prüflastrichtung. As a result, a relative rotation of the first terminal block and the second

Clamping block is excluded around each axis of space, both a bending and torsion of lying in this plane specimen is prevented, however, allows a transverse strain of the specimen transverse to the Prüflastrichtung. According to the invention, this improvement in the straightness of the test piece also leads to an increase in the valid

Shear tests.

It is particularly advantageous if a first linear guide and / or a second linear guide are designed in pairs.

In one embodiment, the guide means comprises a first guide means part which is rigidly connectable to the clamping block, and a second guide middle part, which is rigidly connectable to the force application point, wherein the first

Guide means part is connected to the second guide means part via a third linear guide. If the axes of the second linear guide and the third linear guide are parallel, the result according to the invention is the advantage that only a relative movement of the first

Guide means part to the second guide means part transverse to the Prüfkraftrichtung is possible, all other translational and rotational degrees of freedom are blocked due to the rigid connections to the terminal block and the point of force application.

To further minimize transverse strain induced

Normal stresses in the test cross-section of the test specimen, which despite the lack of expansion due to friction

can occur, it is expedient the first linear guide, the second linear guide and / or the third linear guide as linear roller guide, roller guide,

Form parallel spring guide or linear sliding guide. According to the invention, the test body force and / or

positively with one of its ends in the

Clamping blocks are clamped.

For the formation of the frictional clamping of the ends of the specimen, it is appropriate that the

Terminal blocks each have a set of clamping jaws, consisting of a fixed first clamping jaw, which acts as a reproducible stop, and a complementary cantilevered second clamping jaw and one with the second jaw operatively connected

Have Spannkraftaktuator. It is particularly advantageous here to use hydraulic cylinders as Spannkraftaktuatoren, and operate them so that they act on the respective associated jaw set with a same clamping pressure, so that the test piece is clamped to the broad sides of the Prüfkörperenden with the same clamping force and the test force as a thrust can be introduced via the clamping jaw sets. For tests at room temperature extremely reduced or elevated temperatures, it may be necessary to use purely mechanically acting clamping force actuators, which, for example, as clamping screws

can be executed, these by means of a

be tightened defined tightening torque. According to the invention, the clamping jaws in a further embodiment can also be designed such that they are suitable both for non-positive and for form-locking clamping of the test specimen. This is particularly advantageous if no flat but for example cylindrical

Test specimens should be tested. By the light

Removability of the jaw sets from the terminal blocks is given a high flexibility of the shear test device.

Due to the measurable and uniform hydraulic

Pressurization of the clamping jaws as well as the fixed first clamping jaw ensures a reliable and reproducible Prüfkörpereinspannung. Too high pressure forces can be avoided. Due to the simple design, the Prüfkörperwechselzeiten can be reduced. Since the overhung jaws of the jaw sets are designed to be removable, both inspections and cleaning are much easier.

For form-fitting clamping, the terminal blocks

Have locking means, so that the test force in the sample body on the front side of the longitudinal edges of the

Test body can be introduced.

The combination of positive and positive clamping is equally suitable for quasi-static and cyclic tests, with both tensile and pressure test loads being suitable. In addition to a tensile or compressive load can also Zug-Druck-Wechselprüfungen be performed.

Preferably, the shear test device is designed such that in the plane of Prüfkraftlängs- and transverse direction of an antisymmetric arrangement of the modules

Shear test device in relation to the critical

Test cross-section of the test specimen is present. This serves to avoid bending moment in the critical

Test specimen cross section.

Furthermore, it is expedient that the shear test device is designed such that the test body during the

Shear test in the area of its test cross-section on all sides accessible, whereby various strain gage systems, such as strain gauges, tactile and / or optical and / or camera-based extensometers, can be used.

The idea of the invention resides in that test specimens

different geometry can be used. For larger or smaller specimens, the

Shear test device scaled executed.

Typically, and in accordance with ASTM D7078, specimen dimensions are within limits

Test piece width of up to 56 mm, for the test piece length of up to 145 mm and for the test piece thickness of up to 10 mm. The test specimen thickness can be optional

Include suitable liners to protect the specimen surface. The test cross-section of a specimen of the typical dimensions notched on both sides of a longitudinal extension lies in a range of 5 mm by 31 mm. The clamping blocks are preferably designed so that

Tests are possible at room temperature reduced or elevated temperatures. This applies both to be used for the terminal blocks, control blocks, hydraulic cylinders and linear guides material and the accessibility of the Prüfquerschnitts for corresponding heating or cooling devices ^¬. The material must be chosen so that a temperature-induced deformation of the shear test device is negligible compared to the deformation of the test specimen by the load with the test load. There are heating devices providable, which thermal radiation, for example in the form of a

Lamp furnace, or use thermal convection. For

Magnetic test specimens are suitable for induction-based heating devices.

The invention is based on a Embodiment and accompanying drawings explained in more detail. Show

1 is a schematic diagram of the shear test device according to the invention for mechanical material testing,

FIG. 2 is a three-dimensional representation of the preferred embodiment of the shear test device according to the invention for mechanical material testing, FIG.

Fig. 3 is a three-dimensional sectional view of the preferred embodiment of the invention

Shear test device for mechanical material testing. The inventive shear test device 1 for mechanical material testing for determining the thrust characteristics of

Materials, in particular of intralaminar shear characteristics of fiber reinforced plastics, shear stress according to the currently applicable standards is usually non-positive and / or positive fit with an upper force application point 8 and a lower force application point 8 of an open

Load strings of a testing machine, not shown

connected and used. In order to generate a test force 7, the upper force application point 8 is moved rectilinearly relative to the lower force application point 8

Test force direction 71 moves.

1, the basic structure and operation of the shear test device 1 will first be shown. The shear test device 1 consists essentially of an upper and a lower L-shaped clamping block 2, for clamping a flat test piece 9, an upper and a lower control block 3 and a guide means 10. On the broad sides of each end of the test piece 9, ie those surfaces in Thickness direction of the test piece 9, may optionally be provided to protect the surface from damage when tensioning glue. The test cross-section 91 is formed by the smallest

Cross section of the test piece 9 notched on both sides of the longitudinal extent.

Via a first linear guide 4 is in each case the upper

Terminal block 2 connected to the lower control block 3 and the lower terminal block 2 to the upper control block 3, so that the upper terminal block 2 can move relative to the lower control block 3 and the lower terminal block 2 to the upper control block 3 parallel to the Prüfkraftrichtung 71. In this case, the first linear guides 4 are paired in the respective terminal block 2, so that a rotation of the respective terminal block 2 to the respective control block 3 about an axis parallel to the Prüfkraftrichtung 71 prevents and a

unstable twisting of the shear test device is kinematically blocked. Via a second linear guide 5 is in each case the upper

Control block 3 connected to the upper terminal block 2 and the lower control block 3 to the lower terminal block 2, so that the upper control block 3 relative to the upper

Clamp block 2 and the lower control block 3 relative to the lower terminal block 2 can move transversely to the Prüfkraftrichtung 71.

The guide means 10 comprises a first guide middle part 101 and a second guide middle part 102, these being connected via a third linear guide 6. The first

Guide center portion 101 is rigid, i. without one

rotational and translational degree of freedom, via a two-part lower connecting element 11 to the lower terminal block 2 releasably connected. The second guide middle part 102 is rigidly and detachably connected to the lower force application point 8. The third linear guide 6 is parallel to the second linear guide 5, that is arranged transversely to the Prüfkraftrichtung 71. The guide means 10 is designed such that it can transmit the test force 7 in the test force direction 71, the first guide middle part 101 remaining movable relative to the second guide middle part 102 transversely to the test force direction 71. All other degrees of freedom are blocked by the rigid connections to the lower terminal block 2 and the lower force application point 8. Furthermore, it is ensured by an unillustrated stop that the relative movement of the first guide means part 101 to the second guide middle part 102 can be limited transversely to the Prüfkraftrichtung 71.

The upper terminal block 2 is rigidly and detachably connected via an upper connecting element 11 with the upper force application point 8.

In the lower terminal block 2 and the upper terminal block 2 is transverse to the Prüfkraftrichtung 71 in each case an opening

intended. The openings serve in each case for receiving a first clamping device 12 and a

Arretierungsmittels 13 for the test specimen 9th

Hereinafter, only the tensioning device 12 and the

Arretierungsmittel 13 of the lower terminal block. 2

described. For the upper terminal block 2, however, applies

The same. While the tensioning device 12 for

non-positive clamping of the test specimen 9 on its

Broad sides is used, the locking means 13 to

positive clamping of the test specimen 9 over its in Prüfkraftrichtung 71 facing end faces of his

Longitudinal flanks suitable. The first tensioning device 12 and the second locking means 13 can be used independently of each other.

The tensioning device 12 is designed as follows. As is apparent from Fig. 3, is at the rear

Inner edge of the opening of the lower terminal block 2, a hydraulic cylinder 121 is arranged. In contrast to the

Hydraulic cylinder 121 is disposed on the front inner edge of the opening a fixed first clamping jaw 122, which has a flat clamping surface on its broad sides

formed. This first clamping jaw 122 is assigned a cantilevered second clamping jaw 123, which is arranged on the piston of the hydraulic cylinder 121.

The hydraulic cylinder 121 and the corresponding

Hydraulic cylinder 121 of the upper clamping block 2 are each acted upon by the same pressure of a hydraulic supply, not shown, so that the test piece 9 is stretched at the broad sides of both its ends with the same force.

The locking means 13 is formed as follows. As can be seen from Fig. 3, is a, as a wedge pairing

trained, locking 13 arranged in the opening of the lower terminal block 2. The first wedge 131 of the wedge pairing is in this case at the lower inner edge of the

Breakthrough arranged and by means of an adjusting element 133 opposite the second wedge 132 transversely to

Test force direction 71 can be positioned. The second wedge 132 of the wedge pairing is displaceable in the test force direction 71

stored. The thickness of the second wedge 132 of the wedge pairing is greater than the thickness of the test piece 9. By positioning the first wedge 131 of the wedge pairing away from the test cross section 91 of the test piece 9, the

Test specimen 9 over the end faces of its longitudinal edges parallel to the Prüfkraftrichtung 71 clamped form fit.

From the described construction of the shear test device 1, the following basic relationships result for the performance of a shear test. The lower force application point 8 is located at an immovable end of the testing machine, not shown. Arranged thereon are the guide means 10 and the first part of the two-part and separate in this embodiment, the lower connecting element 11. The upper

Force application point 8 is located at an in

Test force direction 71 linearly movable end of the testing machine, not shown. It is rigidly arranged and connected via the upper connecting element 11, the operatively connected upper terminal block 2 and the lower terminal block 2. The front side at the lower terminal block 2, in

Pointing towards the lower force application point 8 is the second part of the two-part and separate first

Connecting element 11 is arranged.

For mounting the test piece 9 before performing a shear test of the lower terminal block 2 is transverse to

Test force direction 71 moves, so that the distance between the lower terminal block 2 to the upper terminal block 2 increases.

The test piece 9 is first stretched at one end with the clamping device 12 and / or the locking means 13 in the upper terminal block 2. Subsequently, the distance of the lower terminal block 2 can be reduced to the upper terminal block 2, so that the still free end of the

Test specimen 9 passes into the effective range of the clamping device 12 and the locking means 13 of the lower terminal block 2, by means of which the test body 9 can be clamped non-positively and / or positively. To close the

Force flow of the testing machine, not shown, the first part and the second part of the lower

Connecting element 11 by positioning the upper

Kraftangriffspunktes 8 toward the lower force application point 8 merged and the connection of the lower

Connecting element 11 positive and positive

closed . By applying the test force 7 along the

Test force direction 71, the test specimen 9 in his

Test cross section 91 loaded. The necessary relative movement of the upper terminal block 2 to the lower terminal block 2 is parallel to the Prüfkraftrichtung 71st

aligned first linear guide 4 allows. to

Prevention of induction of transverse strain

Normal stresses in the test section 91 is the lower

Terminal block 2 to the upper terminal block 2 through the transverse to

Prüfkraftrichtung 71 aligned second linear guides 5 and the third linear guide 6 transversely to the Prüfkraftrichtung 71 freely movable. Both the parallel and transversely to the Prüfkraftrichtung aligned linear guides 4, 5, 6 are as a particularly low-friction Linearwälzführung

executed.

After completion of the shear test, the disassembly of the specimen 9 is reversed to the described order of assembly of the specimen 9. It is envisaged that the first linear guide 4 is locked in the upper control block 3, so that a relative movement of the lower terminal block 2 to the upper control block 3 is not possible. Thus, the assembly of the specimen 9 can be made without constraint for the next shear test.

LIST OF REFERENCE NUMBERS

1 shear test device

2 terminal block

3 control block

4 first linear guide (parallel to the test force direction)

5 second linear guide (transverse to the test force direction)

6 third linear guide (transverse to the test force direction)

7 test force

71 test force direction

8 force application point

9 specimens

91 test cross section

10 guiding means

101 first guide middle part

102 second guide middle part

11 connection element

12 clamping device

121 hydraulic cylinders

122 first clamping jaw

123 second clamping jaw

13 locking means

131 first wedge

132 second wedge

133 adjusting element

Claims

claims

Shear test device (1) for mechanical

Material testing, in particular for the determination of

Thrust characteristics of materials, including two

Clamping blocks (2) for clamping one end each of a test force (7) in the test force direction (71)

loaded test specimen (9), with the two clamping blocks

(2) are connected to each other so that they are relative to each other, parallel and transversely to the Prüfkraftrichtung (71) in a plane movable, and wherein each of the two clamping blocks (2), each with a

Force application point (8) of a testing machine is connectable, characterized in that at

at least one clamping block (2) a guide means (10) is arranged, which is connected to one of the force application points (8) so that the at least one

Clamping block (2) relative to this force application point (8) transversely to the Prüfkraftrichtung (71) is movable.

Shear test device (1) according to claim 1, characterized in that furthermore two control blocks

(3) are provided and the terminal blocks (2) via at least one first, parallel to

Test force direction (71) aligned linear guide (4), each with one of the two control blocks (3) and via at least one second, transverse to

Test force direction (71) aligned linear guide (5) with the other of the two control blocks (3) are connected.

3. shear test device (1) according to claim 2, characterized in that at least a first

Linear guide (4) and / or at least a second

Linear guide (5) is formed in pairs.

4. shear test device (1) according to one of claims 1 to

3, characterized in that the

Guide means (10) comprises a first guide means part (101) which is rigidly connected to the clamping block (2) comprises a second guide means part (102) which is rigidly connected to the force application point (8) and the first guide means part (101) with the second guide means part (102) via a third linear guide (6) is connected.

5. shear test device (1) according to one of claims 1 to

4, characterized in that the first linear guide (4) and / or the second linear guide (5) and / or the third linear guide (6) as

Linear roller guide, roller guide,

Linear sliding guide or parallel spring guide

are formed.

6. shear test device (1) according to one of claims 1 to

5, characterized in that the

Clamping blocks (2) each have a clamping jaw set,

consisting of a fixedly arranged first clamping jaw (122) and a complementary cantilevered second clamping jaw (123), as well as one with the second clamping jaw (123) in operative connection

Have Spannkraftaktuator.

7. shear test device (1) according to claim 6, characterized

characterized in that the Spannkraftaktuator is designed as a hydraulic cylinder (121).

8. shear test device (1) according to one of claims 1 to 7, characterized in that the Terminal blocks (2) locking means (13) which introduce the test force (7) on the end faces of the longitudinal edges of the test body (9) in the test body (9).

9. shear test device (1) according to one of claims 1 to 8, characterized in that the

Shear test device (1) is designed such that the test body (9) during the shear test in the region of the test cross section (91) of the test body (9)

is accessible.

10. shear test device (1) according to one of claims 1 to 9, characterized in that it is constructed with respect to the test cross-section (91) of the test body (9) antisymmetric.