CN103487324A - Composite soil body compression-shearing fracture failure test method and test device - Google Patents
Composite soil body compression-shearing fracture failure test method and test device Download PDFInfo
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- CN103487324A CN103487324A CN201310430894.3A CN201310430894A CN103487324A CN 103487324 A CN103487324 A CN 103487324A CN 201310430894 A CN201310430894 A CN 201310430894A CN 103487324 A CN103487324 A CN 103487324A
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Abstract
The invention discloses a composite soil body compression-shearing fracture failure test method and test device. The method comprises the steps as follows: 1, preparing a sample to be tested, wherein the top surface and the bottom surface of the cubic soil block are perpendicular to the horizontal plane; 2, forming a gap in one side surface of the sample to be tested; 3, placing a first loading plate and a second loading plate at the upper part and the lower part of the sample to be tested; 4, simultaneously applying acting forces which point to the direction of the sample to be tested and are perpendicular to the horizontal plane to the first loading plate and the second loading plate. The test device provided by the invention comprises the first loading plate and the second loading plate which are the same in shape and are respectively positioned at the upper part and the lower part of the sample to be tested.
Description
Technical field
The present invention relates to soil mass fragmentation experimental technique field, specifically a kind of soil mass fragmentation failure test method and test unit, relate in particular to test method and test unit that a kind of soil body Compression and cutting Mixed Mode Fracture destroys.
Background technology
Fracture is due to new crack initiation or a kind of destructive process of having existed the expansion in crack to cause, is one of material and structural damage failure mode.In four more than ten years in the past, the development of fragility and accurate hard brittle material fracturing mechanics mainly concentrates in concrete, simultaneously, has also established its proper status in Geotechnical Engineering.The application of fracturing mechanics shows, fracturing mechanics can provide investigation and solve the strong instrument of many application problems in rock-soil mechanics and Geotechnical Engineering.
Crack in the soil body is a kind of spontaneous phenomenon, in many natural and artificial earth structures, often runs into.Many earth structures are (as the soil property core-wall of earth and rockfill dam, the clay bottom of refuse landfill and cap rock etc.) in, the crack of soils problem is the key issue that is related to the engineering success or failure, therefore the crack of soils problem also becomes the study hotspot problem of academia and engineering circles, is also the difficulties of current research simultaneously.
Most scholars think, in the soil body, the generation in crack and expansion are that stress state due to crack location reaches critical value and causes, this stress can be perpendicular to the tension of fracture plane, can be also the shear stress that is parallel to fracture plane, crack produces and the mechanism of expansion can make an explanation from the angle of fracturing mechanics.Belong to discontinuous medium containing the crack soil body, it destroys description and criterion should be set up based on discontinuous medium.In fracturing mechanics, crack propagation can be divided into three basic forms of it by its stress, that is: opening mode (or tension type), sliding mode (or shearing-type) and tearing mode (or torque-shear type).In soil mass fragmentation destroys, mainly consider two kinds of tension type and shearing-types.
The fracture proterties of the experimental study soil body is the main research of soil mass fragmentation mechanics always.At present, for the main experimental method of studying soil body I type rupture failure proterties, be that three-point bending fracture test and compact tension specimen are tested, and to the modified test method of these two kinds of methods; The test method of research soil body II-type fracture damage proterties is mainly asymmetric four-point bending test; There is not yet the report of relevant research soil body III type rupture failure proterties test method.
Self-characteristic due to the soil body, in being applied to actual earth structure, soil mass fragmentation be not often by single drawing, compressive stress or pure shear stress causes, but the pressure caused by the acting in conjunction of compressive stress and shear stress under complicated stress state is cut Mixed Mode Fracture and is destroyed; Or drawing of being caused by the acting in conjunction of tension and shear stress cut Mixed Mode Fracture and destroyed.The present invention only relates to pressure and cuts the research that Mixed Mode Fracture destroys.
Cut the experimental study method of STRESS VARIATION under state and cracking state in pressure for the soil body, its principle is to put on the pressure shear stress of soil body sample, can be decomposed into shear stress and the compressive stress (see figure 1) that is parallel to gravity direction perpendicular to gravity direction, utilize resulting pressure shear stress to be combined certain rule with the relation of soil sample strain and limit stress, just can study the soil body and press the rupture failure problem under the shear stress state in difference.According to above principle, in test operation, can utilize shear stress and compressive stress to form sample is had to making a concerted effort of different action directions the different active positions of sample and combinations of values, press to cut and make a concerted effort.
Yet, for obtaining acting on arbitrarily the relation of angular range internal stress and sample STRESS VARIATION and cracking state, above method must need to carry out the huge test of quantity in operating process, coordinate by compressive stress and shear stress are carried out to careful adjustment, obtain required numerical value and cut and make a concerted effort with the pressure of effect angle.Simultaneously, even so, the pressure that still is difficult to obtain to have better continuous distribution characteristic in practical operation is cut with joint efforts and soil sample strain and limit stress relation.
In view of by apply respectively compressive stress and shear stress simultaneously, indirectly to obtain pressing, cut the deficiency that the test method of making a concerted effort exists, designing the pressure shear stress that the new soil body presses shear fracture test method and device directly to obtain acting on soil sample has very positive meaning.
Summary of the invention
One of purpose of the invention has been to provide the test method that a kind of soil body presses shear fracture to destroy.
For realizing that the technical scheme that the invention purpose adopts is such, the soil body is pressed and is cut composite rupture failure test method, comprises the following steps:
1) prepare tested sample, described tested sample is the cube soil block, comprises end face, bottom surface and four sides; The end face of described cube soil block is vertical with surface level with bottom surface;
2) in gap of one of them side opening of tested sample, described tested sample is one-sided cracks;
3) place the first load plate and the second load plate at the upper and lower of described tested sample; Described the first load plate and the second load plate are the L-type plate, or the inboard of described the first load plate and the second load plate has the L-type breach; Make two adjacent sides of described tested sample and the interior side contacts of the first load plate, and the interior side contacts of two sides that do not contact with described the first load plate and the second load plate;
4) the first load plate and the second load plate are applied simultaneously and point to the tested sample direction and perpendicular to the acting force of surface level.As preferably, the direction of loading is vertical with gravity direction.
Another purpose of the invention has been to provide the test unit that a kind of soil body presses shear fracture to destroy.
The technical scheme adopted for achieving the above object is such, and the soil body is pressed and cut composite rupture failure test device, comprises the first load plate and the second load plate that shape is identical, and described the first load plate and the second load plate lay respectively at the tested sample both sides.Described tested sample is a cube soil block with end face, bottom surface, the first side, the second side, the 3rd side and the 4th side, and described end face is vertical with surface level with bottom surface.
Described the first load plate has two orthogonal towards a side of tested sample, i.e. α face and β face.During test, the 3rd contacts side surfaces of described α face and tested sample, the second contacts side surfaces of described β face and tested sample.
Described the second load plate has two orthogonal towards a side of tested sample, i.e. γ face and δ face.During test, the first contacts side surfaces of described γ face and tested sample, the 4th contacts side surfaces of described δ face and tested sample.
Technique effect of the present invention is mathematical, puts on the acting force of soil body sample, can be decomposed into shearing and pressure, can simulate truly the process of the soil body rupture failure under pressure shear stress compound action that has crack.Further, by changing direction, the size of described acting force, make corresponding record simultaneously, just can easily obtain acting on arbitrarily the relation of angular range internal stress and sample STRESS VARIATION and cracking state.The operating process of the method disclosed in the present and device thereof is simple, accurate, avoided needing in the prior art to carry out the huge test of quantity, and by being carried out to careful adjustment, pressure and shearing coordinate, just can obtain the disadvantage of results needed (simulation process or numerical analysis), the pressure that further can also obtain having better continuous distribution characteristic is cut with joint efforts and soil sample strain and limit stress relation.
The accompanying drawing explanation
The indefiniteness embodiment that the device of the invention can provide by accompanying drawing further illustrates.
Fig. 1 soil body presses shear fracture to destroy principle;
Fig. 2 soil body is pressed shear fracture failure test method;
Fig. 3 soil body shear fracture failure test system stereographic map;
The stereographic map that Fig. 4 is another visual angle of pilot system in Fig. 3;
Fig. 5 soil body shear fracture failure test system architecture splits schematic diagram;
0 ° of loading schematic diagram of Fig. 6 soil body shear fracture failure test;
30 ° of loading schematic diagram of Fig. 7 soil body shear fracture failure test;
60 ° of loading schematic diagram of Fig. 8 soil body shear fracture failure test.
In figure: 1-the first loading pin, 2-the first drill steel, 3-crack, 4-the first load plate through hole, 5-the first load plate, 6-tested sample, 7-load sensor, 8-displacement transducer, 9-the second load plate, 10-the second loading pin, 11-the second load plate through hole, 12-the second drill steel.
Embodiment
Below in conjunction with embodiment, the invention is described further, but should not be construed the above-mentioned subject area of the invention, only limits to following embodiment.Without departing from the technical idea of the present inventions, according to ordinary skill knowledge and customary means, make various replacements and change, all should be included in the protection domain of the invention.
Embodiment 1:
The soil body is pressed and is cut composite rupture failure test method, comprises the following steps:
1) prepare tested sample, described tested sample is the cube soil block, comprises end face, bottom surface and four sides; During placement, make the end face of described cube soil block vertical with surface level, the bottom surface of described cube soil block is also vertical with surface level; In test, revolving cube soil block arbitrarily, but need the described end face of maintainance block and the bottom surface state vertical with surface level.
2) in gap of one of them side opening of tested sample, described tested sample is one-sided cracks.The method of cracking can adopt this area to prepare soil sample method commonly used, as with blade incision etc.
3) place the first load plate and the second load plate in the both sides of described tested sample.
The present embodiment has two schemes, the first: described the first load plate and the second load plate are the L-type plate, (or) it two is: the inboard of described the first load plate and the second load plate has the L-type breach.But no matter adopt that a kind of scheme, make two adjacent sides of described tested sample and the interior side contacts of the first load plate, and the interior side contacts of two sides that do not contact with described the first load plate and the second load plate.
4) the first load plate and the second load plate are applied to the acting force that points to the tested sample direction simultaneously.
Referring to Fig. 1 or Fig. 2, a shown in figure partly is the rear view of the cube soil block made according to testing requirements in advance.Be out the gap in cube soil block one side in figure shown in b.The existence in this gap, simulated crack existing in actual ground.Referring to Fig. 1, A, B are load(ing) point equally; C, D are the strong point; T is the shear load that puts on sample; N is the pressure load that puts on sample.This process simulation both apertured Rock And Soil at shear load with press the variation occurred under the load acting in conjunction.In embodiment, need to record the size of each load, and the displacement of load plate.
Further, step 2) in, described gap (being the b part) opens the first ，Gai gap, side in tested sample perpendicular to described the first side, end face and bottom surface, and described gap is divided into by the first side of tested sample two parts that area is equal.As shown in Figure 2, described gap is end face and the bottom surface that tested soil sample is run through in the ，Gai crack, crack in the soil body in simulating reality.
As preferably, in the step 3) of the present embodiment, the cross section of the inboard breach of the first load plate and the second load plate is L-type, and in described L-type, it is long that the length on long limit equals the rib of tested sample, and the length of minor face equals half that the rib of tested sample is grown.The 3rd side that is sample contacts fully with the first load plate, and the second side of sample (adjacent with the 3rd side) only has the area of half to contact with the first load plate; The 4th side of same sample contacts fully with the first load plate, and the first side of sample (adjacent with the 4th side) only has the area of half to contact with the first load plate.
In the step 4) of embodiment, the acting force that the first load plate and the second load plate are applied simultaneously is respectively F
1and F
2; Described F
1and F
2equal and opposite in direction, opposite direction, and on the same straight line.
As preferably, adjust the position of tested sample, the first load plate and the second load plate, make F
1direction identical with gravity direction.
Embodiment 2:
The present embodiment provides a kind of device, can realize the described method of embodiment 1.
The soil body is pressed and is cut composite rupture failure test device, comprises the first load plate 5 and the second load plate 9 that shape is identical, and described the first load plate 5 and the second load plate 9 lay respectively at the upper and lower of tested sample.Described tested sample is a cube soil block with end face, bottom surface, the first side, the second side, the 3rd side and the 4th side, and described end face is vertical with surface level with bottom surface.In the present embodiment, the upper end of described the first load plate 5 can be connected on mechanical loading unit, and the lower end of described the second load plate 9 can be connected on mechanical loading unit equally.
Referring to Fig. 3, in figure, tested sample is marked as numbering 6, and the both sides of the 3rd side of tested sample 6 are adjacent with the first side with the second side respectively, and the 4th side of tested sample is relative with the 3rd side.Have a crack 3 of running through described end face and bottom surface in the first side of tested sample 6.Described crack 3 and end face, bottom surface, the first side are all vertical, with the 3rd side and the 4th parallel sided.
Described the first load plate 5 and the second load plate 9 are all to have certain thickness rigid plate.As preferably, it is long that described the first load plate 5 and the second load plate 9 thickness in the horizontal direction are more than or equal to the rib of tested sample.
Described the first load plate 5 has two orthogonal towards a side of tested sample, i.e. α face and β face, and the mode of its formation is to cut out a right-angle notch in the first load plate 5 towards a side of tested sample.Because a face of the first load plate 5 is cut one jiao, two orthogonal that therefore has more is exactly α face and β face.Described α face and β face all can rotate with the rotation of the first load plate 5, make it have certain angle of inclination.During test, the 3rd contacts side surfaces of described α face and tested sample, the second contacts side surfaces of described β face and tested sample.Because described the second load plate 9 is positioned at the below of tested sample, therefore, described tested sample is shelved on the second load plate 9, i.e. the weight of described the second load plate 9 carrying tested sample.
Described the second load plate 9 has two orthogonal towards a side of tested sample, i.e. γ face and δ face, and the mode of its formation is to cut out a right-angle notch in the second load plate 9 towards a side of tested sample.Because a face of the second load plate 9 is cut out one jiao, two orthogonal that therefore has more is exactly γ face and δ face.Described γ face and δ face all can rotate with the rotation of the first load plate 5, make it have certain angle of inclination.During test, the first contacts side surfaces of described γ face and tested sample, the 4th contacts side surfaces of described δ face and tested sample.
In embodiment, the upper end of described the first load plate 5 is connected with charger, and the lower end of the second load plate 9 is connected with charger equally.The 4th side of tested sample is shelved on the δ face.
In the present embodiment, the first side of described tested sample has a gap perpendicular to tested sample end face and bottom surface, and described gap is divided into by the first side of tested sample two parts that area is equal.To equal the rib of tested sample long being parallel to width on sample end face (or perhaps bottom surface) direction for described α face and δ face, and described β face and γ face equal long half of the rib of tested sample being parallel to width on tested sample end face (or perhaps bottom surface) direction.So just make the 3rd side of tested sample contact with the α face fully, the first half of the second side of tested sample contacts with the β face.Equally, the 4th side of tested sample contacts with the δ face fully, and the Lower Half of the first side of tested sample contacts with the γ face, and preferably, the upper limb of γ face overlaps with described crack 3.
During test, by the first load plate 5 and the second load plate 9, to tested sample, applying acting force.Contact because the first load plate 5 is L-type with the second load plate 9 with tested sample, make the power that finally acts on tested sample be decomposed into the power of four direction, simulated the soil body simultaneously pressurized, cut the phenomenon of effect.Preferably, rotation tested sample, the first load plate 5 and the second load plate 9, make the direction of described acting force and gravity on same straight line.
Further, also comprise that the first loading pin 1 and the second loading pin 10(belong to respectively the Mechanical loading system of the first load plate 5 tops and the second load plate 9 belows).The upper surface of described the first load plate 5 has some the first load plate through holes 4, and the axis of described the first load plate through hole 4 is parallel to the intersection of α face and β face.The upper surface of described the second load plate 9 has some the second load plate through holes 11, and the axis of described the second load plate through hole 11 is parallel to the intersection of γ face and δ face.The front end of described the first loading pin 1 has the first drill steel 2.The front end of described the second loading pin 10 has the second drill steel 12.During test, described the first drill steel 2 inserts in the first load plate through hole 4 of the first load plate 5 upper surfaces, and described the second drill steel 12 inserts in the second load plate through hole 11 of the second load plate 9 upper surfaces.By acting on the power of the first loading pin 1 and the second loading pin 10, to tested sample, apply acting force.
In embodiment, also comprise the displacement transducer 8 of measuring the first load plate 5 and the second load plate 9 displacements, and measure the load sensor 7 that is applied to amount of force on the first load plate 5 and the second load plate 9.In the effect of simulation earth stress, accurately record test figure.
Embodiment 3:
The present embodiment provides a kind of device, shown in complete same Fig. 3 of shape and structure, 4 and 5, can more preferably realize the described method of embodiment 1.
The soil body is pressed and is cut composite rupture failure test device, comprises the first load plate 5 and the second load plate 9 that shape is identical, and described the first load plate 5 is positioned at the tested sample top, and the second load plate 9 is positioned at the tested sample below.Described tested sample is a cube soil block with end face, bottom surface, the second side, the first side, the 3rd side and the 4th side (with embodiment 2 prepared sample).
Described the first load plate 5 and the second load plate 9 are all to have certain thickness rigid plate.As preferably, it is long that described the first load plate 5 and the second load plate 9 thickness in the horizontal direction are more than or equal to the rib of tested sample.In the present embodiment, shown in the upper end side of the first load plate 5 and the second load plate 9 be all that circular arc (from front view), the lower end of 90 ° is L-type breach (equally from front view).Being described the first load plate 5 has two orthogonal towards a side of tested sample, i.e. α face and β face, and the mode of its formation is to cut out a right-angle notch in the first load plate 5 towards a side of tested sample.Because a face of the first load plate 5 is cut out one jiao, two orthogonal that therefore has more is exactly α face and β face.Described α face and β face all can rotate with the rotation of the first load plate 5, make it have certain angle of inclination.During test, the 3rd contacts side surfaces of described α face and tested sample, the second contacts side surfaces of described β face and tested sample.
Described the second load plate 9 has two orthogonal towards a side of tested sample, i.e. γ face and δ face, and the mode of its formation is to cut out a right-angle notch in the second load plate 9 towards a side of tested sample.Because a face of the second load plate 9 is cut out one jiao, two orthogonal that therefore has more is exactly γ face and δ face.Described γ face and δ face all can rotate with the rotation of the first load plate 5, make it have certain angle of inclination.During test, the first contacts side surfaces of described γ face and tested sample, the 4th contacts side surfaces of described δ face and tested sample.
In the present embodiment, the first side of described tested sample has a gap perpendicular to tested sample end face and bottom surface, and described gap is divided into by the first side of tested sample upper and lower two parts that area equates.To equal the rib of tested sample long being parallel to width on tested sample end face (bottom surface) direction for described α face and δ face, and described β face and γ face equal long half of the rib of tested sample being parallel to width on tested sample end face (bottom surface) direction.So just make the 3rd side of tested sample contact with the α face fully, half of the second side of tested sample contacts with the β face.Equally, the 4th side of tested sample contacts with the δ face fully, and half of the first side of tested sample contacts with the γ face, and the border of γ face overlaps with described crack 3.
In the present embodiment, shown in the upper surface of the first load plate 5 have two and ranked first load plate through hole 4, the axis of described the first load plate through hole 4 is parallel to the intersection of α face and β face.Several of each row the first load plate through hole 4 is distributed on same circumference, and described circumference is concentric with the outer arc of the first load plate 5.The upper surface of described the second load plate 9 has equally two and ranked second load plate through hole 11, and the axis of described the second load plate through hole 11 is parallel to the intersection of γ face and δ face.Several of each row the second load plate through hole 11 is distributed on same circumference, and described circumference is concentric with the outer arc of the second load plate 9.
In the present embodiment, also comprise the first loading pin 1 and second loading pin 10 of rod shape.The head end of described the first loading pin 1 is equipped with the first drill steel 2 of two sticks shape, and described the first drill steel 2 is mutually vertical with the first loading pin 1, makes the first loading pin 1 integral body that the first drill steel 2 is installed be the F type.
The head end of described the second loading pin 10 is equipped with the second drill steel 12 of two sticks shape, and described the second drill steel 12 is mutually vertical with the second loading pin 10, makes the second loading pin 10 integral body that the second drill steel 12 is installed be the F type.
The diameter of above-mentioned the first drill steel 2 all is less than or equal to the aperture of the first load plate through hole 4; The diameter of the second drill steel 12 all is less than or equal to the aperture of the second load plate through hole 11.During test, because the first load plate through hole 4 and the second load plate through hole 11 all have several, described two the first drill steels 2 can insert in any two first load plate through holes 4 of the first load plate 5 upper surfaces.Described two the second drill steels 12 can insert in any two second load plate through holes 11 of the second load plate 9 upper surfaces.Apply acting force by the tail end to the first loading pin 1 and the second loading pin 10, just can be so that this force transmission, on the first load plate 5 and the second load plate 9, and then can be controlled the direction that is applied to acting force on tested sample.
As preferably, need rotation tested sample, the first load plate 5 and the second load plate 9, make to the tail end of the first loading pin 1 and the second loading pin 10 and apply acting force and gravity on same straight line.In embodiment, can first determine the angle in the first loading pin 1 and crack 3, then adjust tested sample, the first load plate 5 and the second load plate 9, again the first loading pin 1 is connected with the first load plate through hole 4 on the first load plate 5, so just guaranteed that the first loading pin 1 is perpendicular to surface level, the acting force that is applied to the first loading pin 1 tail end is consistent with gravity direction.In like manner, the installation method of the second loading pin 10 and the first loading pin 1 are similar, and just the second drill steel 12 above it inserts in any two second load plate through holes 11 of the second load plate 9 upper surfaces.As in Fig. 6, described the first loading pin 1 is 0 ° with the angle in crack 3; In Fig. 7, described the first loading pin 1 is 30 ° with the angle in crack 3; In Fig. 8, described the first loading pin 1 is 60 ° with the angle in crack 3.In this three width figure, the first loading pin 1 all keeps vertical with surface level with the second loading pin 10.
By the way the first load plate 5 and the second load plate 9 are applied the acting force of different directions.Because being L-type with the second load plate 9 with tested sample, the first load plate 5 contacts, but make the power that finally acts on tested sample be decomposed into the power of four choice directions, and avoided the interference of gravity, simulated the pressure that the soil body is subject to certain direction simultaneously, the phenomenon of cutting effect.
Claims (7)
1. the soil body is pressed and is cut composite rupture failure test method, it is characterized in that, comprises the following steps:
1) prepare tested sample, described tested sample is the cube soil block, comprises end face, bottom surface and four sides; The end face of described cube soil block is vertical with surface level with bottom surface;
2) in gap of one of them side opening of tested sample, described tested sample is one-sided cracks;
3) place the first load plate and the second load plate at the upper and lower of described tested sample; Described the first load plate and the second load plate are the L-type plate, or the inboard of described the first load plate and the second load plate has the L-type breach; Make two adjacent sides of described tested sample and the interior side contacts of the first load plate, and the interior side contacts of two sides that do not contact with described the first load plate and the second load plate;
4) the first load plate and the second load plate are applied simultaneously and point to the tested sample direction and perpendicular to the acting force of surface level.
2. the soil body according to claim 1 is pressed and is cut composite rupture failure test method, and it is characterized in that: four sides of described tested sample are respectively: the first side, the second side, the 3rd side and the 4th side; Step 2) in, the first ，Gai gap, side in tested sample is opened perpendicular to described the first side, end face and bottom surface in described gap, and described gap is divided into by the first side of tested sample two parts that area is equal; In step 3), the cross section of the inboard breach of the first load plate and the second load plate is L-type, and in described L-type, it is long that the length on long limit equals the rib of tested sample, and the length of minor face equals half that the rib of tested sample is grown.
3. the soil body according to claim 1 is pressed and cut composite rupture failure test method, it is characterized in that: in step 4), the acting force that the first load plate and the second load plate are applied simultaneously is respectively F
1and F
2; Described F
1and F
2equal and opposite in direction, opposite direction, and on the same straight line.
4. the soil body is pressed and is cut composite rupture failure test device, and it is characterized in that: comprise the first load plate (5) and the second load plate (9) that shape is identical, described the first load plate (5) and the second load plate (9) lay respectively at the upper and lower of tested sample; Described tested sample is a cube soil block with end face, bottom surface, the first side, the second side, the 3rd side and the 4th side; Described end face is vertical with surface level with bottom surface;
Described the first load plate (5) has two orthogonal towards a side of tested sample, i.e. α face and β face; During test, the 3rd contacts side surfaces of described α face and tested sample, the second contacts side surfaces of described β face and tested sample;
Described the second load plate (9) has two orthogonal towards a side of tested sample, i.e. γ face and δ face; During test, the first contacts side surfaces of described γ face and tested sample, the 4th contacts side surfaces of described δ face and tested sample.
5. the soil body according to claim 4 is pressed and is cut composite rupture failure test device, it is characterized in that: the first side of described tested sample has a gap perpendicular to tested sample end face and bottom surface, and described gap is divided into by the first side of tested sample two parts that area is equal; To equal the rib of tested sample long being parallel to width on tested sample end face or bottom surface direction for described α face and δ face, and described β face and γ face equal long half of the rib of tested sample being parallel to width on tested sample end face or bottom surface direction.
6. press and cut composite rupture failure test device according to the described soil body of claim 4 or 5, it is characterized in that: also comprise the first loading pin (1) and the second loading pin (10)
The upper surface of described the first load plate (5) has some the first load plate through holes (4), and the axis of described the first load plate through hole (4) is parallel to the intersection of α face and β face; The upper surface of described the second load plate (9) has some the second load plate through holes (11), and the axis of described the second load plate through hole (11) is parallel to the intersection of β face and γ face;
The front end of described the first loading pin (1) has the first drill steel (2); Described the second loading pin (10) front end there is the second drill steel (12);
During test, described the first drill steel (2) inserts in the first load plate through hole (4) of the first load plate (5) upper surface, and described the second drill steel (12) inserts in the second load plate through hole (11) of the second load plate (9) upper surface.
7. press and cut composite rupture failure test device according to the described soil body of claim 4 or 5, it is characterized in that: also comprise the displacement transducer (8) of measuring the first load plate (5) and the second load plate (9) displacement, and measure the load sensor (7) that is applied to the first load plate (5) and the upper amount of force of the second load plate (9).
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| CN105910898A (en) * | 2016-06-30 | 2016-08-31 | 新兴铸管股份有限公司 | Clamp used for shearing test of welding material and application method of clamp |
| CN106546477A (en) * | 2016-10-08 | 2017-03-29 | 四川大学 | For the test specimen component and method of testing of the test of fragile material type III Dynamic Fracture Toughness |
| CN107345874A (en) * | 2017-09-04 | 2017-11-14 | 桂林电子科技大学 | A kind of rupture failure experimental rig and method |
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| CN106546477A (en) * | 2016-10-08 | 2017-03-29 | 四川大学 | For the test specimen component and method of testing of the test of fragile material type III Dynamic Fracture Toughness |
| CN106546477B (en) * | 2016-10-08 | 2018-11-23 | 四川大学 | Test specimen component and test method for the test of fragile material type III Dynamic Fracture Toughness |
| CN107345874A (en) * | 2017-09-04 | 2017-11-14 | 桂林电子科技大学 | A kind of rupture failure experimental rig and method |
| CN113358482A (en) * | 2021-06-21 | 2021-09-07 | 重庆交通大学 | Class rock material fracture toughness testing arrangement with test piece retrieves function |
| CN113358482B (en) * | 2021-06-21 | 2023-10-10 | 重庆交通大学 | Rock-like material fracture toughness testing device with test piece recovery function |
| CN113702200A (en) * | 2021-07-15 | 2021-11-26 | 深圳大学 | Temperature-pressure coupling bidirectional electromagnetic loading dynamic compression-shear experimental device and test method |
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