CN115266387A - Mechanics experiment method and device for realizing negative stress triaxial degree through isostatic loading - Google Patents

Mechanics experiment method and device for realizing negative stress triaxial degree through isostatic loading Download PDF

Info

Publication number
CN115266387A
CN115266387A CN202211177920.1A CN202211177920A CN115266387A CN 115266387 A CN115266387 A CN 115266387A CN 202211177920 A CN202211177920 A CN 202211177920A CN 115266387 A CN115266387 A CN 115266387A
Authority
CN
China
Prior art keywords
experiment
mechanical
stress
rod
compression
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202211177920.1A
Other languages
Chinese (zh)
Inventor
王涛
赵辰辰
和东平
任忠凯
孙其美
覃志伟
史汉卿
黄庆学
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Taiyuan University of Technology
Original Assignee
Taiyuan University of Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Taiyuan University of Technology filed Critical Taiyuan University of Technology
Priority to CN202211177920.1A priority Critical patent/CN115266387A/en
Publication of CN115266387A publication Critical patent/CN115266387A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
    • G01N3/12—Pressure testing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/22—Investigating strength properties of solid materials by application of mechanical stress by applying steady torsional forces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0001—Type of application of the stress
    • G01N2203/0003—Steady
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014—Type of force applied
    • G01N2203/0016—Tensile or compressive
    • G01N2203/0017—Tensile
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014—Type of force applied
    • G01N2203/0016—Tensile or compressive
    • G01N2203/0019—Compressive
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014—Type of force applied
    • G01N2203/0021—Torsional
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/003—Generation of the force
    • G01N2203/0042—Pneumatic or hydraulic means
    • G01N2203/0048—Hydraulic means

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

The invention discloses a mechanical experiment method and a device for realizing negative stress triaxial degree by isostatic pressing loading, wherein the method comprises the following steps: preparing an experiment, namely preparing a compression/tension/torsion sample required by the experiment, and putting the compression/tension/torsion sample into experimental equipment; adjusting parameters of experimental equipment, setting a hydrostatic stress value required by an experiment and checking the sealing property of the equipment; carrying out a static pressure loading mechanical experiment, and carrying out a mechanical compression/tension/torsion experiment at a certain speed through experimental equipment; data were recorded and the compression/tension/torsion samples from the completed experiment were removed and the experimental data recorded. The invention realizes the mechanical experiment under different stress triaxial degrees by changing the size of the hydrostatic stress borne by the sample, the experimental method has higher adjustability, can efficiently and accurately realize the compression/tension/torsion mechanical experiment under different stress triaxial degrees, and provides a reliable and stable method for related researches such as exploring and verifying the toughness fracture mechanism of metal.

Description

Mechanics experiment method and device for realizing negative stress triaxial degree through isostatic loading
Technical Field
The invention relates to the field of metal mechanical property inspection, in particular to a mechanical experiment method and device for realizing negative stress triaxiality by isostatic pressing loading.
Background
Metal products have wide application in industrial manufacturing, aerospace, and marine shipping. However, plastic deformation of metal products during service is liable to cause accumulation of damage and even ductile fracture behavior. Therefore, the research on the damage evolution behavior of the metal product is beneficial to the improvement of the product performance and the subsequent forming process.
The stress triaxial degree is used as the ratio of the hydrostatic stress to the equivalent stress of the Von-Mises and is used for describing the stress state of the matrix. Recent studies show that the damage evolution of metal is closely related to the magnitude of three axial degrees of stress of a matrix. In order to explore the influence of three axes of different stresses on the damage evolution, the common practice is to change the geometry of a tensile/compressive specimen and perform a tensile/compressive test in a mechanical testing machine. However, the change of the geometric shape of the sample can only be performed for a specific triaxial stress value, and the study of the influence of the triaxial stress on the damage evolution is still limited, for example, it is difficult to implement a mechanical experiment in which the triaxial stress is smaller than-1, and the triaxial stress on the sample can change along with the deformation of the sample when the shape of the sample is changed in the mechanical loading experiment, so that the accuracy of the experiment can be influenced to a certain extent. In addition, the torsion test under different stress triaxial degrees can not be realized by changing the geometric shape of the sample, so a universal and reliable test method and device are needed to solve the above problems.
Disclosure of Invention
The invention aims to provide a method and a device for realizing a mechanical experiment of negative stress triaxial degree by isostatic pressing loading, so as to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following scheme: the invention provides a mechanical experiment method for realizing negative stress triaxial degree by isostatic pressing loading, which comprises the following steps of:
a. preparation of the experiment: preparing a compression/tension/torsion sample required by an experiment, and putting the compression/tension/torsion sample into experiment equipment;
b. adjusting parameters of experimental equipment: setting a hydrostatic stress value required by an experiment and checking the tightness of experimental equipment;
c. carrying out a static pressure loading mechanical experiment, changing the hydrostatic stress of a sample by using sample equipment, and carrying out a mechanical compression/tension/torsion experiment;
d. recording data: the compression/tension/torsion samples from the completed experiment were removed and the experimental data recorded.
Preferably, the calculation formula of the hydrostatic stress in the step c is as follows:
Figure 62954DEST_PATH_IMAGE001
；
in the formula:
Figure 42411DEST_PATH_IMAGE002
in order to be under the hydrostatic stress,
Figure 369619DEST_PATH_IMAGE003
the first, second and third main stresses are respectively;
the calculation formula of the Von-Mises equivalent stress is as follows:
Figure 827145DEST_PATH_IMAGE004
；
in the formula:
Figure 110359DEST_PATH_IMAGE005
for the Von-Mises equivalent stress,
Figure 198400DEST_PATH_IMAGE006
respectively a first main bias stress, a second main bias stress and a third main bias stress;
the calculation formula of the stress triaxial degree is as follows:
Figure 777018DEST_PATH_IMAGE007
。
preferably, the device does experimental facilities, experimental facilities includes the frame, the bottom and the base rigid coupling of frame, the rigid coupling has pressure vessel on the base, the rigid coupling has the elevating platform in the frame, the elevating platform is located pressure vessel's top, the bottom surface rigid coupling of elevating platform has the transfer line, the bottom rigid coupling of transfer line has the mechanics member, the bottom of mechanics member stretches into in the pressure vessel, be equipped with liquid medium in the pressure vessel, pressure vessel keeps away from one side sliding connection of transfer line has the static pressure depression bar.
Preferably, an end cover is installed on the top surface of the pressure container, and the mechanical rod piece penetrates through the end cover and extends into the pressure container.
Preferably, the side wall of the pressure container is provided with an observation window.
Preferably, the side wall of the pressure container is provided with a pressure display, and the pressure display is positioned at the top of the observation window.
Preferably, the liquid medium is water or glycerol.
Preferably, the mechanical rod is a compression rod, the compression rod penetrates through the end cover and is fixedly connected with the transmission rod, and one end of the compression rod, which is located in the pressure container, is matched with the compression sample.
Preferably, the mechanical rod is a stretching rod, the stretching rod penetrates through the end cover and is fixedly connected with the transmission rod, and one end of the stretching rod, which is located in the pressure container, is matched with the tensile sample.
Preferably, the mechanical rod piece is a torsion rod, the torsion rod penetrates through the end cover and is fixedly connected with the transmission rod, and one end of the torsion rod, which is located in the pressure container, is matched with the torsion sample.
The invention discloses the following technical effects: the invention realizes the mechanical experiment under different stress triaxial degrees by changing the size of the hydrostatic stress borne by the sample, the experimental method has higher adjustability, can efficiently and accurately realize the compression/tension/torsion mechanical experiment under different stress triaxial degrees, and provides a reliable and stable method for related researches such as exploring and verifying the toughness fracture mechanism of metal.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic structural diagram of a mechanical experiment device for realizing negative stress triaxial degree by isostatic pressing loading;
FIG. 2 is a schematic diagram of a static pressure loading compression experiment according to the present invention;
FIG. 3 is a schematic structural view of a static pressure loading tensile test according to the present invention;
FIG. 4 is a schematic structural diagram of a static pressure loading torsion test of the present invention;
wherein: 1. a frame; 2. an end cap; 3. a pressure vessel; 4. an observation window; 5. a lifting platform; 6. a transmission rod; 7. a mechanical bar member; 8. a pressure display; 9. a base; 10. a compression bar; 11. a liquid medium; 12. compressing the sample; 13. a static pressure lever; 14. a stretch rod; 15. stretching a sample; 16. a torsion bar; 17. the sample is twisted.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Referring to fig. 1-4, the invention provides a mechanical experiment method for realizing negative stress triaxial degree by isostatic pressing loading, which comprises the following steps:
a. preparing an experiment, namely preparing a compression/tension/torsion sample required by the experiment, and putting the compression/tension/torsion sample into experimental equipment;
b. adjusting parameters of experimental equipment, setting a hydrostatic stress value required by an experiment and checking the tightness of the experimental equipment;
c. carrying out a static pressure loading mechanical experiment, changing the hydrostatic stress of a sample by using sample equipment, and carrying out a mechanical compression/tension/torsion experiment;
d. data were recorded and the compression/tension/torsion samples from the completed experiment were removed and the experimental data recorded.
The compression experiment is carried out by the following specific steps:
s1: opening the end cap 2 of the pressure vessel 3 and placing the compressed sample 12 into the bottom center region of the pressure vessel 3;
s2: pouring a liquid medium 11 into the pressure container 3 to the end face of the pressure container 3, mounting the end cover 2 at the back, checking the sealing performance of the end cover, adjusting the compression rod 10 to vertically move downwards until the compression rod is contacted with the upper surface of the compression sample 12, and adjusting the static pressure rod 13 to move downwards to a specified position according to a static water stress value required by an experiment;
s3: the compression rod 10 is vertically moved downwards at a certain speed to carry out a static pressure loading compression experiment;
s4: the static pressure adjusting pressure rod 13 moves vertically upwards to release pressure, and then the end cover 2 of the pressure container 3 is opened and the compressed sample 12 is taken out.
The specific steps in the tensile test are as follows:
s1: opening the end cap 2 of the pressure vessel 3 and placing a tensile specimen 15 into the bottom central region of the pressure vessel 3;
s2: pouring a liquid medium 11 into the pressure container 3 to the end face of the pressure container 3, then adjusting the stretching rod 14 to vertically move downwards, then hanging the stretching sample 15 on the stretching rod 14, and then adjusting the static pressure rod 13 to move downwards to a specified position according to a static water stress value required by an experiment;
s3: the stretching rod 14 is vertically moved upwards at a certain speed to carry out a static pressure loading stretching experiment;
s4: the static pressure adjusting pressure rod 13 moves vertically upwards to release pressure, and then the end cover 2 of the pressure container 3 is opened and the tensile sample 15 is taken out.
The specific steps in the torsion test are as follows:
s1: opening the end cap 2 of the pressure vessel 3 and placing the torsion specimen 17 into the bottom center region of the pressure vessel 3;
s2: pouring a liquid medium 11 into the pressure container 3 to the end face of the pressure container 3, then adjusting the torsion rod 16 to vertically move downwards, then installing the torsion sample 17 on the torsion rod 16, and then adjusting the static pressure compression rod 13 to move downwards to a specified position according to a static water stress value required by an experiment;
s3: twisting the torsion bar 16 at a certain speed to perform a static pressure loading twisting experiment;
s4: and adjusting the static pressure compression bar 13 to move vertically upwards for pressure relief, then opening the end cover 2 of the pressure container 3 and taking out the torsion sample 17.
In a further optimization scheme, the calculation formula of the hydrostatic stress is as follows:
Figure 772656DEST_PATH_IMAGE001
；
in the formula:
Figure 51322DEST_PATH_IMAGE002
in order to be the hydrostatic stress, the stress is,
Figure 513527DEST_PATH_IMAGE003
the first, second and third main stresses are respectively;
the calculation formula of the Von-Mises equivalent stress is as follows:
Figure 861332DEST_PATH_IMAGE008
；
in the formula:
Figure 67185DEST_PATH_IMAGE005
for the Von-Mises equivalent stress,
Figure 433313DEST_PATH_IMAGE006
respectively a first main bias stress, a second main bias stress and a third main bias stress;
the calculation formula of the stress triaxial degree is as follows:
Figure 659895DEST_PATH_IMAGE007
。
further optimization scheme, the mechanical experiment device for realizing three-axis degree of negative stress by isostatic pressing loading is the above experimental equipment, the experimental equipment comprises a rack 1, the bottom of the rack 1 is fixedly connected with a base 9, a pressure container 3 is fixedly connected to the base 9, a lifting table 5 is fixedly connected in the rack 1, the lifting table 5 is located at the top of the pressure container 3, a transmission rod 6 is fixedly connected to the bottom surface of the lifting table 5, a mechanical rod member 7 is fixedly connected to the bottom of the transmission rod 6, the bottom of the mechanical rod member 7 extends into the pressure container 3, a liquid medium 11 is arranged in the pressure container 3, and a static pressure rod 13 is slidably connected to one side of the pressure container 3, which is far away from the transmission rod 6.
The mechanical rod 7 and the end cover 2 and the pressure container 3 are respectively sealed by sealing rings (not shown in the figure) to prevent the liquid medium 11 from flowing out in the pressurizing process.
The liquid medium 11 is injected into the pressure container 3, the experimental sample is immersed in the liquid medium, at the moment, the liquid medium 11 is pressurized by vertically moving the static pressure rod 13 downwards, so that the size of the hydrostatic stress applied to the sample is adjusted, the numerical value of the pressure display 8 is used for reflecting the size of the hydrostatic stress applied to the experimental sample, and the position of the static pressure rod 13 is adjusted to realize the tensile/compression/torsion experiment under different stress triaxial states. The invention realizes the mechanical experiment under different stress triaxial degrees by changing the size of the hydrostatic stress borne by the sample, has higher adjustability and can quickly realize the compression/tension/torsion mechanical experiment under different stress triaxial degrees.
In step c, the rate of vertical downward or upward movement of the compression rod 10, the stretching rod 14 or the torsion rod 16 can be adjusted according to the strain rate required by the experiment, and the specific calculation formula is as follows: strain rate = rod rate (mm/s)/height of the deformed area of the experimental specimen (mm).
The pressure container 3, the static pressure rod 13, the compression rod 10, the stretching rod 14 and the torsion rod 16 are made of stainless steel.
In a further optimized scheme, the side wall of the pressure container 3 is provided with an observation window 4. The observation window 4 is made of toughened glass.
In a further optimized scheme, the side wall of the pressure container 3 is provided with a pressure display 8, and the pressure display 8 is positioned at the top of the observation window 4. The pressure of the hydrostatic stress in the pressure vessel 3 is read by means of the pressure display 8.
In a further preferred embodiment, the liquid medium 11 is water or glycerol.
In a further optimized scheme, the mechanical rod piece is a compression rod 10, the compression rod 10 penetrates through the end cover 2 and is fixedly connected with the transmission rod 6, and one end, located in the pressure container 3, of the compression rod 10 is matched with the compression sample 12.
In a further optimized scheme, the mechanical rod piece 7 is a stretching rod 14, the stretching rod 14 penetrates through the end cover 2 and is fixedly connected with the transmission rod 6, and one end, located in the pressure container 3, of the stretching rod 14 is matched with the stretching sample 15.
In a further optimized scheme, the mechanical rod 7 is a torsion rod 16, the torsion rod 16 penetrates through the end cover 2 and is fixedly connected with the transmission rod 6, and one end, located in the pressure container 3, of the torsion rod 16 is matched with a torsion sample 17.
To facilitate an understanding of the static pressure loading test method of the present invention, the following examples are used for illustration.
Example 1
S1: a cylindrical compression sample 12 with the size of phi 6 multiplied by 9mm is placed in the central area of the bottom of the pressure vessel 3;
s2: pouring a liquid medium 11 into the pressure container 3 to the end face of the pressure container 3, then adjusting the compression rod 10 to vertically move downwards until the compression rod is contacted with the upper surface of the compressed sample 12, and then adjusting the static pressure compression rod 13 to vertically move downwards until the numerical value displayed by the pressure display 8 is 30MPa;
s3: the compression rod 10 is vertically moved downwards at the speed of 4.5mm/s to carry out a static pressure loading compression experiment;
s4: the static pressure adjusting pressure rod 13 moves vertically upwards to release pressure, and then the end cover 2 of the pressure container 3 is opened and the compressed sample 12 is taken out.
Example 2
S1: placing a tensile sample 15 with a deformation zone height of 10mm into the bottom center area of the pressure vessel 3;
s2: pouring a liquid medium 11 into the pressure container 3 to the end face of the pressure container 3, vertically moving a rear adjusting stretching rod 14 downwards, suspending a stretching sample 15 on the stretching rod 14, and vertically moving a rear adjusting static pressure compression rod 13 downwards until the value displayed by the pressure display 8 is 40MPa;
s3: the stretching rod 14 is vertically moved upwards at the speed of 5mm/s to carry out the static pressure loading stretching experiment;
s4: the static pressure adjusting pressure rod 13 moves vertically upwards to release pressure, and then the end cover 2 of the pressure container 3 is opened and the tensile sample 15 is taken out.
Example 3
S1: placing a cylindrical torsion sample 17 with a shearing area diameter of 8mm into the central area of the bottom of the pressure vessel 3;
s2: pouring a liquid medium 11 into the pressure container 3 to the end face of the pressure container 3, then suspending a torsion sample 17 on a torsion rod 16, and then adjusting a static pressure compression bar 13 to vertically move downwards until the numerical value displayed by a pressure display 8 is 50MPa;
s3: the torsion bar 10 was rotated at 0.5rad/s for static pressure loading torsion test;
s4: and adjusting the static pressure compression bar 13 to move vertically upwards for pressure relief, then opening the end cover 2 of the pressure container 3 and taking out the torsion sample 17.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.

Claims (10)

1. A mechanics experiment method for realizing negative stress triaxial degree by isostatic pressing loading is characterized by comprising the following steps:
a. preparation of the experiment: preparing a compression/tension/torsion sample required by an experiment, and putting the compression/tension/torsion sample into experiment equipment;
b. adjusting parameters of experimental equipment: setting a hydrostatic stress value required by an experiment and checking the tightness of experimental equipment;
c. carrying out a static pressure loading mechanical experiment, changing the hydrostatic stress of a sample by using sample equipment, and carrying out a mechanical compression/tension/torsion experiment;
d. recording data: the compression/tension/torsion samples from the completed experiment were removed and the experimental data recorded.
2. The mechanical experiment method for realizing three-axis degree of negative stress by isostatic pressing loading according to claim 1, wherein the method comprises the following steps: the calculation formula of the hydrostatic stress in the step c is as follows:
Figure 774827DEST_PATH_IMAGE001
；
in the formula:
Figure 518792DEST_PATH_IMAGE002
in order to be the hydrostatic stress, the stress is,
Figure 490159DEST_PATH_IMAGE003
the first, second and third main stresses are respectively;
the calculation formula of the Von-Mises equivalent stress is as follows:
Figure 294167DEST_PATH_IMAGE004
；
in the formula:
Figure 288668DEST_PATH_IMAGE005
for the Von-Mises equivalent stress,
Figure 210225DEST_PATH_IMAGE006
the first, second and third main bias stresses are respectively;
the calculation formula of the stress triaxial degree is as follows:
Figure 911465DEST_PATH_IMAGE007
。
3. the device for realizing the mechanical experiment method for realizing the three-axis degree of negative stress by isostatic pressing loading according to any one of claims 1-2 is characterized in that: the device does experimental facilities, experimental facilities includes frame (1), the bottom and base (9) rigid coupling of frame (1), the rigid coupling has pressure vessel (3) on base (9), the rigid coupling has elevating platform (5) in frame (1), elevating platform (5) are located the top of pressure vessel (3), the bottom surface rigid coupling of elevating platform (5) has transfer line (6), the bottom rigid coupling of transfer line (6) has mechanics member (7), the bottom of mechanics member (7) stretches into in the pressure vessel (3), be equipped with liquid medium (11) in pressure vessel (3), pressure vessel (3) are kept away from one side sliding connection of transfer line (6) has static pressure pole (13).
4. The mechanical experiment device for realizing three-axis degree of negative stress by isostatic pressing loading according to claim 3, wherein: an end cover (2) is installed on the top surface of the pressure container (3), and a mechanical rod piece (7) penetrates through the end cover (2) and extends into the pressure container (3).
5. The mechanical experiment device for realizing three-axis degree of negative stress by isostatic pressing loading according to claim 4, wherein: and an observation window (4) is arranged on the side wall of the pressure container (3).
6. The mechanical experiment device for realizing three-axis degree of negative stress by isostatic pressing loading according to claim 5, wherein: the side wall of the pressure container (3) is provided with a pressure display (8), and the pressure display (8) is positioned at the top of the observation window (4).
7. The mechanical experiment device for realizing three-axis degree of negative stress by isostatic pressing loading according to claim 3, wherein: the liquid medium (11) is water or glycerol.
8. The device for realizing the mechanics experiment of negative stress triaxial degree according to the isostatic pressing loading of claim 4, wherein: the mechanical rod piece is a compression rod (10), the compression rod (10) penetrates through the end cover (2) and is fixedly connected with the transmission rod (6), and one end, located in the pressure container (3), of the compression rod (10) is matched with the compression sample (12).
9. The mechanical experiment device for realizing three-axis degree of negative stress by isostatic pressing loading according to claim 4, wherein: the mechanical rod piece (7) is a stretching rod (14), the stretching rod (14) penetrates through the end cover (2) and is fixedly connected with the transmission rod (6), and one end, located in the pressure container (3), of the stretching rod (14) is matched with the stretching sample (15).
10. The mechanical experiment device for realizing three-axis degree of negative stress by isostatic pressing loading according to claim 4, wherein: the mechanical rod piece (7) is a torsion rod (16), the torsion rod (16) penetrates through the end cover (2) and is fixedly connected with the transmission rod (6), and one end, located in the pressure container (3), of the torsion rod (16) is matched with the torsion sample (17).
CN202211177920.1A 2022-09-27 2022-09-27 Mechanics experiment method and device for realizing negative stress triaxial degree through isostatic loading Pending CN115266387A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211177920.1A CN115266387A (en) 2022-09-27 2022-09-27 Mechanics experiment method and device for realizing negative stress triaxial degree through isostatic loading

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211177920.1A CN115266387A (en) 2022-09-27 2022-09-27 Mechanics experiment method and device for realizing negative stress triaxial degree through isostatic loading

Publications (1)

Publication Number Publication Date
CN115266387A true CN115266387A (en) 2022-11-01

Family

ID=83757001

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211177920.1A Pending CN115266387A (en) 2022-09-27 2022-09-27 Mechanics experiment method and device for realizing negative stress triaxial degree through isostatic loading

Country Status (1)

Country Link
CN (1) CN115266387A (en)

Citations (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007225405A (en) * 2006-02-23 2007-09-06 Univ Chuo Triaxial testing machine and program therefor
CN101949800A (en) * 2010-08-24 2011-01-19 清华大学 Pressing-twisting multi-shaft loading testing machine
CN102645375A (en) * 2012-04-24 2012-08-22 哈尔滨工业大学 Material mechanical property testing method under three-dimensional stress state
CN103149101A (en) * 2013-02-28 2013-06-12 西安理工大学 Multifunctional triaxial creep testing machine with soil body pulling, pressing, twisting and shearing functions
CN103149078A (en) * 2013-02-28 2013-06-12 西安理工大学 Tension-compression-torsion-shearing coupling-based stress path triaxial apparatus
CN103163021A (en) * 2013-02-04 2013-06-19 上海交通大学 Damage model parameter calibration method facing resultant stress three-axis degree range
CN103196758A (en) * 2013-04-03 2013-07-10 哈尔滨理工大学 Device and method for testing forming property of sheet material under effect of fluid pressure
CN104048879A (en) * 2014-07-02 2014-09-17 南京力淮软件科技有限公司 Full-automatic three-axis testing system for saturated soil stress path
CN109100105A (en) * 2018-08-20 2018-12-28 江苏大学 A kind of vibrationfatigue test device and method under high pressure hydrogen environment
CN109342189A (en) * 2018-10-09 2019-02-15 华东理工大学 A kind of tension and torsion multiaxis fracture experiment system and experimental method
CN109540689A (en) * 2019-01-10 2019-03-29 苏州汇才土水工程科技有限公司 The novel three axis dead load compression of one kind and rheological test machine
CN209460049U (en) * 2019-01-10 2019-10-01 苏州汇才土水工程科技有限公司 The novel three axis dead load compression of one kind and rheological test machine
CN110441157A (en) * 2019-08-08 2019-11-12 中国地质大学（武汉） A kind of rock confining pressure loading device for laser drilling experiment
CN111024462A (en) * 2018-10-09 2020-04-17 中国科学院金属研究所 Sample design and experiment method for realizing high hydrostatic pressure and accurate temperature measurement and control
CN211477894U (en) * 2019-12-19 2020-09-11 贵州大学 Experimental device for research hydrostatic pressure acts on rock
CN111665127A (en) * 2020-06-09 2020-09-15 北京科技大学 Clamp for plate compression-shear fracture analysis sample, method thereof and sample
CN111965039A (en) * 2020-08-25 2020-11-20 贵州大学 Experimental device for research moves/hydrostatic pressure to rock mechanical properties's influence
CN113049398A (en) * 2021-03-10 2021-06-29 华东理工大学 High-temperature creep rupture experimental method and device reflecting multi-axis stress action
CN113820212A (en) * 2021-09-23 2021-12-21 浙江大学 Mechanics experimental system of softwood material under high hydrostatic pressure environment
CN114894597A (en) * 2022-04-20 2022-08-12 中国石油化工股份有限公司 Metal ductile fracture strain calculation method and system
JP2022130931A (en) * 2021-02-26 2022-09-07 東レ株式会社 Method for identifying plate shape, method for evaluating material characteristics, and test piece

Patent Citations (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007225405A (en) * 2006-02-23 2007-09-06 Univ Chuo Triaxial testing machine and program therefor
CN101949800A (en) * 2010-08-24 2011-01-19 清华大学 Pressing-twisting multi-shaft loading testing machine
CN102645375A (en) * 2012-04-24 2012-08-22 哈尔滨工业大学 Material mechanical property testing method under three-dimensional stress state
CN103163021A (en) * 2013-02-04 2013-06-19 上海交通大学 Damage model parameter calibration method facing resultant stress three-axis degree range
CN103149101A (en) * 2013-02-28 2013-06-12 西安理工大学 Multifunctional triaxial creep testing machine with soil body pulling, pressing, twisting and shearing functions
CN103149078A (en) * 2013-02-28 2013-06-12 西安理工大学 Tension-compression-torsion-shearing coupling-based stress path triaxial apparatus
CN103196758A (en) * 2013-04-03 2013-07-10 哈尔滨理工大学 Device and method for testing forming property of sheet material under effect of fluid pressure
CN104048879A (en) * 2014-07-02 2014-09-17 南京力淮软件科技有限公司 Full-automatic three-axis testing system for saturated soil stress path
CN109100105A (en) * 2018-08-20 2018-12-28 江苏大学 A kind of vibrationfatigue test device and method under high pressure hydrogen environment
CN111024462A (en) * 2018-10-09 2020-04-17 中国科学院金属研究所 Sample design and experiment method for realizing high hydrostatic pressure and accurate temperature measurement and control
CN109342189A (en) * 2018-10-09 2019-02-15 华东理工大学 A kind of tension and torsion multiaxis fracture experiment system and experimental method
CN109540689A (en) * 2019-01-10 2019-03-29 苏州汇才土水工程科技有限公司 The novel three axis dead load compression of one kind and rheological test machine
CN209460049U (en) * 2019-01-10 2019-10-01 苏州汇才土水工程科技有限公司 The novel three axis dead load compression of one kind and rheological test machine
CN110441157A (en) * 2019-08-08 2019-11-12 中国地质大学（武汉） A kind of rock confining pressure loading device for laser drilling experiment
CN211477894U (en) * 2019-12-19 2020-09-11 贵州大学 Experimental device for research hydrostatic pressure acts on rock
CN111665127A (en) * 2020-06-09 2020-09-15 北京科技大学 Clamp for plate compression-shear fracture analysis sample, method thereof and sample
CN111965039A (en) * 2020-08-25 2020-11-20 贵州大学 Experimental device for research moves/hydrostatic pressure to rock mechanical properties's influence
JP2022130931A (en) * 2021-02-26 2022-09-07 東レ株式会社 Method for identifying plate shape, method for evaluating material characteristics, and test piece
CN113049398A (en) * 2021-03-10 2021-06-29 华东理工大学 High-temperature creep rupture experimental method and device reflecting multi-axis stress action
CN113820212A (en) * 2021-09-23 2021-12-21 浙江大学 Mechanics experimental system of softwood material under high hydrostatic pressure environment
CN114894597A (en) * 2022-04-20 2022-08-12 中国石油化工股份有限公司 Metal ductile fracture strain calculation method and system

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
贾良玖: "《强震下金属结构的超低周疲劳破坏》", 30 November 2019 *
郑茂盛等: "韧性损伤模型在负的应力三轴度下的实验验证", 《西北工业大学学报》 *

Similar Documents

Publication Publication Date Title
CN106353181B (en) The asymmetric clamping device and experimental method of thin plate compression
CN108344642B (en) Creep experiment device based on gravity loading three-point bending and testing method
CN101881709A (en) Novel stress corrosion test specimen and experiment method
CN103364262A (en) Combined experimental device for polymer environmental stress cracking
CN109060552B (en) Thermal environment resilience test equipment and test method
CN115266387A (en) Mechanics experiment method and device for realizing negative stress triaxial degree through isostatic loading
CN106546491B (en) Detachable rock mass lateral load and water pressure coupling auxiliary test device
CN106644730A (en) Stress-strain measuring device and method for thin-plate transformation process under complex stress path
CN104502212A (en) Loading device of corrosion test of concrete sample under stress action
CN204286971U (en) The charger of a kind of concrete sample corrosion test under effect of stress
CN202770717U (en) Strain control device for high-temperature tension test of foil strips
CN216955526U (en) Bulging test device for testing creep property of metal sheet
CN209327134U (en) A kind of simple stainless steel and alloy material Huey test bend test device
CN106438729B (en) A kind of large thin-wall aluminium alloy oscillating bearing co-deflection assembly method and assembly device
Fessler et al. A 30 ton biaxial tensile testing machine
CN205280487U (en) Adjustable crooked tensile stress loading device
CN114323991A (en) Creep fatigue test device for high-temperature lead bismuth environment
CN109932246B (en) Geosynthetic material roof pressure creep test device
CN109297847B (en) Scratch-resistant device for quantitatively measuring material by dynamic method and using method thereof
CN209356290U (en) A kind of three axis loading devices suitable for three-dimensional photoelasticity model
CN220961146U (en) Stress corrosion testing machine
CN113567265A (en) Concrete bending moment testing device and testing method thereof
CN219608632U (en) Double-shaft creep testing device for large-size titanium alloy of ocean engineering
CN110006743B (en) Built-in mechanical lever loading device for high-low temperature container
JP7425304B2 (en) expansion test equipment

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20221101