CN107782599A - A kind of material breakdown experimental method - Google Patents
A kind of material breakdown experimental method Download PDFInfo
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- CN107782599A CN107782599A CN201710803736.6A CN201710803736A CN107782599A CN 107782599 A CN107782599 A CN 107782599A CN 201710803736 A CN201710803736 A CN 201710803736A CN 107782599 A CN107782599 A CN 107782599A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/32—Polishing; Etching
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- 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
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- 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
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
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Abstract
The present invention relates to a kind of material breakdown experimental method, the research that this material breakdown experimental method is related to the protective capacities that material destroys to kinetic energy and to material penetrate etc., in order to solve the existing indirect sex chromosome mosaicism that plastic zone is analyzed using finite element method, the present invention devises a kind of material breakdown experimental method, it is exactly to imitate one piece of overall sample with two pieces of semicircle samples are stitched together, two pieces of semicircle samples are made tightly to be against together with sufficiently large power during experiment, it is not in instantaneous opening or the situation of the changing of the relative positions that this, which pushes against two pieces of semicircle samples during confirmation of trying hard to keep is tested and supports joint close gap, then, breakdown processing is carried out in two pieces of supporting at joint close gap for semicircle sample, then remove and push against power separately sample, at this moment, the plastic zone upspring just is able to observe that on former abutting face.
Description
Technical field
The present invention relates to a kind of material breakdown experimental method.This material breakdown experimental method is related to material and kinetic energy is destroyed
Protective capacities and the research that to material penetrate etc..
Technical background
The technology for being punched out processing to material using various equipment and drift is widely used already, is obtained in practice
Good effect, significantly increase the production efficiency in many fields.
Many fields needs prevent the electrical breakdown that impact is brought to realize the purpose of protection, especially military equipment field
Armor facing, in order to deepen to recognize, the research to the microcosmic mechanism of material breakdown deformation, it is clear that it is extremely urgent, wherein just wrapping
Include the research in inner micro plastic deformation area (hereinafter referred to as plastic zone) in breakdown process.
It is to carry out breakdown processing to overall sample first that one kind, which is contemplated, and then the immediate vicinity in the hole that impact leaves hangs down
It is straight to cut sample downwards, then, observational study is carried out to the plastic zone for cutting face, but due to cutting the process of sample vertically downward
The sustained release of middle stress so that the plastic zone vestige instantaneously upspring is cut open processing and erased completely, can not be observed after incision
The vestige of plastic zone.
The common method of the research use to plastic zone is at present：It is residual that material breakdown is established using FEM-software ANSYS
The three-dimensional finite element model of residue stress field, difference sunykatuib analysis different breakdown aperture, impact kinetic energy, sample thickness and materials etc.
Three-dimension parameter design field distribution.
This method advantage is that the stress state of data extraction procedure plastic zone is interference-free.
Shortcoming is that acquired strain data is surface data, and the change of plastic zone occurs in the inside of material, plasticity
The situation in area can only be obtained indirectly by the method for finite element analysis, and this method needs to set a series of boundary condition, these
The basis of design of boundary condition is often and insufficient, causes finally to analyze obtained plastic zone and not fully meets truth,
It is limited to the directive significance of actual research and production.
The content of the invention
In order to solve the existing indirect sex chromosome mosaicism that plastic zone is analyzed using finite element method, inventor devises one
Kind material breakdown experimental method, can obtain plastic zone scope directly perceived and vivid and shape information.
This method is exactly to imitate one piece of overall sample with two pieces of semicircle samples are stitched together, makes two and half during experiment
Circular specimen is tightly against together with sufficiently large power, and this pushes against two pieces of semicircle samples during confirmation of trying hard to keep is tested and supports joint close
Gap is not in instantaneous opening or the situation of the changing of the relative positions, then, breakdown processing is carried out in two pieces of supporting at joint close gap for semicircle sample,
Then remove and push against power separately sample, at this moment, the plastic zone upspring just is able to observe that on former abutting face.
Specific practice is as follows：
Sample to be tested material is processed into two pieces first, has a face to carry out planar accurate grinding processing on each piece, to reach
Flatness and finish as high as possible.
Secondly, two dowel holes, a screwed hole and a shoulder hole are processed respectively on every piece of sample, it is ensured that two
The two bright and clean coplanar flats and relative engagement of block sample.
Two pieces of samples are connected to become two pieces of sample combinations with two alignment pins, two screws.
Two pieces of sample combinations are added external cylindrical surface and two end faces through being once loaded on lathe, and ensured in cylinder
Heart line is on two pieces of sample faying faces.
Machine two pieces of sample combinations are placed in open wedge set, utilize phase interworking on tightening sleeve, clamping sleeve
The screw thread of conjunction, screws clamping sleeve, so that between wedge-shaped sleeve wedging tightening sleeve and two pieces of sample combinations, combines system robust
For an entirety.
Drift is imported from the centre bore of clamping sleeve, and drift is loaded according to desin speed, drift combines from two pieces of samples
The center of body passes through, and brings breakdown to be plastically deformed to two pieces of sample combinations.
Two pieces of sample combinations are opened, the plastic extruding deformation area on every piece of sample upsprings because external force cancels, area of upspringing
Comprising information provide material breakdown deformation plastic zone research new way.
Brief description of the drawings
Accompanying drawing 1 is a kind of implementation process schematic diagram of material breakdown deformation plastic zone research method：1 is to put on drift
Pressure direction；2 be drift；3 be the pin-guide hole on clamping sleeve；4 be clamping sleeve；5 be tightening sleeve；6 be open wedge set；7 are
Right sample block；8 be left sample block；9 be the support force direction of supports right sample block and left sample agllutination zoarium.
Accompanying drawing 2 is the combination schematic diagram of right sample block 7 and left sample block 8：10 be on right sample block and left sample agllutination zoarium in pair
Two screws of linea angulata arrangement；11 be in two alignment pins of diagonal arrangement on right sample block and left sample agllutination zoarium.
Accompanying drawing 3 is that drift punctures two pieces of sample combination process schematics.
Accompanying drawing 4 is to open two pieces of sample combinations, and the breakdown plastically deforming area on every piece of sample is upspring because external force cancels
Schematic diagram：12 plastic zone to be upspring after two pieces of sample combinations of opening in ellipse circle.
Accompanying drawing 5 is a kind of another implementation process schematic diagram of material breakdown deformation plastic zone research method：1a is bullet
The direction of motion；2a is bullet；3a is the big preformed hole on clamping sleeve；4a is big preformed hole clamping sleeve；5 be tightening sleeve；6 be opening
Wedge-shaped sleeve；7 be right sample block；8 be left sample block；9 be the support force direction of supports right sample block and left sample agllutination zoarium.
Embodiment
Right sample block 7 and left sample block 8 are pushed against with two screws 10 and two alignment pins 11 and are combined into two pieces of sample combinations.
Two pieces of sample combinations are placed in open wedge set 6, using the screw thread to be cooperated on tightening sleeve 5 and clamping sleeve 4,
Clamping sleeve 4 is screwed, so that between the wedging tightening sleeve 5 of open wedge set 6 and two pieces of sample combinations, is combined into system robust
One entirety, such structure can prevent that instantaneous opening and mistake occur for the abutting face of right sample block 7 and left sample block 8 in experimentation
Dynamic situation.
In the effect of the support force 9 of supports right sample block 7 and the combination of left sample block 8 and the pressure 1 put on drift 2
Under, the drift 2 in pin-guide hole 3 is penetrated among right sample block 7 and left sample block 8, until penetrating certain depth or penetrating, causes right sample block
7 and left sample block 8 among a part within the specific limits sequentially there occurs plastic deformation, because generation is that extruding plasticity becomes
The combination of shape, right sample block 7 and left sample block 8 will not open to joint close.
Then remove the abutting power between right sample block 7 and left sample block 8, open two pieces of sample combinations, squeezing on every piece of sample
Compactibility deformation area upsprings because external force cancels, the plastic zone 12 upspring.
The plastic zone vestige 12 upspring is measured using means such as laser co-focusing microscopic analyses, analyzed, it becomes possible to
The information such as plastic zone scope, area and bounce amount are obtained, can analyze breakdown deformation according to these information should to material internal
The influence of field of force change.
Accompanying drawing 5 shows a kind of another implementation process of material breakdown deformation plastic zone research method：Bullet 2a according to
Direction of motion 1a injects from the big preformed hole 3a on clamping sleeve, the abutting seam combined through right sample block 7 and left sample block 8, leaves and hits
Perforation, two pieces of sample combinations are opened, the plastic extruding deformation area on every piece of sample upsprings because external force cancels, and obtains opening two
The plastic zone 12 upspring after block sample combination.
Claims (5)
1. a kind of material breakdown experimental method it is characterized in that：One piece of overall examination is imitated with two pieces of semicircle samples are stitched together
Sample, two pieces of semicircle samples is tightly against together with sufficiently large power during experiment, then, closed in two pieces of supporting for semicircle sample
Breakdown processing is carried out at gap, then removes and pushes against power separately sample, at this moment, be just able to observe that what is upspring on former abutting face
Plastic zone, right sample block (7) and left sample block (8) push against and are combined into two pieces of sample combinations, in supports right sample block (7) and left sample block
(8) for the support force (9) of combination with putting in the presence of the pressure (1) on drift (2), drift (2) penetrates right sample block (7)
With left sample block (8) centre, until penetrating, cause a part for right sample block (7) and left sample block (8) centre order within the specific limits
Ground then removes the abutting power between right sample block (7) and left sample block (8), opens two pieces of sample combinations, often there occurs plastic deformation
Extruding plastic deformation area on block sample upsprings because external force cancels, the plastic zone (12) upspring.
2. a kind of material breakdown experimental method as described in claim 1 it is characterized in that：Positioned with two screws (10) and two
Pin (11) pushes against right sample block (7) and left sample block (8) and is combined into two pieces of sample combinations, and two pieces of sample combinations are placed in opening wedge
In shape set (6), using the screw thread to be cooperated on tightening sleeve (5) and clamping sleeve (4), clamping sleeve (4) is screwed, so that opening wedge
Between shape set (6) wedging tightening sleeve (5) and two pieces of sample combinations, it is integrated into a whole system robust, such structure
It can prevent that instantaneous situation about opening with the changing of the relative positions occurs for the face that pushes against of right sample block (7) and left sample block (8) in experimentation.
3. a kind of material breakdown experimental method as described in claim 1 it is characterized in that：In supports right sample block (7) and left sample block
(8) support force (9) of combination with putting in the presence of the pressure (1) on drift (2), wear by the drift (2) in pin-guide hole (3)
Enter right sample block (7) and left sample block (8) centre, until penetrating certain depth, cause the one of right sample block (7) and left sample block (8) centre
Sequentially there occurs plastic deformation within the specific limits for part.
4. a kind of material impact experimental method as described in claim 1 it is characterized in that：Bullet (2a) is according to the direction of motion (1a)
Injected from the big preformed hole (3a) on clamping sleeve, the abutting seam combined through right sample block (7) and left sample block (8), leave blow hole,
Two pieces of sample combinations are opened, the plastic extruding deformation area on every piece of sample upsprings because external force cancels, and obtains opening two pieces of examinations
The plastic zone (12) upspring after sample combination.
5. a kind of material impact experimental method as described in claim 1 it is characterized in that：Utilize laser co-focusing microscopic analysis etc.
Means are measured to the plastic zone vestige (12) upspring, analyzed, it becomes possible to obtain plastic zone scope, area and bounce amount etc.
Information, influence of the breakdown deformation to material internal change of stress field can be analyzed according to these information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710803736.6A CN107782599B (en) | 2017-09-08 | 2017-09-08 | Material breakdown experiment method |
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| CN201710803736.6A CN107782599B (en) | 2017-09-08 | 2017-09-08 | Material breakdown experiment method |
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| CN107782599A true CN107782599A (en) | 2018-03-09 |
| CN107782599B CN107782599B (en) | 2020-12-29 |
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| CN201710803736.6A Expired - Fee Related CN107782599B (en) | 2017-09-08 | 2017-09-08 | Material breakdown experiment method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110031315A (en) * | 2019-05-29 | 2019-07-19 | 吉林大学 | A kind of material hole extrusion experiment method |
| CN110031342A (en) * | 2019-05-29 | 2019-07-19 | 吉林大学 | A kind of material breakdown experimental method |
| CN110441125A (en) * | 2019-07-15 | 2019-11-12 | 武汉大学 | Utilize the impact of linear pulse laser simulating trajectory and the device and method of real-time monitoring |
| CN112577984A (en) * | 2020-11-09 | 2021-03-30 | 中国科学院金属研究所 | Preparation method of block sample for observing deformation behavior of zirconium alloy |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110031315A (en) * | 2019-05-29 | 2019-07-19 | 吉林大学 | A kind of material hole extrusion experiment method |
| CN110031342A (en) * | 2019-05-29 | 2019-07-19 | 吉林大学 | A kind of material breakdown experimental method |
| CN110441125A (en) * | 2019-07-15 | 2019-11-12 | 武汉大学 | Utilize the impact of linear pulse laser simulating trajectory and the device and method of real-time monitoring |
| CN110441125B (en) * | 2019-07-15 | 2020-11-13 | 武汉大学 | Device and method for simulating ballistic impact and monitoring in real time by using linear pulse laser |
| CN112577984A (en) * | 2020-11-09 | 2021-03-30 | 中国科学院金属研究所 | Preparation method of block sample for observing deformation behavior of zirconium alloy |
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