CN102778371A - Method for fabricating brittle medium test sample containing three-dimensional preset defect - Google Patents
Method for fabricating brittle medium test sample containing three-dimensional preset defect Download PDFInfo
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- CN102778371A CN102778371A CN2012102357334A CN201210235733A CN102778371A CN 102778371 A CN102778371 A CN 102778371A CN 2012102357334 A CN2012102357334 A CN 2012102357334A CN 201210235733 A CN201210235733 A CN 201210235733A CN 102778371 A CN102778371 A CN 102778371A
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Abstract
The invention discloses a method for fabricating a brittle medium test sample containing a three-dimensional preset crack defect. The spatial position of a crack can be digitally positioned, a rock body is cut up along the symmetrical planes of the crack, the preset crack is precisely fabricated with the digital control machine tool method, and finally, the cut surfaces are adhered by super glue, so that the fabricated crack is provided with an internal three-dimensional crack defect. With the method, the continuity and authenticity of an initial defect in a brittle medium can be guaranteed.
Description
Technical field
The present invention is a kind of novel experimental sample method for making, is mainly used in to carry out to contain the research that three-dimensional presets the behavior of defective fragility dielectric breakdown, also may extend in the similar sample production of other material structure simultaneously.
Background technology
Test to the cracking, expansion, perforation and the destruction that contain defective rock, concrete fragility medium is the focus of studying in the world always, also is the important means of obtaining fragility medium constitutive relation and the expansion of research internal crack.Fragility media such as rock, concrete, pottery are a kind of many cracks, material heterogeneous, show as the inner micro-crack of medium, recessive crackle, hole and weak district etc. on thin the sight, then show as rupture surface, crack etc. on the macroscopic view.In actual engineering, the destruction of sillar or concrete material changes at the disturbance in the external world and pressure often does the time spent, and inner recessive three-dimensional cracks transfers dominance condition gradually to, the damage localization occurs, and then disintegrates, destroys.Research to the behavior of fragility dielectric breakdown is mainly carried out through theory, digital simulation and physical test three aspects, and wherein physical test is the most direct and reliable research means.Fragility medium underbead crack in the actual engineering all is three-dimensional from essence; But in experimental study in the past; The reason such as big and observation difficulty owing to crack defective difficulty of processing; People are many to be reduced to it two-dimentional crackle or with material substitution rocks such as organic glass, to cause test findings not conform to actual conditions.The present invention has provided the method for making that rock type fragility medium three-dimensional presets defective.
Summary of the invention
The objective of the invention is to make and contain the heterogeneous body fragility media samples that three-dimensional presets defective, said method comprises:
Make and do not contain the heterogeneous body fragility media samples that three-dimensional presets defective;
Said sample is cut into two or more parts, and every part marked is convenient to later stage integrator again;
Cut surface in every part presets defective to its inner formation respectively;
With the butt joint of all parts, move towards constant according to mark with what guarantee defective, and with all parts integrator again.
Said sample is materials such as rock, concrete or pottery.
Said sample is a marble.
The shape of said sample is a regular shape or irregularly shaped.
Said specimen shape is a rectangular parallelepiped.
It is simple check line, two crackle or multiple cracks that said three-dimensional presets defective.
Wherein cut sample for to carry out through presetting defective, the central plane that is preferably through presetting defective carries out.
It is to adopt digital Seiko lathe to form that defective is preset in said formation.
Said integrator again is to adopt the seccotine bonding, and pressurization is left standstill a period of time.
The present invention also aims to make and contain the marble sample that three-dimensional presets the simple check line, said method comprises:
Making does not contain the marble sample that three-dimensional presets the simple check line, and said marble specimen shape is a rectangular parallelepiped;
Along said sample being cut into two parts, and every part marked is convenient to later stage integrator again perpendicular to the long limit of marble;
Cut surface in every part adopts digital Seiko lathe to preset crackle to its inner formation respectively;
With the butt joint of all parts, move towards constant with what guarantee defective according to mark, adopt the seccotine bonding, pressurization is left standstill a period of time with all parts integrator again.
The length that presets crackle that wherein forms in every part is the half the of former crackle, and the inclination angle is identical with former crackle.
Said marble sample is of a size of 100mm * 100mm * 200mm, preset the simple check line and be of a size of 20mm * 8mm * 1.5mm, with the surface level inclination angle be 45 °, the flaw size that presets that every part forms is 10mm * 8mm * 1.5mm, with the surface level inclination angle be 45 °.
Effect of the present invention and advantage are:
1, can use the direct processing and fabricating of real heterogeneous body fragility medium, eliminate the influence that homogeneous simulation materials such as organic glass bring, make the experimental study better authenticity;
2, be convenient to three-dimensional size and the occurrence of presetting crack defect of accurately control, can be applicable to study the influence that the three-dimensional cracks defective ftractures to medium under the different shape;
3, manufacturing process is comparatively easy, is convenient to produce in batches.
Description of drawings
Accompanying drawing 1 presets crackle specimen size synoptic diagram for containing three-dimensional.
Accompanying drawing 2 presets crackle sample cutting planes synoptic diagram for containing three-dimensional.
Accompanying drawing 3 is made synoptic diagram for presetting crackle.
Accompanying drawing 4 is for presetting the crackle relative position figure that completes.
Embodiment
It is example that the present invention contains 3 D defects marble sample with making, and the production method that presets crackle is described.Wherein sample is of a size of 100mm * 100mm * 200mm, and presetting defect crack is the simple check line, is of a size of 20mm * 8mm * 1.5mm, is 45 ° with the inclination angle of surface level, and is as shown in Figure 1.
Step 1: make the marble sample;
Step 2: along perpendicular to long limit of marble and the plane 2 through crackle 1 center, the sample of making in the step 1 entirely is cut into two parts, as shown in Figure 2, and marked in case the later stage bonding;
Step 3: make respectively from cut surface 2 for two parts sample in the step 2 and to preset crackle, made crack size is 10mm * 8mm * 1.5mm, and promptly length is the half the of former crackle, and the inclination angle still is 45 °, and is as shown in Figure 3.Behind the crack position of having good positioning on the cut surface, adopt digital Seiko lathe to form crackle;
Step 4: according to before ready-made mark 3 two cut surfaces docks, with the assurance rock in genetic defects move towards constant, as shown in Figure 4.With the seccotine bonding of having surveyed intensity in advance, pressurization is left standstill a period of time between cut surface.Then contain the rock sample that three-dimensional presets the simple check line and complete, similar for the sample production mode that contains two crackles and multiple cracks.
Claims (10)
1. a making contains the method that three-dimensional presets the heterogeneous body fragility media samples of defective, and said method comprises:
Make and do not contain the heterogeneous body fragility media samples that three-dimensional presets defective;
Said sample is cut into two or more parts, and every part marked is convenient to later stage integrator again;
Cut surface in every part presets defective to its inner formation respectively;
With the butt joint of all parts, move towards constant according to mark with what guarantee defective, and with all parts integrator again.
2. the method for claim 1, said sample is rock, concrete or pottery.
3. method according to claim 1 or claim 2, the shape of said sample is a regular shape or irregularly shaped, preferred said specimen shape is a rectangular parallelepiped.
4. one kind as the described method of above-mentioned arbitrary claim, it is simple check line, two crackle or multiple cracks that said three-dimensional presets defective.
5. one kind as the described method of above-mentioned arbitrary claim are wherein cut sample for to carry out through presetting defective, and the central plane that is preferably through presetting defective carries out.
6. one kind as the described method of above-mentioned arbitrary claim, it is to adopt digital Seiko lathe to form that defective is preset in said formation.
7. one kind as the described method of above-mentioned arbitrary claim, said integrator again is to adopt the seccotine bonding, pressurization is left standstill a period of time.
8. a making contains the method that three-dimensional presets the marble sample of simple check line, and said method comprises:
Making does not contain the marble sample that three-dimensional presets the simple check line, and said marble specimen shape is a rectangular parallelepiped;
Along said sample being cut into two parts, and every part marked is convenient to later stage integrator again perpendicular to the long limit of marble;
Adopt digital Seiko lathe to form respectively at the cut surface of every part and preset crackle to inside;
With the butt joint of all parts, move towards constant with what guarantee defective according to mark, adopt the seccotine bonding, pressurization is left standstill a period of time with all parts integrator again.
9. method as claimed in claim 8, the length that presets crackle that wherein forms in every part are the half the of former crackle, and the inclination angle is identical with former crackle.
10. as above claim 8 or 9 described methods; Said marble sample is of a size of 100mm * 100mm * 200mm; Preset the simple check line and be of a size of 20mm * 8mm * 1.5mm, with the surface level inclination angle be 45 °, the flaw size that presets that every part forms is 10mm * 8mm * 1.5mm; With the surface level inclination angle be 45 °, the cutting sample for to carry out through the central plane that presets defective.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012102357334A CN102778371A (en) | 2012-07-06 | 2012-07-06 | Method for fabricating brittle medium test sample containing three-dimensional preset defect |
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| CN2012102357334A CN102778371A (en) | 2012-07-06 | 2012-07-06 | Method for fabricating brittle medium test sample containing three-dimensional preset defect |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106769340A (en) * | 2017-03-01 | 2017-05-31 | 河海大学 | The preparation method of rock sample inside precrack |
Citations (4)
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|---|---|---|---|---|
| US20020081015A1 (en) * | 2000-12-21 | 2002-06-27 | Jens Alkemper | 3D Material analysis |
| US20020102716A1 (en) * | 2001-02-01 | 2002-08-01 | Cleveland Patrick H. | Microarrayer |
| CN1803719A (en) * | 2006-01-10 | 2006-07-19 | 山东大学 | Ceramic test piece three-dimensional built-in crevice for fissured rock experiment |
| CN101892828A (en) * | 2010-05-25 | 2010-11-24 | 中国石油大学(北京) | Preparation method of anisotropic seepage medium with slits |
-
2012
- 2012-07-06 CN CN2012102357334A patent/CN102778371A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020081015A1 (en) * | 2000-12-21 | 2002-06-27 | Jens Alkemper | 3D Material analysis |
| US20020102716A1 (en) * | 2001-02-01 | 2002-08-01 | Cleveland Patrick H. | Microarrayer |
| CN1803719A (en) * | 2006-01-10 | 2006-07-19 | 山东大学 | Ceramic test piece three-dimensional built-in crevice for fissured rock experiment |
| CN101892828A (en) * | 2010-05-25 | 2010-11-24 | 中国石油大学(北京) | Preparation method of anisotropic seepage medium with slits |
Non-Patent Citations (1)
| Title |
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| 林鹏等: "含三维预置单裂纹缺陷岩石破坏试验研究", 《岩石力学与工程学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106769340A (en) * | 2017-03-01 | 2017-05-31 | 河海大学 | The preparation method of rock sample inside precrack |
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Application publication date: 20121114 |