CN113146077A - Method for manufacturing rock-like transparent test piece with built-in plane crack of 3D laser inner carving - Google Patents
Method for manufacturing rock-like transparent test piece with built-in plane crack of 3D laser inner carving Download PDFInfo
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- CN113146077A CN113146077A CN202110326443.XA CN202110326443A CN113146077A CN 113146077 A CN113146077 A CN 113146077A CN 202110326443 A CN202110326443 A CN 202110326443A CN 113146077 A CN113146077 A CN 113146077A
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 239000011800 void material Substances 0.000 claims description 10
- 210000003934 vacuole Anatomy 0.000 claims description 9
- 239000011347 resin Substances 0.000 claims description 7
- 229920005989 resin Polymers 0.000 claims description 7
- 239000011521 glass Substances 0.000 claims description 3
- 239000011435 rock Substances 0.000 description 16
- 239000000463 material Substances 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 239000004570 mortar (masonry) Substances 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/50—Working by transmitting the laser beam through or within the workpiece
- B23K26/53—Working by transmitting the laser beam through or within the workpiece for modifying or reforming the material inside the workpiece, e.g. for producing break initiation cracks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
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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
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Abstract
The invention discloses a method for manufacturing a rock-like transparent test piece of a built-in plane crack of 3D laser inner carving, which comprises the steps of determining the three-dimensional size and the occurrence of the built-in plane crack to be carved, and establishing a three-dimensional digital space model of the built-in plane crack to be carved; converting coordinates of each point of a three-dimensional digital space model of the built-in plane fracture to be carved into relative coordinates relative to the coordinates of the reference point; and determining a filling scheme of the interference cavitation bubbles generated by laser interference on the crack cavity, and generating the interference cavitation bubbles with corresponding radiuses by the laser at the central point positions of the interference cavitation bubbles one by one according to the filling scheme to obtain the rock-like test piece containing the built-in plane cracks. The generation of the built-in plane crack is not influenced by the manufacturing process, and the built-in plane crack with any shape, size and production shape can be manufactured according to the program and the filling scheme.
Description
Technical Field
The invention belongs to the technical field of civil engineering, hydraulic and hydroelectric engineering and new energy engineering, and particularly relates to a method for manufacturing a rock-like transparent test piece with a built-in plane crack by 3D laser inner carving.
Background
The formation process of the rock is a long geological process, in the crystallization, deposition and deterioration processes of the rock, due to the action of geological structure movement, a large number of cracks which almost randomly appear are formed in the rock, and the existence of the cracks can reduce mechanical indexes of the rock, such as deformation modulus, strength, bearing capacity and the like, and threaten engineering safety, so that the research on the mechanical properties of rock materials containing cracks with different sizes and dimensions has important academic and engineering significance.
When the mechanical properties of fractured rocks are researched, laboratory tests are a common method because test pieces are small in size and high in precision, and test instruments are precise. However, because the technical difficulty of collecting natural rock samples containing fractures is high, the indoor test is mostly carried out by adopting similar materials for artificially preparing fractures.
At present, the main methods for manually manufacturing similar test pieces of rocks containing cracks comprise: (1) mortar, resin and the like are used as rock matrix materials, and a fracture cavity is formed in a cutting mode; (2) using mortar, resin and other materials as rock matrix materials, simulating cracks by inserting the inserts, and removing the inserts after the mortar is solidified to form crack cavities, such as the manufacturing method of application number 201810980736.8; (3) the method is characterized in that a 3D printing technology is used, brittle resin is used as a rock matrix material, and in the printing process, a gap is reserved at a crack part and is not printed, so that a crack cavity is formed, and the preparation method is the preparation method of application numbers 201810055763.4, 201910917145.0 and 201910416798.0.
Due to process limitation, the cutting method of the methods (1) and (2) is difficult to realize crack surface generation in any shape and process built-in plane cracks; the method (3) can print the cracks with any shape, shape and position, is one of three methods for manually manufacturing similar test pieces of the rocks containing the cracks, has better application prospect, and has the defect that the cracks and rock matrixes are generated simultaneously and do not completely accord with the assumption that the cracks are formed under the action of external force after the homogeneous matrixes are formed in the rock generation process.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method for manufacturing a rock-like transparent test piece with a built-in plane crack based on 3D laser inner carving.
The above object of the present invention is achieved by the following technical solutions:
the method for manufacturing the rock-like transparent test piece with the built-in plane fracture based on the 3D laser inner carving comprises the following steps:
step 1: determining the three-dimensional size and the occurrence of the built-in plane fracture to be carved, and establishing a three-dimensional digital space model of the built-in plane fracture to be carved in a computer;
step 2: selecting a rock-like test piece, determining a reference point coordinate, and converting each point coordinate of a three-dimensional digital space model of a built-in plane crack to be carved into a relative coordinate relative to the reference point coordinate;
and step 3: in a computer, determining a filling scheme of interference cavities generated by laser interference on a crack cavity according to a three-dimensional digital space model of a built-in plane crack to be carved, wherein the filling scheme comprises the central point position of each interference cavity for filling the crack cavity and the radius of the interference cavity;
and 4, step 4: placing the rock-like test piece into a laser inner carving machine, enabling the laser to generate interference vacuoles with corresponding radiuses at the central point position of the interference vacuoles one by one according to a filling scheme, and enabling a formed gap area to be a built-in plane crack to be carved after all the interference vacuoles are generated;
and 5: and after the rock-like test piece is cooled, taking out the rock-like test piece from the laser inner engraving machine to obtain the rock-like test piece containing the built-in plane cracks.
The rock-like test piece is unsaturated resin or organic glass.
The outer surface area of the void region formed by each interference void as described above is the same as the outer surface area of the built-in planar crevice to be engraved, or the volume of the void region formed by each interference void is the same as the volume of the built-in planar crevice to be engraved.
The above-described behavior includes strike, dip and dip, and the strike, dip and dip of the void region formed by each interference void is the same as the strike, dip and dip of the built-in planar crevice to be sculpted.
Compared with the prior art, the invention has the following advantages:
(1) providing a new method for manufacturing a transparent rock-like similar test piece capable of generating a built-in plane crack;
(2) the generation of the built-in cracks is not influenced by the manufacturing process, built-in cracks with any shape, size and shape can be manufactured according to the program and the filling scheme, and the method is particularly suitable for artificially generated plane cracks.
Drawings
FIG. 1 is a flow chart of the method of the present invention;
FIG. 2 is a schematic diagram of the structure of a single interference cavity;
FIG. 3 is a side view of a built-in planar fracture to be made in a transparent rock-like test piece;
FIG. 4 is a side view of a filling of a built-in planar fracture with a plurality of interference cavities;
FIG. 5 is a top view of a filling of a built-in planar fracture with a plurality of interference cavities;
FIG. 6 is an isometric view of a resulting transparent rock-like test piece with built-in planar fractures;
FIG. 7 is a side view of a resulting transparent rock-like test piece with built-in planar fractures;
FIG. 8 is a top view of the resulting transparent rock-like test piece with built-in planar fractures;
FIG. 9 is an elevation view of a resulting transparent rock-like test piece with built-in planar fractures;
wherein, 1-center point of interference cavity; 2-interference cavity boundary formed by laser interference; 3-radius of interference cavity; 11-built-in planar fractures to be generated; 12-length of built-in planar fracture to be generated; 13-height of built-in planar fractures to be generated; 14-width of built-in planar fracture to be generated; 100-class rock test piece.
Detailed Description
The present invention will be described in further detail with reference to examples for the purpose of facilitating understanding and practice of the invention by those of ordinary skill in the art, and it is to be understood that the present invention has been described in the illustrative embodiments and is not to be construed as limited thereto.
Example 1
Referring to fig. 1-5, a method for manufacturing a rock-like transparent test piece with a built-in plane crack based on 3D laser inner carving comprises the following steps:
step 1: determining the three-dimensional size and the occurrence of the built-in plane fracture to be carved, wherein the occurrence comprises the trend, the inclination angle and the inclination, establishing a three-dimensional digital space model of the built-in plane fracture to be carved in a computer, and the trend, the trend and the inclination angle of a gap area formed by each interference cavity are the same as those of the built-in plane fracture to be carved;
the built-in plane slit of a rectangle as shown in fig. 3 is to be engraved, the length of the built-in plane slit is about 0.6mm, the height of the built-in plane slit is about 0.1mm, the width of the built-in plane slit is about 0.25mm, and the inclination angle of the built-in plane slit is 0 °.
Step 2: selecting a rock-like test piece which is unsaturated resin or organic glass, determining the coordinates of the datum point, converting the coordinates of each point of the three-dimensional digital space model of the built-in plane fracture to be carved into relative coordinates relative to the coordinates of the datum point,
in the embodiment, the rock-like test piece is made of unsaturated resin, the size of the rock-like test piece is phi 5mm multiplied by 10mm, and the built-in plane crack is located at the center of the rock-like test piece.
And step 3: in a computer, determining a filling scheme of interference cavities generated by laser interference on a crack cavity according to a three-dimensional digital space model of a built-in plane crack to be carved, wherein the filling scheme comprises the central point position of each interference cavity for filling the crack cavity and the radius of the interference cavity; the outer surface area of a gap region formed by each interference cavity is the same as that of the built-in plane crack to be carved, or the volume of the gap region formed by each interference cavity is the same as that of the built-in plane crack to be carved;
in the present embodiment, after the computer program optimization calculation, according to the equivalence principle that the outer surface area of the void region formed by each interference cavity is the same as the outer surface area of the built-in planar crevice to be engraved, 4 × 11 interference cavities with a radius of about 0.0567mm are used to fill the built-in planar crevice, and the outer surface area of the void region formed by each interference cavity is the same as the outer surface area of the built-in planar crevice to be engraved, as shown in fig. 4 and 5.
And 4, step 4: placing the rock-like test piece into a laser inner carving machine, enabling the laser to generate interference vacuoles with corresponding radiuses at the central point position of the interference vacuoles one by one according to a filling scheme, and enabling a formed gap area to be a built-in plane crack to be carved after all the interference vacuoles are generated;
and 5: and after the rock-like test piece is cooled, taking out the rock-like test piece from the laser inner engraving machine to obtain the rock-like test piece containing the built-in plane cracks.
Example 2:
as shown in fig. 6 to 9, the rock-like test piece was a cylindrical transparent sample having a size of Φ 5mm × 8mm, the built-in plane cracks were 4mm × 4mm × 0.1mm, the rectangular built-in plane cracks had an inclination angle of 30 °, the number of interference cavities was 41 × 41 × 1 in rows and columns, the number of interference cavities was 41 × 41 × 1 — 1681, and the radius of each interference cavity was 0.0567 mm. The rest is the same as in example 1. The resulting rock test piece 100 to be tested, containing the in-plane fissures, is shown in FIG. 6 in an isometric view, FIG. 7 in a side view, FIG. 8 in a top view, and FIG. 9 in a front view.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (4)
- The method for manufacturing the rock-like transparent test piece with the built-in plane cracks of the 3D laser inner carving is characterized by comprising the following steps of:step 1: determining the three-dimensional size and the occurrence of the built-in plane fracture to be carved, and establishing a three-dimensional digital space model of the built-in plane fracture to be carved in a computer;step 2: selecting a rock-like test piece, determining a reference point coordinate, and converting each point coordinate of a three-dimensional digital space model of a built-in plane crack to be carved into a relative coordinate relative to the reference point coordinate;and step 3: in a computer, determining a filling scheme of interference cavities generated by laser interference on a crack cavity according to a three-dimensional digital space model of a built-in plane crack to be engraved, wherein the filling scheme comprises radius values of the interference cavities filling the crack cavity, a spatial arrangement scheme and a central point position corresponding to the arrangement scheme;and 4, step 4: placing the rock-like test piece into a laser inner carving machine, enabling the laser to generate interference vacuoles with corresponding radiuses at the central point position of the interference vacuoles one by one according to a filling scheme, and enabling a formed gap area to be a built-in plane crack to be carved after all the interference vacuoles are generated;and 5: and after the rock-like test piece is cooled, taking out the rock-like test piece from the laser inner engraving machine to obtain the rock-like test piece containing the built-in plane cracks.
- 2. The method for manufacturing the rock-like transparent test piece with the built-in plane crack of the 3D laser inner carving is characterized in that the rock-like test piece is made of unsaturated resin or organic glass.
- 3. The method for preparing a rock-like transparent specimen with a built-in planar fissure of 3D laser inner carving as claimed in claim 1, characterized in that the outer surface area of the void region formed by each interference cavity is the same as the outer surface area of the built-in planar fissure to be carved, or the volume of the void region formed by each interference cavity is the same as the volume of the built-in planar fissure to be carved.
- 4. The method for manufacturing the rock-like transparent test piece with the built-in plane crack of the 3D laser inner carving is characterized in that the production state comprises the trend, the inclination angle and the inclination, and the trend, the inclination angle and the inclination of a gap area formed by each interference cavity are the same as those of the built-in plane crack to be carved.
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| CN202110326443.XA CN113146077A (en) | 2021-03-26 | 2021-03-26 | Method for manufacturing rock-like transparent test piece with built-in plane crack of 3D laser inner carving |
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| CN202110326443.XA CN113146077A (en) | 2021-03-26 | 2021-03-26 | Method for manufacturing rock-like transparent test piece with built-in plane crack of 3D laser inner carving |
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| CN104134002A (en) * | 2014-07-30 | 2014-11-05 | 中国石油天然气集团公司 | Clastic rock reservoir modeling method and device based on a digital geological outcrop |
| CN105758875A (en) * | 2016-03-15 | 2016-07-13 | 山东大学 | Visual simulation method of fracturing rock |
| CN107328625A (en) * | 2017-07-31 | 2017-11-07 | 水利部交通运输部国家能源局南京水利科学研究院 | The method of crackle is close in a kind of simulation rock interior three-dimensional closing |
| US20200408656A1 (en) * | 2018-06-13 | 2020-12-31 | Shandong University Of Science And Technology | System and method for monitoring crack propagation of transparent rock specimen |
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- 2021-03-26 CN CN202110326443.XA patent/CN113146077A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101726556A (en) * | 2008-10-24 | 2010-06-09 | 中国石油化工股份有限公司 | Device and method for analyzing hydrocarbon component of monomer oil gas inclusion |
| CN103773056A (en) * | 2014-01-24 | 2014-05-07 | 山东大学 | Preparation method of high-brittleness transparent rock material test piece |
| CN104134002A (en) * | 2014-07-30 | 2014-11-05 | 中国石油天然气集团公司 | Clastic rock reservoir modeling method and device based on a digital geological outcrop |
| CN105758875A (en) * | 2016-03-15 | 2016-07-13 | 山东大学 | Visual simulation method of fracturing rock |
| CN107328625A (en) * | 2017-07-31 | 2017-11-07 | 水利部交通运输部国家能源局南京水利科学研究院 | The method of crackle is close in a kind of simulation rock interior three-dimensional closing |
| US20200408656A1 (en) * | 2018-06-13 | 2020-12-31 | Shandong University Of Science And Technology | System and method for monitoring crack propagation of transparent rock specimen |
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