WO2022116025A1 - Method for measuring transverse delamination strength of second-generation high-temperature superconducting tape, measurement data statistical analysis method, and device for testing delamination strength of two-generation high-temperature superconducting tape and welding fixture thereof - Google Patents
Method for measuring transverse delamination strength of second-generation high-temperature superconducting tape, measurement data statistical analysis method, and device for testing delamination strength of two-generation high-temperature superconducting tape and welding fixture thereof Download PDFInfo
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- WO2022116025A1 WO2022116025A1 PCT/CN2020/133226 CN2020133226W WO2022116025A1 WO 2022116025 A1 WO2022116025 A1 WO 2022116025A1 CN 2020133226 W CN2020133226 W CN 2020133226W WO 2022116025 A1 WO2022116025 A1 WO 2022116025A1
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- 238000012360 testing method Methods 0.000 title claims abstract description 66
- 230000032798 delamination Effects 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000003466 welding Methods 0.000 title claims abstract description 23
- 238000005259 measurement Methods 0.000 title description 3
- 238000007619 statistical method Methods 0.000 title description 3
- 230000009471 action Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 238000000691 measurement method Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 5
- 229910000679 solder Inorganic materials 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 238000004590 computer program Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005315 distribution function Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
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- 240000001624 Espostoa lanata Species 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012417 linear regression Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 229910021521 yttrium barium copper oxide Inorganic materials 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/04—Measuring adhesive force between materials, e.g. of sealing tape, of coating
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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
- G01N3/04—Chucks
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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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
Definitions
- the invention relates to the technical field of testing second-generation high-temperature superconducting tapes, in particular to a method for measuring the lateral delamination strength of second-generation high-temperature superconducting tapes, a statistical analysis method for measurement data, and a method for measuring the delamination strength of second-generation high-temperature superconducting tapes Test device and its welding fixture.
- the second-generation high-temperature superconducting tape has a special laminated structure.
- the thermal mismatch between the epoxy resin and the second-generation high-temperature superconducting tape and the electromagnetic force will cause transverse tensile stress, resulting in delamination behavior. Therefore, the delamination strength test of the second-generation high-temperature superconducting tape is particularly important.
- the testing methods for the transverse strength of YBCO superconducting tapes mainly include transverse anvil pull test, needle pull test, edge peeling test, side splitting test and transverse shear test. Among them, the anvil pull test is the closest to superconducting tape. Test method for the stress of materials in superconducting magnets. Because the brittleness measurement results of superconducting tape buffer layers and superconducting layers with ceramic materials often have a large degree of dispersion, the test results cannot be directly attributed to the magnet design.
- the main purpose of the present invention is to provide a method for measuring the lateral delamination strength of the second-generation high-temperature superconducting tape and a welding fixture for the second-generation high-temperature superconducting tape delamination strength test device, which can obtain the second-generation superconducting tape. Reliability under transverse tensile stress.
- a method for measuring the lateral delamination strength of a second-generation high-temperature superconducting tape includes: setting a testing device to perform a lateral delamination strength test on the second-generation high-temperature superconducting tape and obtaining a test result; The three-parameter Weibull distribution statistics are carried out on the test data results, and the proportional parameters, shape parameters and position parameters of the Weibull distribution of the delamination strength of the high-temperature superconducting tapes are obtained by fitting the least squares method according to the test results; according to the Weibull distribution reliability function and the described The scale parameter, the shape parameter and the position parameter obtain the reliability function under the action of the transverse tensile stress of the second-generation high temperature superconducting tape.
- the testing device includes: an upper anvil head, a lower anvil head, a lower anvil head fixing table, a lower loading disc, a screw rod, and a tie rod; wherein, the lower anvil fixing table is fixedly connected with the lower loading disc, The lower anvil head is fixed in the clamping groove of the lower anvil head fixing platform, and the upper anvil head is connected with the tie rod through the screw rod; the second-generation high-temperature superconducting tape includes an upper surface and a lower surface, Its upper surface is connected with the upper anvil head, and its lower surface is connected with the lower anvil head; keep the tie rod still, and the loading lower disc drives the lower anvil head fixing platform and the lower anvil head together Moving downward, the strip is subjected to transverse tensile stress, and the transverse delamination strength test of the second-generation high-temperature superconducting strip is carried out.
- the lower anvil head is step-shaped with a thin upper part and a thick lower part, and a clamping groove is correspondingly provided on the upper part of the lower anvil head fixing platform.
- the relative positions of the upper anvil head and the lower part of the tie rod are respectively provided with horizontal threaded holes, and the screw rods are matched with the horizontal threaded holes.
- a welding fixture for a second-generation high-temperature superconducting tape delamination strength test device which includes: an upper positioning plate, a lower bottom plate, and a top rod; wherein, the upper positioning plate Parallel to the lower bottom panel, the upper positioning plate has a sleeve, the sleeve is provided with a push rod, the sleeve is perpendicular to the upper positioning plate and the lower bottom panel;
- the mandrel only has the degree of freedom in the vertical direction; the mandrel is fixedly connected with the upper anvil head of the second-generation high temperature superconducting tape transverse delamination strength testing device.
- the testing device includes: an upper anvil head, a lower anvil head, a lower anvil head fixing table, a lower loading disc, a screw rod, and a tie rod; wherein, the lower anvil fixing table is fixedly connected with the lower loading disc, The lower anvil head is fixed in the clamping groove of the lower anvil head fixing platform, and the upper anvil head is connected with the tie rod through the screw rod; the second-generation high-temperature superconducting tape includes an upper surface and a lower surface, Its upper surface is connected with the upper anvil head, and its lower surface is connected with the lower anvil head; keep the tie rod still, and the loading lower disc drives the lower anvil head fixing platform and the lower anvil head together Moving downward, the strip is subjected to transverse tensile stress, and the transverse delamination strength test of the second-generation high-temperature superconducting strip is carried out.
- the lower anvil head is step-shaped with a thin upper part and a thick lower part, and a clamping groove is correspondingly provided on the upper part of the lower anvil head fixing platform.
- the relative positions of the upper anvil head and the lower part of the tie rod are respectively provided with horizontal threaded holes, and the screw rods are matched with the horizontal threaded holes.
- the lateral delamination strength test of the second-generation high-temperature superconducting tape in different temperature environments is realized, and through the three-parameter Weibull analysis, the effective statistics of the discrete delamination strength test results are realized, and the delamination strength is reliable.
- the degree function determines the probability of failure of the second-generation HTS tape under a given transverse tensile stress, enabling discrete delamination strength test results to provide a reference for the use of the tape and the engineering design of superconducting magnets.
- Fig. 1 is the flow chart of the measurement method of the lateral delamination strength of the second-generation high-temperature superconducting tape
- Figure 2 is a side view of the delamination test equipment
- Figure 3 is a front view of the delamination test equipment
- Figure 4 is a front view of a welding fixture for delamination testing
- Figure 5 is a side view of a welding fixture for delamination testing.
- a method for measuring the lateral delamination strength of a second-generation high-temperature superconducting tape includes the following steps:
- Step S102 setting a test device to test the lateral delamination strength of the second-generation high-temperature superconducting tape and obtain a test result.
- the test device includes: an upper anvil head 201, a lower anvil head 202, a lower anvil head fixing table 203, Load the lower disc 204, the screw 206, and the pull rod 205; wherein, the lower anvil fixing platform is fixedly connected with the loading lower disc, and the lower anvil is fixed in the slot of the lower anvil fixing platform, The upper anvil head is connected with the tie rod through the screw rod; the second-generation high-temperature superconducting tape 208 includes an upper surface and a lower surface, the upper surface of which is connected with the upper anvil head, and the lower surface is connected with the lower surface.
- the anvil head is connected; the tie rod is kept still, and the lower disc is loaded to drive the lower anvil head fixing platform and the lower anvil head to move downward together, and the strip is subjected to the effect of transverse tensile stress, which is very resistant to the second-generation high temperature ultra-high temperature. Conduction strips are tested for transverse delamination strength.
- the upper surface of the strip can be welded to the upper anvil, and the lower surface of the strip can be welded to the lower anvil.
- the anvil head is often skewed, which causes the second-generation high-temperature superconducting tape to be subjected to bending moment or even shear force during the peeling test, resulting in rollover, the anvil head falls off in advance, and the test result is small.
- a welding jig for testing the lateral delamination strength of the second-generation high-temperature superconducting tape is proposed, which welds the tape, the upper anvil head and the lower anvil head together.
- the welding fixture includes: an upper positioning plate 301, a lower bottom plate 302, and a top rod 303; wherein, the upper positioning plate is parallel to the lower bottom plate, and the upper positioning plate has a sleeve , a mandrel is arranged in the sleeve, and the sleeve is perpendicular to the upper positioning plate and the lower bottom panel; the mandrel in the sleeve only has the degree of freedom in the vertical direction;
- the upper anvil head of the second-generation high-temperature superconducting tape transverse delamination strength test device is fixedly connected.
- soldering When soldering, use lead-free solder with a melting point of 220°C to securely connect the test sample to the upper and lower anvils.
- the clamping and welding are carried out by the fixture to realize the vertical welding between the chuck and the strip.
- the welding fixture effectively avoids the influence of the collet skew on the delamination test during the welding process.
- the delamination test is carried out using a force-thermal-electric-magnetic multi-field coupling delamination strength test device.
- the specific steps of the welding process first, use sandpaper to polish the strip and the upper and lower anvils to remove the oxide layer to ensure the welding strength; then, clean the surface of the sample and the chuck, and then apply solder paste evenly on the surfaces of the upper and lower anvils , installed in the welding device and heated and welded on the heating table. When the solder is fully melted, the excess solder solution at the edges of the upper and lower chucks is carefully removed with cotton balls, so as to avoid test errors caused by excess solder; then, Stop heating and cool to room temperature in the air; finally, remove the fixture and take out the welded body.
- step S104 three-parameter Weibull distribution statistics are performed on the same set of test data results, and according to the test results, the proportional parameter, shape parameter and position parameter of the Weibull distribution of the delamination strength of the high-temperature superconducting tape are obtained by least squares fitting;
- Step S106 obtain the reliability function under the action of the transverse tensile stress of the second-generation high temperature superconducting tape according to the Weibull distribution reliability function and the proportional parameter, the shape parameter and the position parameter.
- F(x; ⁇ , ⁇ , ⁇ ) is the cumulative failure probability
- x is the independent variable
- ⁇ is the proportional parameter
- ⁇ is the shape parameter
- ⁇ is the position parameter
- the three parameters can be obtained by linear regression.
- the reliability function of Weibull distribution can be obtained as:
- n is the sample size, that is, the number of samples tested in a set of experiments
- i is taken from 1 to n
- x i is a set of delamination strengths obtained from the test.
- the reliability function of the delamination strength of the second-generation high-temperature superconducting tape can be obtained. Probability of failure of second-generation high-temperature superconducting tapes under transverse tensile stress.
- embodiments of the present invention may be provided as a method, system or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
- computer-usable storage media including, but not limited to, disk storage, CD-ROM, optical storage, etc.
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Abstract
A method for measuring the transverse delamination strength of a second-generation high-temperature superconducting tape and a welding fixture of a device for testing delamination strength of a two-generation high-temperature superconducting tape. The measurement method comprises: providing a test device to perform transverse delamination strength testing on a two-generation high-temperature superconducting tape and obtaining a test result (S102); performing three-parameter Weibull distribution statistics on a result of test data, and performing fitting by using a least squares method to obtain a scale parameter, a shape parameter, and a position parameter of Weibull distribution of the delamination strength of the two-generation high-temperature superconducting tape (S104); and obtaining a reliability function of the delamination strength of the two-generation high-temperature superconducting tape according to a Weibull distribution reliability function, the scale parameter, the shape parameter, and the position parameter (S106).
Description
本发明涉及二代高温超导带材测试技术领域，尤其涉及一种二代高温超导带材横向脱层强度测量方法、测量数据统计分析方法和用于二代高温超导带材脱层强度测试装置及其焊接夹具。The invention relates to the technical field of testing second-generation high-temperature superconducting tapes, in particular to a method for measuring the lateral delamination strength of second-generation high-temperature superconducting tapes, a statistical analysis method for measurement data, and a method for measuring the delamination strength of second-generation high-temperature superconducting tapes Test device and its welding fixture.
二代高温超导带材具有特殊的层合结构，在应用过程中，环氧树脂与二代高温超导带材之间的热失配以及电磁力会引起横向拉应力，导致分层行为，从而产生安全隐患，因此二代高温超导带材脱层强度测试尤为重要。目前YBCO超导带材横向强度的测试方法主要有横向砧拉测试、针拉测试、边缘剥皮测试、侧面劈裂测试和横向剪切测试等测试方法，其中，砧拉测试是最接近超导带材在超导磁体中的受力情况的测试方法。由于超导带材缓冲层和超导层具有陶瓷材料的脆性测定结果往往有较大程度的离散，导致测试结果无法直接由于磁体设计。The second-generation high-temperature superconducting tape has a special laminated structure. During the application process, the thermal mismatch between the epoxy resin and the second-generation high-temperature superconducting tape and the electromagnetic force will cause transverse tensile stress, resulting in delamination behavior. Therefore, the delamination strength test of the second-generation high-temperature superconducting tape is particularly important. At present, the testing methods for the transverse strength of YBCO superconducting tapes mainly include transverse anvil pull test, needle pull test, edge peeling test, side splitting test and transverse shear test. Among them, the anvil pull test is the closest to superconducting tape. Test method for the stress of materials in superconducting magnets. Because the brittleness measurement results of superconducting tape buffer layers and superconducting layers with ceramic materials often have a large degree of dispersion, the test results cannot be directly attributed to the magnet design.
发明内容SUMMARY OF THE INVENTION
本发明的主要目的在于提供一种二代高温超导带材横向脱层强度测量方法及用于二代高温超导带材脱层强度测试装置的焊接夹具，可得出二代超导带材横向拉应力作用下的可靠度。The main purpose of the present invention is to provide a method for measuring the lateral delamination strength of the second-generation high-temperature superconducting tape and a welding fixture for the second-generation high-temperature superconducting tape delamination strength test device, which can obtain the second-generation superconducting tape. Reliability under transverse tensile stress.
根据本发明的一个方面提出一种二代高温超导带材横向脱层强度测量方法，其包括：设置测试装置对二代高温超导带材进行横向脱层强度测试并得到测试结果；对同一组测试数据结果进行三参数Weibull分布统计，根据测试结果使用最小二乘法拟合得到高温超导带材脱层强度Weibull分布的比例参数、形状参数和位置参数；根据Weibull分布可靠度函数以及所述比例参 数、所述形状参数和所述位置参数得到二代高温超导带材的横向拉应力作用下的可靠度函数。According to one aspect of the present invention, a method for measuring the lateral delamination strength of a second-generation high-temperature superconducting tape is provided, which includes: setting a testing device to perform a lateral delamination strength test on the second-generation high-temperature superconducting tape and obtaining a test result; The three-parameter Weibull distribution statistics are carried out on the test data results, and the proportional parameters, shape parameters and position parameters of the Weibull distribution of the delamination strength of the high-temperature superconducting tapes are obtained by fitting the least squares method according to the test results; according to the Weibull distribution reliability function and the described The scale parameter, the shape parameter and the position parameter obtain the reliability function under the action of the transverse tensile stress of the second-generation high temperature superconducting tape.
其中，所述测试装置包括：上砧头、下砧头、下砧头固定台、加载下圆盘、螺杆、拉杆；其中，所述下砧头固定台与所述加载下圆盘固定连接，所述下砧头固定在所述下砧头固定台的卡槽中，所述上砧头通过所述螺杆与所述拉杆连接；所述二代高温超导带材包括上表面和下表面，其上表面与所述上砧头连接、其下表面与所述下砧头连接；保持所述拉杆不动，所述加载下圆盘带动所述下砧头固定台和所述下砧头一起向下移动，带材承受横向拉应力的作用，对二代高温超导带材进行横向脱层强度测试。Wherein, the testing device includes: an upper anvil head, a lower anvil head, a lower anvil head fixing table, a lower loading disc, a screw rod, and a tie rod; wherein, the lower anvil fixing table is fixedly connected with the lower loading disc, The lower anvil head is fixed in the clamping groove of the lower anvil head fixing platform, and the upper anvil head is connected with the tie rod through the screw rod; the second-generation high-temperature superconducting tape includes an upper surface and a lower surface, Its upper surface is connected with the upper anvil head, and its lower surface is connected with the lower anvil head; keep the tie rod still, and the loading lower disc drives the lower anvil head fixing platform and the lower anvil head together Moving downward, the strip is subjected to transverse tensile stress, and the transverse delamination strength test of the second-generation high-temperature superconducting strip is carried out.
其中，所述下砧头为上细下粗的台阶状，所述下砧头固定台上部相应设有卡槽。Wherein, the lower anvil head is step-shaped with a thin upper part and a thick lower part, and a clamping groove is correspondingly provided on the upper part of the lower anvil head fixing platform.
其中，所述上砧头和所述拉杆的下部相对位置分别设有水平螺纹孔，所述螺杆与所述水平螺纹孔相配设置。Wherein, the relative positions of the upper anvil head and the lower part of the tie rod are respectively provided with horizontal threaded holes, and the screw rods are matched with the horizontal threaded holes.
根据本发明的另一方面还提出一种用于二代高温超导带材脱层强度测试装置的焊接夹具，其包括：上定位板、下底面板，顶杆；其中，所述上定位板与所述下底面板平行，所述上定位板具有套管，所述套管内设置有顶杆，该套管垂直于上所述上定位板和所述下底面板；所述套管内的所述顶杆仅具有垂直方向的自由度；所述顶杆与二代高温超导带材横向脱层强度测试装置的上砧头固定连接。According to another aspect of the present invention, a welding fixture for a second-generation high-temperature superconducting tape delamination strength test device is also provided, which includes: an upper positioning plate, a lower bottom plate, and a top rod; wherein, the upper positioning plate Parallel to the lower bottom panel, the upper positioning plate has a sleeve, the sleeve is provided with a push rod, the sleeve is perpendicular to the upper positioning plate and the lower bottom panel; The mandrel only has the degree of freedom in the vertical direction; the mandrel is fixedly connected with the upper anvil head of the second-generation high temperature superconducting tape transverse delamination strength testing device.
其中，所述测试装置包括：上砧头、下砧头、下砧头固定台、加载下圆盘、螺杆、拉杆；其中，所述下砧头固定台与所述加载下圆盘固定连接，所述下砧头固定在所述下砧头固定台的卡槽中，所述上砧头通过所述螺杆与所述拉杆连接；所述二代高温超导带材包括上表面和下表面，其上表面与所述上砧头连接、其下表面与所述下砧头连接；保持所述拉杆不动，所述加载下圆盘带动所述下砧头固定台和所述下砧头一起向下移动，带材承受横向拉应力的作用，对二代高温超导带材进行横向脱层强度测试。Wherein, the testing device includes: an upper anvil head, a lower anvil head, a lower anvil head fixing table, a lower loading disc, a screw rod, and a tie rod; wherein, the lower anvil fixing table is fixedly connected with the lower loading disc, The lower anvil head is fixed in the clamping groove of the lower anvil head fixing platform, and the upper anvil head is connected with the tie rod through the screw rod; the second-generation high-temperature superconducting tape includes an upper surface and a lower surface, Its upper surface is connected with the upper anvil head, and its lower surface is connected with the lower anvil head; keep the tie rod still, and the loading lower disc drives the lower anvil head fixing platform and the lower anvil head together Moving downward, the strip is subjected to transverse tensile stress, and the transverse delamination strength test of the second-generation high-temperature superconducting strip is carried out.
其中，所述下砧头为上细下粗的台阶状，所述下砧头固定台上部相应设有卡槽。Wherein, the lower anvil head is step-shaped with a thin upper part and a thick lower part, and a clamping groove is correspondingly provided on the upper part of the lower anvil head fixing platform.
其中，所述上砧头和所述拉杆的下部相对位置分别设有水平螺纹孔，所述螺杆与所述水平螺纹孔相配设置。Wherein, the relative positions of the upper anvil head and the lower part of the tie rod are respectively provided with horizontal threaded holes, and the screw rods are matched with the horizontal threaded holes.
通过本发明实施例，实现了二代高温超导带材不同温度环境中横向脱层强度测试，通过三参数Weibull分析，实现了对离散的脱层强度测试结果进行有效统计，通过脱层强度可靠度函数确定在给定横向拉伸应力作用下二代高温超导带材发生破坏的概率，使离散的脱层强度测试结果为带材的使用和超导磁体的工程设计提供参考。Through the embodiment of the present invention, the lateral delamination strength test of the second-generation high-temperature superconducting tape in different temperature environments is realized, and through the three-parameter Weibull analysis, the effective statistics of the discrete delamination strength test results are realized, and the delamination strength is reliable. The degree function determines the probability of failure of the second-generation HTS tape under a given transverse tensile stress, enabling discrete delamination strength test results to provide a reference for the use of the tape and the engineering design of superconducting magnets.
此处所说明的附图用来提供对本发明的进一步理解，构成本申请的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:
图1是二代高温超导带材横向脱层强度测量方法的流程图；Fig. 1 is the flow chart of the measurement method of the lateral delamination strength of the second-generation high-temperature superconducting tape;
图2是脱层测试设备的侧视图；Figure 2 is a side view of the delamination test equipment;
图3是脱层测试设备的正视图；Figure 3 is a front view of the delamination test equipment;
图4是脱层测试的焊接夹具的正视图；Figure 4 is a front view of a welding fixture for delamination testing;
图5是脱层测试的焊接夹具的侧视图。Figure 5 is a side view of a welding fixture for delamination testing.
为使本发明的目的、技术方案和优点更加清楚，下面将结合本发明具体实施例及相应的附图对本发明技术方案进行清楚、完整地描述。显然，所描述的实施例仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
以下结合附图，详细说明本发明各实施例提供的技术方案。The technical solutions provided by the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
根据本发明实施例提供一种二代高温超导带材横向脱层强度测量方法，如图1所示，该方法包括以下步骤：According to an embodiment of the present invention, a method for measuring the lateral delamination strength of a second-generation high-temperature superconducting tape is provided. As shown in FIG. 1 , the method includes the following steps:
步骤S102，设置测试装置对二代高温超导带材进行横向脱层强度测试并得到测试结果。Step S102, setting a test device to test the lateral delamination strength of the second-generation high-temperature superconducting tape and obtain a test result.
首先提供一测试装置对二代高温超导带材进行横向脱层强度测试，参考图2和图3，所述测试装置包括：上砧头201、下砧头202、下砧头固定台203、加载下圆盘204、螺杆206、拉杆205；其中，所述下砧头固定台与所述加载下圆盘固定连接，所述下砧头固定在所述下砧头固定台的卡槽中，所述上砧头通过所述螺杆与所述拉杆连接；所述二代高温超导带材208包括上表面和下表面，其上表面与所述上砧头连接、其下表面与所述下砧头连接；保持所述拉杆不动，所述加载下圆盘带动所述下砧头固定台和所述下砧头一起向下移动，带材承受横向拉应力的作用，对二代高温超导带材进行横向脱层强度测试。First, a test device is provided to test the lateral delamination strength of the second-generation high-temperature superconducting tape. Referring to FIG. 2 and FIG. 3 , the test device includes: an upper anvil head 201, a lower anvil head 202, a lower anvil head fixing table 203, Load the lower disc 204, the screw 206, and the pull rod 205; wherein, the lower anvil fixing platform is fixedly connected with the loading lower disc, and the lower anvil is fixed in the slot of the lower anvil fixing platform, The upper anvil head is connected with the tie rod through the screw rod; the second-generation high-temperature superconducting tape 208 includes an upper surface and a lower surface, the upper surface of which is connected with the upper anvil head, and the lower surface is connected with the lower surface. The anvil head is connected; the tie rod is kept still, and the lower disc is loaded to drive the lower anvil head fixing platform and the lower anvil head to move downward together, and the strip is subjected to the effect of transverse tensile stress, which is very resistant to the second-generation high temperature ultra-high temperature. Conduction strips are tested for transverse delamination strength.
其中，可将带材的上表面与上砧头焊接、将带材的下表面与下砧头焊接。Wherein, the upper surface of the strip can be welded to the upper anvil, and the lower surface of the strip can be welded to the lower anvil.
在焊接过程中，砧头经常会发生歪斜，导致在剥离的测试过程中二代高温超导带材受到弯矩甚至剪切力的作用，导致侧翻，砧头提前脱落，测试结果偏小。为解决此问题，根据本发明实施例提出一种用于二代高温超导带材横向脱层强度测试的焊接夹具，将带材与上砧头和下砧头焊接在一起。During the welding process, the anvil head is often skewed, which causes the second-generation high-temperature superconducting tape to be subjected to bending moment or even shear force during the peeling test, resulting in rollover, the anvil head falls off in advance, and the test result is small. In order to solve this problem, according to an embodiment of the present invention, a welding jig for testing the lateral delamination strength of the second-generation high-temperature superconducting tape is proposed, which welds the tape, the upper anvil head and the lower anvil head together.
参考图4和图5，所述焊接夹具包括：上定位板301、下底面板302，顶杆303；其中，所述上定位板与所述下底面板平行，所述上定位板具有套管，所述套管内设置有顶杆，该套管垂直于上所述上定位板和所述下底面板；所述套管内的所述顶杆仅具有垂直方向的自由度；所述顶杆与二代高温超导带材横向脱层强度测试装置的上砧头固定连接。4 and 5, the welding fixture includes: an upper positioning plate 301, a lower bottom plate 302, and a top rod 303; wherein, the upper positioning plate is parallel to the lower bottom plate, and the upper positioning plate has a sleeve , a mandrel is arranged in the sleeve, and the sleeve is perpendicular to the upper positioning plate and the lower bottom panel; the mandrel in the sleeve only has the degree of freedom in the vertical direction; The upper anvil head of the second-generation high-temperature superconducting tape transverse delamination strength test device is fixedly connected.
焊接时选用熔点温度为220℃的无铅焊锡，固定连接测试样品与上、下砧头。实验样品与上下夹头在加热台上加热焊接过程中，通过夹具进行夹持焊接，以实现夹头与带材之间的垂直焊接。该焊接夹具有效地避免了由于焊接过程夹头歪斜对脱层测试的影响。焊接完成后使用力-热-电-磁多场耦合脱层强度测试装置进行脱层测试。所述焊接过程具体步骤：首先，使用砂纸打磨带材及上下砧头，去除氧化层，以确保焊接强度；接着，清洗样品及夹头表面，之后在上、下砧头表面均匀涂抹上焊膏，安装在焊接装置中之后在加热台上进行加热焊接，在焊锡充分熔化的同时采用棉球仔细处理掉上下夹头 边缘处多余的焊锡溶液，这样可以避免由于多余焊锡造成的测试误差；然后，停止加热，置于空气中冷却至室温；最后，拆除固定装置，取出焊接体。When soldering, use lead-free solder with a melting point of 220°C to securely connect the test sample to the upper and lower anvils. During the heating and welding process between the experimental sample and the upper and lower chucks on the heating table, the clamping and welding are carried out by the fixture to realize the vertical welding between the chuck and the strip. The welding fixture effectively avoids the influence of the collet skew on the delamination test during the welding process. After the welding is completed, the delamination test is carried out using a force-thermal-electric-magnetic multi-field coupling delamination strength test device. The specific steps of the welding process: first, use sandpaper to polish the strip and the upper and lower anvils to remove the oxide layer to ensure the welding strength; then, clean the surface of the sample and the chuck, and then apply solder paste evenly on the surfaces of the upper and lower anvils , installed in the welding device and heated and welded on the heating table. When the solder is fully melted, the excess solder solution at the edges of the upper and lower chucks is carefully removed with cotton balls, so as to avoid test errors caused by excess solder; then, Stop heating and cool to room temperature in the air; finally, remove the fixture and take out the welded body.
步骤S104，对同一组测试数据结果进行三参数Weibull分布统计，根据测试结果，使用最小二乘法拟合分别得到高温超导带材脱层强度Weibull分布的比例参数、形状参数和位置参数；In step S104, three-parameter Weibull distribution statistics are performed on the same set of test data results, and according to the test results, the proportional parameter, shape parameter and position parameter of the Weibull distribution of the delamination strength of the high-temperature superconducting tape are obtained by least squares fitting;
步骤S106，根据Weibull分布可靠度函数以及所述比例参数、所述形状参数和所述位置参数得到二代高温超导带材的横向拉应力作用下的可靠度函数。Step S106, obtain the reliability function under the action of the transverse tensile stress of the second-generation high temperature superconducting tape according to the Weibull distribution reliability function and the proportional parameter, the shape parameter and the position parameter.
对同一根二代高温超导带材进行多次测试，对多次测试结果进行Weibull统计分析，确定可靠度函数。The same second-generation high-temperature superconducting tape was tested multiple times, and Weibull statistical analysis was performed on the results of multiple tests to determine the reliability function.
三参数的Weibull分布函数如公式(1)所示：The three-parameter Weibull distribution function is shown in formula (1):
F(x；α,β,γ)＝1-exp{-[(x-γ)/α]
β} (1)
F(x; α, β, γ) = 1-exp{-[(x-γ)/α] β } (1)
其中F(x；α,β,γ)为累计失效概率，x为自变量，α为比例参数，β为形状参数，γ为位置参数，三个参数可通过线性回归得到。由公式(1)式可以得到Weibull分布可靠度函数为：Among them, F(x; α, β, γ) is the cumulative failure probability, x is the independent variable, α is the proportional parameter, β is the shape parameter, γ is the position parameter, and the three parameters can be obtained by linear regression. From formula (1), the reliability function of Weibull distribution can be obtained as:
R(x)＝exp{-[(x-γ)/α]
β} (2)
R(x)=exp{-[(x-γ)/α] β } (2)
将公式(1)转化为公式(3)：Convert formula (1) to formula (3):
exp{-[(x-γ)/α]
β}＝1-F(x；α,β,γ) (3)
exp{-[(x-γ)/α] β }=1-F(x;α,β,γ) (3)
对公式(3)两边取两次对数得到方程(4)：Taking the logarithm twice on both sides of equation (3) yields equation (4):
函数F(x
i；α,β,γ)根据实验数据由勒让德中位数得到：
The function F( xi ; α, β, γ) is obtained from the Legendre median according to the experimental data:
其中，n是样本容量，即一组实验测试的样品数量，i从1取到n，x
i是测试得到的一组脱层强度由小到大的排列。最后利用最小二乘法估计得到 Weibull分布函数的三个参数。
Among them, n is the sample size, that is, the number of samples tested in a set of experiments, i is taken from 1 to n, and x i is a set of delamination strengths obtained from the test. Finally, the three parameters of the Weibull distribution function are estimated by the least square method.
将拟合得到的三个参数带入Weibull分布可靠度函数公式(2)可以得到二代高温超导带材的脱层强度的可靠度函数，利用脱层强度的可靠度函数可以确定在给定横向拉伸应力作用下二代高温超导带材发生破坏的概率。Bringing the three parameters obtained by fitting into the Weibull distribution reliability function formula (2), the reliability function of the delamination strength of the second-generation high-temperature superconducting tape can be obtained. Probability of failure of second-generation high-temperature superconducting tapes under transverse tensile stress.
本领域技术人员应明白，本发明的实施例可提供为方法、系统或计算机程序产品。因此，本发明可采用完全硬件实施例、完全软件实施例或结合软件和硬件方面的实施例的形式。而且，本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
以上所述仅为本发明的实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的权利要求范围之内。The above description is only an embodiment of the present invention, and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.
Claims (8)
- 一种二代高温超导带材横向脱层强度测量方法，其特征在于，包括：A method for measuring the lateral delamination strength of a second-generation high-temperature superconducting tape, comprising:设置测试装置对二代高温超导带材进行横向脱层强度测试并得到测试结果；Set up a test device to test the lateral delamination strength of the second-generation high-temperature superconducting tape and obtain the test results;对同一组测试数据结果进行三参数Weibull分布统计，根据测试结果，使用最小二乘法拟合得到高温超导带材脱层强度Weibull分布的比例参数、形状参数和位置参数；The three-parameter Weibull distribution statistics are performed on the same set of test data results, and the proportional parameters, shape parameters and position parameters of the Weibull distribution of the delamination strength of high-temperature superconducting tapes are obtained by least squares fitting according to the test results;根据Weibull分布可靠度函数以及所述比例参数、所述形状参数和所述位置参数得到二代高温超导带材的横向拉应力作用下的可靠度函数。According to the Weibull distribution reliability function and the scale parameter, the shape parameter and the position parameter, the reliability function under the action of the transverse tensile stress of the second-generation high temperature superconducting tape is obtained.
- 根据权利要求1所述的方法，其特征在于，所述测试装置包括：上砧头、下砧头、下砧头固定台、加载下圆盘、螺杆、拉杆；其中，所述下砧头固定台与所述加载下圆盘固定连接，所述下砧头固定在所述下砧头固定台的卡槽中，所述上砧头通过所述螺杆与所述拉杆连接；所述高温超导带材包括上表面和下表面，其上表面与所述上砧头连接、其下表面与所述下砧头连接；保持所述拉杆不动，所述加载下圆盘带动所述下砧头固定台和所述下砧头一起向下移动，带材承受横向拉应力的作用，对二代高温超导带材进行横向脱层强度测试。The method according to claim 1, wherein the testing device comprises: an upper anvil head, a lower anvil head, a lower anvil head fixing platform, a lower loading disc, a screw rod, and a tie rod; wherein the lower anvil head is fixed The table is fixedly connected with the lower loading disc, the lower anvil is fixed in the clamping groove of the lower anvil fixing table, and the upper anvil is connected with the tie rod through the screw; the HTS The strip material includes an upper surface and a lower surface, the upper surface of which is connected with the upper anvil head, and the lower surface of which is connected with the lower anvil head; keep the tie rod still, and the loading lower disc drives the lower anvil head The fixed table and the lower anvil head move downward together, the strip is subjected to the effect of transverse tensile stress, and the transverse delamination strength test of the second-generation high-temperature superconducting strip is carried out.
- 根据权利要求2所述的方法，其特征在于，所述下砧头为上细下粗的台阶状，所述下砧头固定台上部相应设有卡槽。The method according to claim 2, wherein the lower anvil head is in a stepped shape with a thin upper part and a thick lower part, and a clamping groove is correspondingly provided on the upper part of the lower anvil head fixing platform.
- 根据权利要求2所述的方法，其特征在于，所述上砧头和所述拉杆的下部相对位置分别设有水平螺纹孔，所述螺杆与所述水平螺纹孔相配设置。The method according to claim 2, wherein the upper anvil head and the lower part of the tie rod are respectively provided with horizontal threaded holes in relative positions, and the screw rods are matched with the horizontal threaded holes.
- 一种用于二代高温超导带材脱层强度测试装置的焊接夹具，其特征在于，包括：上定位板、下底面板，顶杆；其中，所述上定位板与所述下底面板平行，所述上定位板具有套管，所述套管内设置有顶杆，该套管垂直于上所述上定位板和所述下底面板；所述套管内的所述顶杆仅具有垂直方向的 自由度；所述顶杆与二代高温超导带材横向脱层强度测试装置的上砧头固定连接。A welding fixture for a second-generation high-temperature superconducting tape delamination strength test device, characterized in that it includes: an upper positioning plate, a lower bottom plate, and a top rod; wherein, the upper positioning plate and the lower bottom plate are In parallel, the upper positioning plate has a sleeve, the sleeve is provided with a push rod, the sleeve is perpendicular to the upper positioning plate and the lower bottom plate; the push rod in the sleeve only has a vertical The degree of freedom of direction; the mandrel is fixedly connected with the upper anvil head of the second-generation high temperature superconducting tape transverse delamination strength testing device.
- 根据权利要求5所述的焊接夹具，其特征在于，所述测试装置包括：上砧头、下砧头、下砧头固定台、加载下圆盘、螺杆、拉杆；其中，所述下砧头固定台与所述加载下圆盘固定连接，所述下砧头固定在所述下砧头固定台的卡槽中，所述上砧头通过所述螺杆与所述拉杆连接；所述二代高温超导带材包括上表面和下表面，其上表面与所述上砧头连接、其下表面与所述下砧头连接；保持所述拉杆不动，所述加载下圆盘带动所述下砧头固定台和所述下砧头一起向下移动，带材承受横向拉应力的作用，对二代高温超导带材进行横向脱层强度测试。The welding jig according to claim 5, wherein the testing device comprises: an upper anvil head, a lower anvil head, a lower anvil head fixing table, a lower loading disc, a screw rod, and a tie rod; wherein, the lower anvil head The fixing table is fixedly connected with the lower loading disc, the lower anvil is fixed in the slot of the lower anvil fixing table, and the upper anvil is connected with the tie rod through the screw; the second generation The high-temperature superconducting tape includes an upper surface and a lower surface, the upper surface of which is connected with the upper anvil head, and the lower surface of which is connected with the lower anvil head; keeping the tie rod still, the loading lower disc drives the The lower anvil head fixing table and the lower anvil head move downward together, the strip is subjected to the action of transverse tensile stress, and the transverse delamination strength test of the second-generation high temperature superconducting strip is carried out.
- 根据权利要求6所述的焊接夹具，其特征在于，所述下砧头为上细下粗的台阶状，所述下砧头固定台上部相应设有卡槽。The welding jig according to claim 6, wherein the lower anvil head has a stepped shape with a thin upper part and a thick lower part, and a clamping groove is correspondingly provided on the upper part of the lower anvil head fixing platform.
- 根据权利要求6所述的焊接夹具，其特征在于，所述上砧头和所述拉杆的下部相对位置分别设有水平螺纹孔，所述螺杆与所述水平螺纹孔相配设置。The welding jig according to claim 6, wherein the upper anvil head and the lower part of the tie rod are respectively provided with horizontal threaded holes in relative positions, and the screw rods are matched with the horizontal threaded holes.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115406751A (en) * | 2022-10-31 | 2022-11-29 | 核工业西南物理研究院 | Welding type conduction experiment clamp for high-temperature superconducting cable and method thereof |
| CN115406751B (en) * | 2022-10-31 | 2023-02-03 | 核工业西南物理研究院 | Welding type conduction experiment fixture for high-temperature superconducting cable and method thereof |
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