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GB/T 37788-2019: Test method for elastic moduli of ultra-thin glass
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 37788-2019 | English | 119 |
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Test method for elastic moduli of ultra-thin glass
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GB/T 37788-2019
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Basic data | Standard ID | GB/T 37788-2019 (GB/T37788-2019) | | Description (Translated English) | Test method for elastic moduli of ultra-thin glass | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | Q30 | | Classification of International Standard | 81.040.10 | | Word Count Estimation | 6,665 | | Date of Issue | 2019-08-30 | | Date of Implementation | 2020-07-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 37788-2019: Test method for elastic moduli of ultra-thin glass---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Test method for elastic moduli of ultra-thin glass
ICS 81.040.10
Q30
National Standards of People's Republic of China
Test method for elastic modulus of ultra-thin glass
2019-08-30 released
2020-07-01 implementation
State Administration for Market Regulation
Issued by China National Standardization Administration
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by the China Building Materials Federation.
This standard is under the jurisdiction of the National Industrial Glass and Special Glass Standardization Technical Committee (SAC/TC447).
Drafting organizations of this standard. China Building Materials Inspection and Certification Group Co., Ltd., China Building Materials Research Institute Co., Ltd., Li
Ling Qibin Electronic Glass Co., Ltd., Quality and Technical Supervision Standards and Coding Office of Shunde District, Foshan City, Jiangsu Tiemao Glass Co., Ltd., Shanghai
Haishi Metrology and Testing Technology Research Institute.
The main drafters of this standard. Liu Xiaogen, Bao Yiwang, Wan Detian, Liu Songhua, Wang Yinmao, Cai Xiaoyu, Qiu Yan, Tu Hao, Zhou Dao, Tian Yuan, Sun Yukang,
Liu Bohui, Pan Ruina, Ma Delong, Wang Yanping, Ai Fuqiang.
Test method for elastic modulus of ultra-thin glass
1 Scope
This standard specifies the terms and definitions, test principles, test equipment, specimens, and test methods for measuring the elastic modulus of ultra-thin glass using the cantilever beam vibration method.
Test, result calculation and test report.
This standard is applicable to the elastic modulus test of glass with a thickness of 0.1mm~1.1mm.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article
Pieces. For undated references, the latest version (including all amendments) applies to this document.
GB/T 1216 outside micrometer
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Ultra-thin glass cantilever
One end is an ultra-thin glass beam that is fixed on a support and does not produce axial or left-right displacement and rotation, and the other end is a free end.
3.2
Vibration frequency of cantilever beam
The number of vibrations of the cantilever beam per unit time.
4 Test principle
The natural frequency of the cantilever beam under free vibration is determined by the sample size, elastic modulus and mass. Prepare ultra-thin glass into a cantilever beam,
And measure the first-order natural frequency and the size and mass of the cantilever beam under the lateral free vibration, and obtain the ultra-thin glass according to the given calculation formula
Elastic Modulus.
5 Test device
5.1 Specimen supporting device
The sample support base should be composed of a metal block with a certain mass, and the total mass should be greater than 1000g.
5.2 Vibration test system
The vibration test system consists of sensors, signal acquisition amplifiers and data analysis systems. The sensor should choose non-contact laser sensor
Or other photoelectric sensors that can measure glass vibration, the frequency measurement range is 1Hz~4kHz, the length measurement range is not less than 10mm,
The working distance is 20mm~500mm, and the sensor should be fixed on a height-adjustable support base. Signal acquisition and amplifier including signal modulation
Controller, A/D converter, frequency accurate to 0.1%.
The sensor support base should be placed on a flat and stable test bench. Figure 1 is a basic schematic diagram of the test device.
6 Sample
6.1 Cut the ultra-thin glass into a beam with a length of 150mm±1mm and a width of 10mm±0.5mm. The type diagram of ultra-thin glass sample is shown in Figure 2.
6.2 The cutting edge of the sample does not need to be chamfered, but the cutting edge should be finely ground, and the cutting edge should have no visible cracks, chipped edges and missing corners.
6.3 The surface of the sample is required to be flat, without visible scratches and damages.
6.4 No less than 10 samples should be prepared.
7 Test
7.1 Sample size measurement
Use a vernier caliper that meets the requirements of GB/T 1216 to measure the sample size. Length and width measurement are accurate to 0.1mm, thickness measurement is accurate
Accurate to 0.02mm. When measuring the length, measure the positions close to the two long sides, and take the average value as the final result value. Thickness measurement
When, choose to measure at the two ends and the middle of the beam, and take the average value as the final result value. When measuring the thickness, select the
Measure the two ends and the middle, and take the average value as the final result value.
7.2 Sample quality measurement
The mass of the sample is measured with a balance, accurate to 0.001g.
7.3 Cantilever beam production
Use 502 glue or other high-strength instant-drying liquid adhesive to bond the sample firmly to the base bearing. After the bond is solidified, remove the overflow in the bond
Noodle bonding agent. The sample bonding length l is 30mm±1mm, and the sample should be perpendicular to the horizontal plane after the bonding is solidified.
7.4 Cantilever length measurement
Measure the length of the two sides of the cantilever with a vernier caliper, and take the average value as the final result value, accurate to 0.1mm.
7.5 First-order vibration frequency measurement of cantilever beam
Start the detection device, set the basic parameters of the equipment, adjust the signal receiving sensor, and make the irradiating laser irradiate the surface of the cantilever beam. Correct
The free end of the cantilever beam exerts a certain force to cause the free end of the cantilever beam to deform 5mm~10mm and then release it quickly. At this time, the cantilever beam produces
Free lateral vibration. Use the signal receiving and processor to obtain the lateral free vibration curve, and calculate the first order of the cantilever through the data processing system
Natural frequency of vibration. Each sample should measure 3 times of vibration frequency, and take the average value as the final result value.
8 Result calculation
The elastic modulus of ultra-thin glass is calculated according to formula (1).
9 Test report
The test report should include at least the following.
a) Entrusting unit;
b) Sample name, specification and number;
c) The model of the instrument used;
d) Implementation standard number;
f) Test unit and test personnel;
g) test date;
h) Other relevant information.
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