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GB/T 5137.1-2002 English PDF (GBT5137.1-2002)

GB/T 5137.1-2002 English PDF (GBT5137.1-2002)

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GB/T 5137.1-2002: Test methods of safety glazing materials used on road vehicles -- Part 1: mechanical properties tests

This Part of GB/T 5137 specifies the test method for the mechanical properties of safety glass used for road vehicles.
GB/T 5137.1-2002
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
Replacing GB/T 5137.1-1996
Test methods of safety glazing materials used on
road vehicles ?€? Part 1. Mechanical properties tests
(ISO 3537.1999 Road vehicles - Safety glazing materials - Mechanical tests, MOD) ISSUED ON. DECEMBER 20, 2002
IMPLEMENTED ON. MAY 1, 2003
Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China(AQSIQ)
Table of Contents
Preface ... 3
1. Scope ... 5
2. Normative References ... 5
3. Test Conditions ... 5
4. Test Application Conditions ... 5
5. Ball-impact Test (227g Ball Test) ... 6
6. Resistance-to-penetration Test (2260g ball test) ... 7
7. Resistance-to-abrasion Test ... 8
8. Fragmentation Test ... 13
9. Head-form Test ... 14
Preface
GB/T 5137 ?€?Test Methods of Safety Glazing Materials Used on Road Vehicles?€? is divided into four parts.
-- Part 1. Mechanical Properties Tests;
-- Part 2. Optical Properties Tests;
-- Part 3. Radiation, High Temperature, Humidity, Fire and Simulated Weathering Resistance Tests;
-- Part 4. Method for the Determination of Solar Transmittance.
This is Part 1 of GB/T 5137.
This Part of GB/T 5137 modifies and adopts ISO 3537.1999 ?€?Road Vehicles - Safety Glazing Materials - Test Methods for Mechanical Properties?€? (English Version).
According to the actual situation of our country, differences between this Part and the international standard are as follows.
-- Quote the GB/T 531-1999 which is corresponding to ISO 7619.1986. The national standard adopts the test method of rubber pocket hardness meters to measure the hardness.
-- In impact resistance test, add the requirements on the precision of the balance to meet the test requirements of precision of peeling-off fragment mass weighed. -- Modify the provision of replacement frequency of the feel cap that is adopted in the head- form test stated in ISO 3537.1999. This is made according to the actual service conditions.
-- This Part does not specify the test method of plastic safety glazing material that is involved in ISO 3537.1999. It is because that, currently, there is no relevant automobile safety glass products in China.
This Part replaces GB/T 5137.1-1996 ?€?Road Vehicles - Safety Glazing Materials - Test Methods for Mechanical Properties?€?.
Compared with GB/T 5137.1-1996, the main changes are as follows.
-- Add the transition light source that is adopted in the resistance-to-abrasion test; and in the test result expression, the light source adopted is indicated.
-- Add the provisions on the replacement frequency of the feel caps.
Test methods of safety glazing materials used on road
vehicles ?€? Part 1. Mechanical properties tests
1. Scope
This Part of GB/T 5137 specifies the test method for the mechanical properties of safety glass used for road vehicles.
This Part is applicable for the road vehicle safety glass (hereinafter referred to as safety glass). The safety glass includes glass products processed from all kinds of glass or the combination of the glass and other materials, excluding plastic safety glass.
2. Normative References
The following normative documents contain the provisions which, through reference in this text, constitute the provisions of this Part. For dated reference, the subsequent amendments or revisions of these publications do not apply. However, the parties who reach an agreement based on this Part are encouraged to investigate the possibility of applying the latest editions of the standards indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 531-1999 Rubber - Determination of Indentation Hardness by Means of Pocket Hardness Meters (idt ISO 7619.1986)
3. Test Conditions
Except special regulations, the test shall be carried out under the following conditions. a) Environmental Temperature. 20??C??5??C;
b) Air Pressure. 8.60??104Pa ~ 1.06??105Pa;
c) Relative Humidity. 40% ~ 80%.
4. Test Application Conditions
According to test objectives, for some safety glass that can have the test result predicted from the known properties, not all tests shall be carried out.
2. lower frame;
3. rubber (3mm thick);
4. rubber pad (3mm thick, 15mm wide, hardness. A50)
5. specimens.
Figure 1 Specimens Carriage Used for Ball-impact Test
5.2.4 Balance
Precision. 0.05g.
5.3 Specimens
A square flat-pattern test pieces with the length of side of 300mm ???????????? mm. 5.4 Test Procedures
Specimens shall be kept in the stated temperature for at least 4h and then, the test shall be carried out immediately.
Specimens shall be put on the bracket that has met requirements in 5.2.3. The impact surface of specimens shall be vertical to the injection direction of the steel ball. The permissible deviation is within 3??. If necessary, specimens can be clamped to the specimen bracket to ensure during the test process, the migration distance of the specimens along any point of the bracket inside circumference does not exceed 2mm.
When the impact height is less than or equal to 6m, the impact point of the steel ball shall be located within 25mm to the center of specimens. Otherwise, the point shall be within 50mm to the center.
5.5 Result Expression
To appraise the destruction form and degree of the specimens. If the fragments and specimens are separated, the total mass of fragments from the opposite side of the impact surface and the mass of the largest fragments shall be weighed and accurate to 0.1g. 6. Resistance-to-penetration Test (2260g ball test)
6.1 Test Objectives
This test is to evaluate the penetration resistance properties of the safety glass. 6.2 Devices and Instruments
6.2.1 Hardened Steel Ball
Mass. 2260g??20g; Diameter. 82mm.
6.2.2 Device
Ball-injection devices that can make the steel ball free-fall from a specified height or that can make the steel ball generate a speed equivalent to that under the free-fall. During the application of the ball-injection device, the ultimate ball speed to that of the free-falling ball shall have the permissible deviation of ??1%.
6.2.3 Specimens Bracket
Its structure is the same as that in 5.2.3.
6.3 Specimens
A square flat-pattern test pieces with the length of side of 300mm ???????????? mm, or the test piece cut from the smoothest part of the windscreen product or other bending safety glass. When the windscreen product or other bending safety glass is used for the test, the contact between the safety glass and the specimen bracket shall be ensured favorable.
6.4 Test Procedures
Specimens shall be kept in the stated temperature for at least 4h and then, the test shall be carried out immediately.
Specimens shall be put on the bracket that has met requirements in 5.2.3. The impact surface of specimens shall be vertical to the injection direction of the steel ball. The permissible deviation is within 3??. If necessary, specimens can be clamped to the specimen bracket to ensure during the test process, the migration distance of the specimens along any point of the bracket inside circumference does no
t exceed 2mm. The impact point shall be located within 25mm to the center of the specimens. The surface of specimens undergoing the impact from the steel ball shall be the internal surface of the safety glass installed on the vehicle. Each specimen is only allowed to undergo the impact once.
6.5 Result Expression
Within 5s after the impact, if the steel ball has completely penetrated the specimen, the result shall be recorded as "penetrated"; if the steel ball is stall on the top of the specimen or the wedge is in the hole for 5s or longer, the result shall be records as "non-penetrated". 7. Resistance-to-abrasion Test
7.1 Test Objectives
It is to decide whether the safety glass has some lowest resistance to abrasion. Filament lamps with the filaments contained in the parallelepiped (1.5mm??1.5mm??3mm). The voltage exerted on the lamp end shall be able to make the color temperature as 2856K??50K. The voltage shall be stabilized within 1/1000. The instrument measuring the voltage shall have required precisions. When the A light source is adopted, a sunlight optical filter shall be added in the light beams so that the source can be converted into the C light source. 7.2.4 Optical System
It is made of lens for adjusting chromatism. The clear bore diameter of the lens shall not exceed 1/20 of the foci (f). To obtain equal light beams, the distance between the lens and the light source shall be adjusted. A diaphragm shall be inserted at the place 100mm??50mm to the lens far from the light source so that the beam light diameter can be controlled within 7mm??1mm.
7.2.5 Devices for Measuring Stray Lights
As shown in Figure 3, they are made of a photocell and a ??200mm-250mm integrating sphere. There shall be entrance and exi...

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