GB/T 5909-2021 PDF in English
GB/T 5909-2021 (GB/T5909-2021, GBT 5909-2021, GBT5909-2021)
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| GB/T 5909-2021 | English | 245 |
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Commercial vehicles -- Wheels -- Performance requirements and test methods for cornering and radial fatigue
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Standards related to: GB/T 5909-2021
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GB/T 5909-2021: PDF in English (GBT 5909-2021) GB/T 5909-2021
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.50
CCS T 22
Replacing GB/T 5909-2009
Commercial vehicles - Wheels - Performance
requirements and test methods for cornering and
radial fatigue
(ISO 3894:2015, Road vehicles - Wheels/rims for commercial vehicles -
Test methods, MOD)
ISSUED ON: OCTOBER 11, 2021
IMPLEMENTED ON: MAY 01, 2022
Issued by: State Administration for Market Regulation;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 6
2 Normative references ... 6
3 Terms and definitions ... 6
4 Test wheels ... 7
5 Performance requirements ... 7
5.1 Dynamic bending fatigue test performance requirements ... 7
5.2 Dynamic radial fatigue test performance requirements ... 7
6 Test methods ... 8
6.1 Dynamic bending fatigue test ... 8
6.2 Dynamic radial fatigue test ... 11
Annex A (informative) Structural changes of this Standard compared with ISO
3894:2015 ... 14
Bibliography ... 15
Commercial vehicles - Wheels - Performance
requirements and test methods for cornering and
radial fatigue
1 Scope
This Standard specifies the test wheels, performance requirements and test
methods for cornering and radial fatigue tests of commercial vehicle wheels.
This Standard is applicable to the wheels used for commercial vehicles and
trailers specified in GB/T 3730.1.
2 Normative references
The following referenced documents are indispensable for the application of
this document. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any
amendments) applies.
GB/T 2933, Wheels and rims for pneumatic tyres - Vocabulary, designation
and marking (GB/T 2933-2009, ISO 3911:2004, IDT)
GB/T 3730.1, Motor vehicles and trailers - Types - Terms and definitions
(GB/T 3730.1-2001, ISO/WD 3833:1999, MOD)
3 Terms and definitions
For the purposes of this document, the terms and definitions defined in GB/T
2933 and GB/T 3730.1 as well as the followings apply.
3.1 wheel-tire assembly
an assembly made up of wheels, tires and valves
3.2 crack
the material separation that occurred during the test expanded to 3mm and
above
where,
µ - The set friction coefficient between tire and road surface, see Table 1;
R - The tire static load radius is the maximum tire static radius specified by the
vehicle or wheel manufacturer to be used on the wheel, in meters (m);
d - The internal or external offset of the wheel (the internal offset is positive and
the external offset is negative), in meters (m); If the wheel uses both internal
offset and external offset, the internal offset is used;
Fv - The rated load on the wheels specified by the vehicle or wheel
manufacturer, in newtons (N);
S - The strengthening factor, see Table 1.
6.1.3 Test procedures
6.1.3.1 Refer to Figure 1 for a way to clamp the test wheel to the test equipment.
Tighten the wheel tightening bolts (or nuts) to the torque value specified by the
vehicle or wheel manufacturer. If it is not specified, it is recommended to tighten
it according to Table 3. When using the device in Figure 1a) or Figure 1b) to
test, check the amount of radial runout at the end of the lever arm. It shall not
exceed 0.3mm when empty.
6.1.3.2 Set test parameters such as bending moment, speed and number of
cycles. Start the test. In the initial stage of the test, the machine can be shut
down to tighten the bolts or nuts once again. If the bolt breaks during the test,
continue the test after replacing all the bolts.
6.1.3.3 Shut down after completing the specified number of test cycles. Use
penetrant testing or other acceptable methods to check for wheel cracks.
6.1.4 Failure criterion
In any of the following situations, the test is terminated and the wheel fails:
a) The test wheel cannot continue to bear the test load;
b) The original crack develops or stress causes new cracks to invade the
wheel section;
c) The offset increment of the loading point exceeds 15% of the initial offset
of the test.
6.2 Dynamic radial fatigue test
6.2.1 Test preparation
The test equipment shall have a driven drum and wheel mount to make the
wheel-tire assembly rotate under a fixed radial force, see Figure 2. The
minimum diameter of the drum is 1700mm. The width shall be wider than the
tire section. The surface shall be smooth. The connecting surface of the wheel
mount shall have the same assembly dimensional characteristics as the
connecting parts usually used on the vehicle. The surface hardness is
recommended to be HRC40~HRC50.
The loading system shall maintain the specified load. The deviation does not
exceed ±2.5% of the calculated value of the test load. The loading direction is
perpendicular to the surface of the drum. And it is consistent with the connection
direction between the center of the wheel mount and the center of the drum.
The axis of the drum and the axis of the wheel mount shall be parallel. The
wheels used as two wheels shall be tested in accordance with the wheels used
for single wheels.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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