BS ISO 3894:2015 pdf free.Road vehicles一Wheels/rims for commercial vehicles一Test methods.
BS ISO 3894 specifies two laboratory methods for testing certain essential strength characteristics of disc wheels intended for road use on commercial vehicles, buses, trailers, and multipurpose passenger vehicles, as defined in ISO 3833.
The test methods are
— dynamic cornering fatigue test and
— dynamic radial fatigue test.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 3833, Road vehicles — Types — Terms and definitions
ISO 3911, Wheels and rims for pneumatic tyres — Vocabulary, designation and marking
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 3911 and the following apply.
3.1 test bolt (fasteners) test bolt is a bolt that is attached to the hub/test fixture before mounting the wheel
3.2 wheel nut (fasteners) nut for fastening the wheel as a set with the test bolts (fasteners) (3d)
3.3 load rating value obtained by converting the force to mass which can be loaded under defined conditions to the tyres which can be applied to the test wheel
3.4 maximum vertical static load maximum value of the vertical load acting on the tyres
Note 1 to entry: It is specified by the wheel manufacturer or the vehicle manufacturer and it derives from the specifications of a vehicle which is intended to use the test wheel.
3.5 crack material separation with a propagation of more than 10 mm occurring during a test
4 General requirement
Only fully processed new wheels which are equivalent of wheels intended for the vehicle shall be used
for the tests.
5 Wheels — Dynamic cornering fatigue test
5.1 Equipment
The test machine shall have a driven rotatable device whereby either the wheel rotates under the influence of a stationary bending moment (see Figure 1) or the wheel is stationary and is subjected to a rotating bending moment (see Figure2).
5.2 Procedure
5.2.1 PreparatIon
Clamp the rim of the wheel securely to the test fixture. The adaptor face of the test machine shall have equivalent mounting systems to those used on the vehicle. The mating surface of the test adaptor and wheel shall be free of excessive scoring and deformation, and excessive build-up of paint. dirt, or foreign matter.
Attach the load arm and adaptor assembly to the mounting surface of the wheel using test bolts and wheel nuts. The test bolt and wheel nuts used shall be
— equivalent to those used in a vehicle,
— in good condition, and
— lubricated or non-lubricated in accordance with the state of being applied to a vehicle (as specified by the vehicle manufacturer).
Tighten these wheel nuts at the beginning of the test to the vehicle or wheel manufacturer’s specified torque values.
Wheel bolts or nuts can be retightened during the test.
5.2.2 Bending moment application
To impart a bending moment to the wheel, apply a force, F, parallel to the plane of the wheel mounting surface at a specified distance, I (moment arm), as shown in Figures 1 and 2.
Maintain the bending moment within ±2,5 % of the calculated value.BS ISO 3894 pdf download.
Tags: Road vehicles
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