Wheels are critical safety-relevant components of the vehicle which are exposed to severe loads over the lifetime. Their reliability can only be safeguarded by performing tests under laboratory conditions which resemble actual loading conditions as closely as possible.
The Biaxial Wheel Test (ZWARP) developed by Instron includes an additional hydraulic actuator which allows a controlled and highly accurate adjustment of the angle of attack to produce high lateral forces. It is also distinguished by its compact design, high robustness, and extremely high reproduction quality.
By using this so-called “Hayes Lemmerz” method, the ZWARP’s control parameter could be determined directly from the wheel forces without the need for the long detour of strain gauge measurement.
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