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Overload tests of safety relevant components


Overloading can be simulated by a defined falling mass (impact) or by a defined static overload. What type we have to choose is depending from the concrete conditions. The tested component is allowed to yield under overload, but shall not show brittle fracture. A residual bearing capacity must be existing.

EFBe Overload tests are performed with defined loads and in combination with the respective maximum load test. Test loads are higher than the maximum loads. Short test descriptions can be found there.

EN standards on the contrary are working with impact tests:


Frame/fork unit
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  • Impact test / falling mass (EN): In this test according to EN 14764 (city/trekking bike), EN 14766 (MTB) or EN 14781 (racing bike) a weight is dropped onto the front axle of the upright frame–fork unit from a specified height.
  • Impact test / falling frame (EN): In this test according to EN 14766 (MTB) or EN 14781 (racing bike) a frame–fork unit loaded with weight is dropped with its front wheel axle onto an anvil from a specified position.

Fork
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  • Impact / dropping mass (EN): In this test according to EN 14764 (city/trekking bike), EN 14766 (MTB) or EN 14781 (racing bike) a weight is dropped onto the front axle of the horizontally clamped fork from a specified height.

Test order form fork

A limitation of plastic deformation, as required by the EN standards, is not appropriate for overload testing. On overload the component should, on the contrary, absorb as much of the impact energy as possible through plastic deformation, which also indicates to the user that an overload has occurred.

In addition, partly excessive energies are applied, which prevent a qualified lightweight design.