Abstract
This study was focused on a metallic part from a dynamic seal of an ultra-high pressure intensifier. This part developed cracks originated at pressure relieving slots. Cracks were analyzed to get information about their origin and propagation mechanisms Simulations were performed to derive stress and strain state near the initiation region. It was concluded that cracks were initiated and propagated under mode II loading. Therefore, a model has been proposed to relate the tribological properties of the material and the crack plane orientation. Finally, a new slot was designed to delay crack initiation at this part.
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