HIGH-CYCLE FATIGUE DEVICE FOR LOW STIFFNESS COMPONENTS

Olivier Arnould (1) , François Hild (1)

1 LMT - Laboratoire de Mécanique et Technologie

The long-term reliability of small electroplated bellows made of a thin Ni/Cu/Ni layered material is sought. The design criteria are related to their stiffness and airtightness as they are used to convert a (very) small pressure variation into a displacement in a high-precision pressure sensor. Yet, in the above-mentioned cases, the airtightness cannot be assessed easily. It is proposed to develop a special setup to directly test bellows in their ‘‘environment'' (i.e., they are welded onto A304L(N) stainless steel holders). Furthermore, as high-cycle fatigue behavior is sought, that is, at least 1–10 million cycles are necessary to obtain the endurance properties, up to 10 samples may be tested simultaneously to save time.

Domaines: Mécanique des matériaux [physics.class-ph]; Mécanique des matériaux [physics.class-ph]

Olivier Arnould, François Hild. HIGH-CYCLE FATIGUE DEVICE FOR LOW STIFFNESS COMPONENTS. Experimental Techniques, 2008, 32 (5), pp.17-25. ⟨10.1111/j.1747-1567.2007.00292.x⟩. ⟨hal-00199384⟩