Elements with variable stiffness controlled by negative pressure

摘要

An element (1) having a variable stiffness controlled by negative pressure, comprising: an airtight envelope (10); 41) and a plurality of flexible layers (30, 30a, 30b, 30c, 30d, 30e) in the envelope, having a second surface (32, 42), and adapted to vent the interior of the envelope In the element (1) comprising: • the first and second faces (31, 41, 32, 42) of two adjacent layers are higher than 0.5 between each other Has a coefficient of friction, the first and second faces (31, 41, 32, 42) of two adjacent layers have a normal force below 0.07 N / mm 2 per unit area to separate them Are necessary and / or separated in the normal direction It is characterized by having adhesive properties such that the energy per unit area required for this is less than 6.7 J / m 2. [Selection] Figure 7