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3. Plastic deformation modes and contact conditions
3.1 State of stress and deformation of a metal sheet
In the forming of a sheet, the stress vector T 3 applied to either of its faces has as its normal component the opposite of the contact pressure p and as its tangential component the frictional cission, which can always be written τ = µp, with µthe Coulomb coefficient of friction; T 3 has a modulus small compared to that of a stress vector associated...
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