Composite sheet intended for drawing, comprising a main sheet and at least one adhesively bonded patching sheet blank as a patch
AssigneeUsinor
InventorsFrancis Schmit, Michel Sanadres, Philippe Charbonnet
Life of this patent
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Abstract
The adhesive bonding system is chosen, applied and, where appropriate, crosslinked so as to have a critical energy release rate in mode I (tension) greater than 1500 J/m2 and a critical energy release rate in mode II (shear) greater than 2000 J/m2. The composite sheet is easily drawable to form parts requiring no curing after forming.
Claims18
A composite sheet having thickness variations and intended to be drawn, the sheet comprising at least one main metal sheet and at least one patching metal sheet blank adhesively bonded as a patch to a region of said main sheet by a bonding system having a critical energy release rate in mode I (tension) greater than 1500 J/m2, a critical energy release rate in mode II (shear) greater than 2000 J/m2, an elongation at break greater than that of said main sheet and said patch blank and an elongation at break of greater than 40%.
A drawn composite sheet having thickness variations and comprising at least one main metal sheet and at least one patching metal sheet blank adhesively bonded as a patch to a region of said main sheet by a bonding system having a critical energy release rate in mode I (tension) greater than 1500 J/m2, a critical energy release rate in mode II (shear) greater than 2000 J/m2, an elongation at break greater than that of said main sheet and said patch blank and an elongation at break of greater than 40%.
Dependencies are inferred from the claim text.