Laminate sheet, in particular for fuselage skin sheets for aircrafts
View Patent ↗A laminate sheet, in particular for use as a fuselage skin includes thin aluminium alloy sheets layered on top of one another with each two aluminium alloy sheets being adhesively bonded to one another at least in regions by an adhesive layer which includes at least one unidirectional fibreglass insert impregnated with a curable synthetic resin.
1. Laminate sheet, in particular for use as a skin sheet for an aircraft fuselage, comprising a large number of thin aluminium alloy sheets layered on top of one another, each of the aluminium alloy sheets being adhesively bonded to one another at least in regions with an adhesive layer, and each of the adhesive layers having at least one unidirectional fiberglass insert, which is impregnated with a curable synthetic resin, wherein the length of at least one aluminium alloy sheet differs in relation to at least one further aluminium alloy sheet in order to form an edge region, which is scarfed in a stepped manner at least in part, wherein a longitudinal butt strap formed in a correspondingly stepped manner is connected to the scarfed edge region by metal adhesive layers wherein the longitudinal butt strap is formed from a monolithic aluminium alloy material.
2. Laminate sheet according to claim 1 , wherein the longitudinal butt strap extends substantially over the entire length of the scarfed edge region.
3. Laminate sheet according to claim 1 , wherein the longitudinal butt strap is connected to further components.
4. Laminate sheet according to claim 1 , wherein the longitudinal butt strap comprises, at least in portions, at least one projection which is adhesively bonded between two aluminium alloy sheets whilst forming at least one wedge, in order to improve the mechanical bond between the longitudinal butt strap and the laminate sheet.
5. Laminate sheet according to claim 1 , wherein the longitudinal butt strap is connected to the laminate sheet in a substantially seam-free and flush manner.
6. Laminate sheet according to claim 3 , wherein the longitudinal butt strap is connected to at least one further laminate sheet by friction stir welding.
7. Laminate sheet according to claim 6 , wherein the longitudinal butt strap is connected to the at least one further laminate sheet by friction stir welding to form an approximately barrel-shaped fuselage section of an aircraft by forming at least one longitudinal seam.