Disclosed is a composite structural element (12, 14) comprising a substantially planar main section (22) defining a coordinate system with a first axis (a) extending along the longitudinal axis (L) of the structural element (12, 14) and a second axis (b) extending perpendicular to said longitudinal axis (L) within the planar main section and defining an angle of +90° with the first axis (a), wherein the structural element (12, 14) contains a basic lay-up (28) of single plies (30, 34, 36) each consisting of a fiber-reinforced composite material with a substantially unidirectional fiber orientation (32), wherein the lay-up (28) comprises N plies arranged from top to bottom in the following form, N being an positive integer number equal to or greater than 5: [[α, β]; [γ]; [β, α]], wherein α, β and γ represent one ply (30, 34, 36) having an angle enclosed between the first axis (a) and the unidirectional fiber orientation (32) of the one ply, respectively, [x]means y plies each having angle x; [x, y]means z pairs of plies, each pair of plies having angles x, y, respectively; α = -20°, β = 40°, γ = -75° or α = 20°, β = -40°, γ = 75°, wherein each angle has a tolerance of -5° to +5°; and K is a positive integer number equal to or greater than 1 and M is a positive integer number equal to or greater than 1 as follows: N = 4·M + K.
COMPOSITE STRUCTURAL ELEMENT
VERBUNDSTRUKTURELEMENT
ÉLÉMENT STRUCTURAL COMPOSITE
2020-08-05
Patent
Electronic Resource
English
IPC: | B29C Formen oder Verbinden von Kunststoffen , SHAPING OR JOINING OF PLASTICS / B64C AEROPLANES , Flugzeuge / B32B LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM , Schichtkörper, d.h. aus Ebenen oder gewölbten Schichten, z.B. mit zell- oder wabenförmiger Form, aufgebaute Erzeugnisse |