ESDU 86003: Reinforcement for a circular hole in a laminated plate

Abstract:

ESDU 86003 shows how the program of ESDU 85001, which estimates the strain distribution around a circular hole in a fibre-reinforced composite plate, is used to establish the integrity of such a structure. Working in terms of strains and a simplified overall plate criterion, the program can be used to generate design curves for any selected lay-up of layers with any properties. Those design curves can then be used to determine the minimum reinforcement and its lay-up to ensure that local stresses or strains around the hole boundary nowhere exceed some specified allowable values. As an illustration of the method design curves are given for a particular material, and two fully worked examples show how they are used to establish the form of symmetrical reinforcement, or reinforcement on one side of the plate alone, to meet allowable maximum strain values.

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Details:

Data Item ESDU 86003
Format:	PDF with interactive graphs
Status:	Original, issued 01 May 1986 Published in Release 2000-03 (init)
Previous Releases:	None available
ISBN:	978 0 85679 555 8

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This Data Item contains 11 interactive graph(s) as listed below.

Graph	Title
Figure 1 - Part 1	Values of ε_xmax as multiples of ε_x∞ and γ_xy∞
Figure 1 - Part 2	Values of ε_xmax as multiples of ε_x∞ and γ_xy∞
Figure 2 - Part 1	Values of ε_ymax as multiples of ε_x∞ and γ_xy∞
Figure 2 - Part 2	Values of ε_ymax as multiples of ε_x∞ and γ_xy∞
Figure 3 - Part 1	Values of \|γ_xymax\| as multiples of ε_x∞ and γ_xy∞
Figure 3 - Part 2	Values of \|γ_xymax\| as multiples of ε_x∞ and γ_xy∞
Figure 4a	Values of applied stress which at hole boundary meet strain criteria
Figure 4b	Values of applied stress which at hole boundary meet strain criteria
Figure 4c	Values of applied stress which at hole boundary meet strain criteria
Figure 4d	Values of applied stress which at hole boundary meet strain criteria
Figure 4e	Values of applied stress which at hole boundary meet strain criteria

ESDU 86003

Example of the use of Data Item No. 85001. Choice of reinforcement for a circular hole in a fibre reinforced laminated plate. (Data relating to one particular set of laminate properties.)