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.)
Abstract:
ESDU 86003 shows how the program of ESDU 85001, which estimates the strain distribution around a circular hole in a fibrereinforced 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 layup of layers with any properties. Those design curves can then be used to determine the minimum reinforcement and its layup 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.Indexed under:
 Circular Holes in Orthotropic Plates
 Composite Structures
 Laminated Construction Using Composites
 Reinforced Circular Holes in Flat Plates
Details:
Data Item ESDU 86003  

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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 