국내 최대 기계 및 로봇 연구정보

공학설계D/B

공학설계D/B 게시판 내용
Volume Title	Structures
Volume No	Laminated composites - stress analysis, stiffnesses, lay-ups for special orthotropy, circular hole stress raiser, through thickness shear stiffness, laminate design.
DATA Title	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.)
DATA Item	86003
KEYWORD	circular, composite, concentration, distribution, fibre, hole, laminated, orthotropic, plate, raiser, reinforced, reinforcement, strain, stress, fiber
ISBN	0 85679 555 0
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.