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	Transverse (through-the-thickness) shear stiffnesses of fibre reinforced composite laminated plates.
DATA Item	89013
KEYWORD	composite, fibre, laminated, orthotropic, panel, plate, program, reinforced, sandwich, shear, stiffness, transverse, fiber
ISBN	0 85679 684 0
ABSTRACT	ESDU 89013 introduces a Fortran program provided on disc in the software volume (ESDUpac A8913) both uncompiled and compiled within ESDUview, a user-friendly interface that prompts for input data and runs under MS DOS. The program calculates the stiffnesses of laminated plates (or a sandwich panel) from the properties of the layers, with no restriction on the lay-up arrangement. The theory is outlined and assumes that points on a normal to the mid-surface before bending remain in a straight line, although not normal to the mid-surface, after bending. This allows rotation in shear to be added to rotation due to classical plate bending. Example calculations are included together with graphs showing the effect of lay-up on the shear stiffnesses. A full description of the input and output of the program is provided, with details of various warning messages that may be generated, and the testing to which the program was subjected is discussed. Values of transverse shear stiffness are important in calculating deflections caused by through-thickness shear stresses, particularly for laminated plates for which the tranverse stiffnesses, which depend on the properties of the matrix material bonding the fibres together, are low.