A triangular thin shell element for the linear analysis of stiffened composite structures
Abstract
A three node flat shell element with six engineering displacement degree-of-freedom at each
node is developed. The basic formulation allows for the arbitrary location of the reference
surface in which the membrane forces and bending moments are fully coupled. The well-known,
highly accurate, DKT bending element is combined with a higher order membrane element in
order to obtain a consistent formulation. The higher order memebrane behavior is obtained
by the introduction of three additional normal rotational degree-of-freedom. This report
presents a summary of the theoretical steps involved in the development of the element. The
accuracy of the element is illustrated by the solution of several standard problems and a comparison of results with other thin shell elements. The FORTRAN 77 listing of the
subroutines which form the basic element matrices contain less than 300 statements and is
presented in order to illustrate that the computer implementation of the element is relatively simple.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.NPS Report Number
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