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ANALYSIS OF A LINEAR{LINEAR FINITE ELEMENT FOR THE REISSNER{MINDLIN PLATE MODEL

ANALYSIS OF A LINEAR{LINEAR FINITE ELEMENT FOR THE REISSNER{MINDLIN PLATE MODEL,DOUGLAS N. ARNOLD,RICHARD S. FALK

ANALYSIS OF A LINEAR{LINEAR FINITE ELEMENT FOR THE REISSNER{MINDLIN PLATE MODEL   (Citations: 11)
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An analysis is presented for a recently proposed nite element method for the Reissner{ Mindlin plate problem. The method is based on the standard variational principle, uses nonconforming linear elements to approximate the rotations and conforming linear elements to approximate the transverse displacements, and avoids the usual \locking problem" by interpolating the shear stress into a rotated space of lowest order Raviart- Thomas elements. When the plate thickness t = O(h), it is proved that the method gives optimal order error estimates uniform in t. However, the analysis suggests and numerical calculations conrm that the method can produce poor approximations for moderate sized values of the plate thickness. Indeed, for t xed, the method does not converge as the mesh size h tends to zero.
Published in 1997.
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