Accurate thermal stress predictions using CxB0;-continuous13; higher-order shear deformable elements

Naganarayana, BP and Mohan, P Rama and Prathap, Gangan (1997) Accurate thermal stress predictions using CxB0;-continuous13; higher-order shear deformable elements. Computer Methods in Applied Mechanics and Engineering, 144 (1-2). pp. 61-75.

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Abstract

The behavior of C xB0;-continuous higher-order shear deformable finite element formulations when applied to thermal stress conditions is analyzed critically. It is shown that, unlike in the first-order formulations, the inconsistent initial strain field can also disturb the displacement recovery in the higher-order shear deformable elements. In this paper, the possible errors due to such inconsistent terms are a priori predicted in an analytical sense and validated by using linear and quadratic beam element formulations. The paper suggests how the total and the thermal strain components have to be consistently reconstituted to get optimal accuracy from, higher-order shear-deformable finite elements for thermal stress analysis. A conflict between the consistency and the continuity requirements is noticed in such formulations. The extraneous errors observed in the variationally correct and consistent formulations are attributed to this fact.

Item Type:	Article
Additional Information:	Copyright belongs to Elsevier Science
Uncontrolled Keywords:	Accurate thermal stress;Higher-order shear;Optimal accuracy
Subjects:	AERONAUTICS > Aircraft Design, Testing & Performance
Depositing User:	Mr. N A
Date Deposited:	07 Jun 2006
Last Modified:	03 May 2012 06:06
URI:	http://nal-ir.nal.res.in/id/eprint/1434

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