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Continuous elements in the finite element method

 

作者: Eduardo A. Rukos,  

 

期刊: International Journal for Numerical Methods in Engineering  (WILEY Available online 1978)
卷期: Volume 12, issue 1  

页码: 11-33

 

ISSN:0029-5981

 

年代: 1978

 

DOI:10.1002/nme.1620120103

 

出版商: John Wiley&Sons, Ltd

 

数据来源: WILEY

 

摘要:

AbstractThe discretization of the media at all spatial co‐ordinates but one is presented here. This partial discretization leads to continuous finite elements as opposed to fully discrete ones and the problem resolves, for the cases presented here, into a set of linear differential equations rather than algebraic equations. The general problem of first derivative functionals in elastostatics is considered and it is shown, in general, how the continuous finite elements required for the solution may be obtained. Plane states, axisymmetric and three‐dimensional continuous elements are obtained to illustrate application to particular cases.Different methods of solution for the set of differential equations are discussed and it is shown that several existing and widely used finite element related techniques are particular cases of this local partial discretization. Three numerical examples are solved to demonstrate the good comparison obtained between the numerical and the exact solutions. The semi‐infinite examples included also illustrate the treatment of these types of problems without the use of fictitious bound

 

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