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Subject: Re: Hex & Tet elements
Author: Johan Hsu
Date: 1998-12-14 09:31:00I don't have my book with me right now but I do remember that the Hex elements
produce better result than Tet elements only when the edges of the Hex's form
at
right angles.(4 degree either side?) In the other word, if the element is
distorted 3 Tet's produce better result than a single Hex. Correct me if I got
it all wrong.
J. Hsu
> Date: Mon, 14 Dec 1998 10:20:40 +0100
> From: Roberto Muccini
> To: xansys@o...
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> Subject: [xansys] Re: FW: Hex & Tet elements
> From: Roberto Muccini
> Ng Siu Wai, Alex wrote:
> > From: "Ng Siu Wai, Alex"
> > -----Original Message-----
> > From: Binxin Wang [SMTP:wangbinxin@h...]
> >
> > Sent: Friday, December 11, 1998 10:59 PM
> > To: feusers@m...
> > Subject: Hex & Tet elements
> > Dear all,
> > Can any one there provide any reference explaining theoretically why linear
> > Hex elements produce better results than Tet elements.
> > Thanks in advance.
> > Regards.
> > Binxin
> FE routines calculate results in a fixed number of points for each
> elements (Gauss points) then average across the element. The accuracy of
> results is function of the number of this points (then the interpolation
> function order): e.g. if you have two points you can use a linear
> function, if three a quadratic, ecc.
> This are only few words about this matter. You can find exhaustive
> explanation in every basic FE book.
> For example:
> Cook et al. "Concepts and applications of finite elemnt analysis",
> second edition, John Wiley and Sons, New York 1981
> Bathe et al. "Finite element Procedures in Engineering Analysis",
> Prentice Hall, Englewood Cliffs 1982
> Zienkiewicz et al. "The finite element method", Mc-Graw Hill Company,
> London 1977
> Hope this helps
> Roberto Muccini
> Muccini Roberto
> Laboratorio di Tecnologia dei Materiali tel. +39-(0)51-6366864550
> Istituti Ortopedici Rizzoli fax. +39-(0)51-6366863
> via di Barbiano 1/10 e-mail:muccini@t...
> 40136 Bologna, Italy
Johan Hsu, MSME
FEA Analytical Engineer
SIEMENS Westinghouse Power Corp.
Orlando, Florida