>Daniel Koehn schrieb:
>
>Hi Daniel:
>
> > The stress tensor is derived considering total force on
> > some portion of an elastic body. It can be written as a volume
> > integral: integral of force per unit volume.
>
>It is precisely this thought which I have discussed in my published
>paper. There
>is no force per unit volume, there can only be charge per unit volume.
>
>The theory as outlined by Landau & Lifschitz permits the conclusion that a
>volume-neutral deformation does not cost work; and this cannot possibly be
>correct.
This is not true since the work is defined in terms of changes in the
strain tensor, the whole tensor not only its diagonal components
which define volume changes. Shape changes in the body also cost work
according to elastic theory.
>Falk Koenemann
>
>
Daniel
Daniel Koehn
currently at:
Center for Advanced Studies
The Norwegian Academy of Science
Drammensveien 78, N-0271 Oslo, Norway
Tel.: +47 22 12 25 22
Fax:.+47 22 12 25 01
e-mail: [log in to unmask]
|