TY  - JOUR
A1  - Guadalupe Suarez, Viana Lida
A1  - Militello, C.
A1  - Recuero López, Manuel
SP  - 54
N2  - From the elastic energy contained in a displacement based porous material the general form of the stiffness and mass matrices are obtained. If both fields can be expanded with equal order polynomials the general form is further simplified and it is shown that the coupling stiffness reduces to the one arising to compute volume changes in an elastic medium. A plane beam and a four node tetrahedron are developed. To avoid spurious rotational modes appearance in the tetrahedron fluid a penalty formulation is used. The effect of the penalty factor in matrix conditioning is analysed. Elements dynamic behaviour is compared.
JF  - Computers and structures
ID  - upm10467
PB  - Elsevier B.V.
AV  - public
Y1  - 2012///
SN  - 0045-7949
KW  - Porous elements; Displacement formulation; Spurious modes; Porous beam; Porous tetrahedron
TI  - Acoustoelastic Pure-Displacement Elements Based on Biot's Poromechanics Theory
UR  - http://www.sciencedirect.com/science/article/pii/S0045794912000065
EP  - 60
VL  - 96-97
ER  -