Abstract
The exact solution of the governing partial differential equations describing the motion of an anisotropic porous beam with axial-flexural coupling is presented. The motion of the beam is described by the classical Euler–Bernoulli theory. The pore-fluid pressure is governed by the generalized Darcy’s law with relaxation and retardation time parameters to account for the inertia and viscosity of the fluid. Solutions are sought in the frequency domain where the governing equations are converted into a polynomial eigenvalue structure and solved exactly. The wavenumbers and group speeds of propagating waves in the beam are studied in detail. It is found that the presence of fluid-filled porous micro-structure introduces three additional propagating modes, other than the axial and bending modes predicted by the classical beam theory. The effect of diffusion boundary conditions on the transverse motion of a porous beam is investigated in detail. It is also found that the material parameters have considerable influence on the magnitude of the transverse velocity, the group speed of propagation and the behavior of the pressure resultants.
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Abousleiman Y, Cui L (1998) Poroelastic solutions in transversely isotropic media for wellbore and cylinder. Int J Solids Struct 35(34-25): 4905–4929
Abousleiman Y, Cheng A, Cui L, Detournay E, Roegiers J (1996) Mandel’s problem revisited. Geotechnique 46(2): 187–195
Badiey M, Yamamoto T (1985) Propagation of acoustic normal modes in a homogeneous ocean overlying layered anisotropic porous beds. J Acoust Soc Am 77: 954–981
Bertola V, Cafaro E (2006) Thermal instability in viscoelastic fluids in horizontal porous layers as initial value problem. Int J Heat Mass Transf 49(21-22): 4003–4012
Biot MA (1941) Consolidation settlement under rectangular load distribution. J Appl Phys 12: 426–430
Biot MA (1941) General theory of three-dimensional consolidation. J Appl Phys 12: 155–165
Biot MA (1955) Theory of elasticity and consolidation for a porous anisotropic solid. J Appl Phys 26: 182–185
Biot MA (1956) General solutions of the equations of elasticity and consolidation for a porous material. J Appl Mech 23: 91–96
Biot MA (1956) Theory of propagation of elastic waves in a fluid-saturated porous solids (parts I and II). J Acoust Soc Am 28: 168–191
Biot MA (1962) Mechanics of deformation and acoustic propagation in porous media. J Appl Phys 33: 1482–1498
Biot MA, Willis D (1957) The elastic coefficients of the theory of consolidation. J Appl Mech 24: 594–601
Cederbaum G, Li L, Schulgasser K (2000) Poroelastic structures. Elsevier Ltd, Amsterdam
Chen I, Saha S (1987) Wave propagation characteristics in long bones to diagnose osteoporosis. J Biomech 20(5): 523–527
Cheng A (1997) Material coefficient of anisotropic poroelasticity. Int J Rock Mech Min Sci 34: 199–205
Cheng S, Timonen J, Suominen H (1995) Elastic wave propagation in bone in vivo: methodology. J Biomech 28(4): 471–478
Cowin S (1999) Bone poroelasticity. J Biomech 32: 217–238
Cui L, Abousleiman Y, Cheng A, Roegiers J (1996) Anisotropic effect on one-dimensional consolidation. Eng Mech Vol 1, Proceedings of the 11th Engineering Mechanics Conference, ASCE 1(Y.K. Lin and T.C. Su):471–474
Foldes A, Rimon A, Keinan D, Popovtzer M (1995) Quantitative ultrasound of the tibia: a novel approach for assessment of bone status. Bone 17(4): 363–367
Gopalakrishnan S, Chakraborty A, RoyMahapatra D (2008) Spectral finite element method. Springer, New York
Gu W, Lai W, Mow V (1993) Transport of fluid and ions through a porous-permeable charged-hydrated tissue, and streaming potential data on normal bovine articular cartilage. J Biomech 26: 709–723
Kazi-Aoual M, Bonnet G, Jouanna P (1988) Green’s function in an infinite transversely isotropic saturated poroelastic medium. J Acoust Soc Am 84: 1883–1889
Khan M, Saleem M, Fetecau C, Hayat T (2007) Transient oscillatory and constantly accelerated non-newtonian flow in a porous medium. Int J Nonlinear Mech 42(10): 1224–1239
Kohles S, Vanderby R, Ashman R, Manley P, Markel M, Heiner J (1994) Ultrasonically determined elasticity and cortical density in canine femora after hip arthroplasty. J Biomech 27(2): 137–144
Krone R, Schuster P (2006) An investigation on the importance of material anisotropy in fe modeling of the human femur. SAE SP-1995(2006-01-0064):1–9
Menahem AB, Gibson R (1993) Directional attenuation of sh waves in anisotropic poroelastic media. J Acoust Soc Am 93: 3057–3065
Mourtada FA, Beck TJ, Hauser D, Ruff C, Bao G (1996) Curved beam model of the proximal femur for estimating stress using dual-energy X-ray absorptiometry derived structural geometry. J Orth Res 14: 483–492
Nowinski J (1971) Bone articulations as systems of poroelastic bodies in contact. AIAA J 9: 62–69
Nowinski J (1972) Stress concentrations around a cylindrical cavity in a bone treated as a poroelastic body. Acta Mech 13: 281–292
Nowinski J, Davis C (1970) A model of the human skull as a poroelastic spherical shell subjected to a quasistatic load. Math Biosci 8: 397–416
Protopappas V, Fotiadis D, Malizos K (2006) Guided ultrasound wave propagation in intact and healing long bones. Ultrasound Med Biol 32(5): 693–708
Rice JR, Cleary M (1976) Some basic stress diffusion solutions for fluid-saturated elastic porous media with compressible constituents. Rev Geophys Space Phys 14(4): 227–241
Schmitt D (1989) Acoustic multipole logging in transversely isotropic poroelastic formations. J Acoust Soc Am 86: 2397–2421
Sharma MD, Gogna M (1991) Wave propagation in anisotropic liquid-saturated porous solids. J Acoust Soc Am 90(2): 1068–1073
Thompson M, Willis J (1991) A reformulation of the equations of anisotropic poroelasticity. J Appl Mech 58: 612–616
Vashishth AK, Khurana P (2004) Waves in stratified anisotropic poroelastic media: a transfer matrix approach. J Sound Vib pp 239–275
Wang Y, Zhang Z (1997) Propagation of love waves in a transversely isotropic fluid-saturated porous layered half-space. J Acoust Soc Am 103(2): 695–701
Zhang D, Cowin S (1994) Oscillatory bending of a poroelastic beam. J Mech Phys Solids 42(10): 1575–1599
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Chakraborty, A. Wave propagation in anisotropic poroelastic beam with axial–flexural coupling. Comput Mech 43, 755–767 (2009). https://doi.org/10.1007/s00466-008-0343-6
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DOI: https://doi.org/10.1007/s00466-008-0343-6