YANG Xiao, WANG Chen. Nonlinear Mathematical Model for Large Deflection of Incompressible Saturated Poroelastic Beams[J]. Applied Mathematics and Mechanics, 2007, 28(12): 1417-1424.
Citation: YANG Xiao, WANG Chen. Nonlinear Mathematical Model for Large Deflection of Incompressible Saturated Poroelastic Beams[J]. Applied Mathematics and Mechanics, 2007, 28(12): 1417-1424.

Nonlinear Mathematical Model for Large Deflection of Incompressible Saturated Poroelastic Beams

  • Received Date: 2006-08-17
  • Rev Recd Date: 2007-11-05
  • Publish Date: 2007-12-15
  • Nonlinear governing equations were established for large deflection of incompressible fluid saturated poroelastic beams under constraint that diffusion of the pore fluid is only in the axial direction of the deformed beams. Then, the nonlinear bending of a saturated poroelastic cantilever beam with fixed end impermeable and free end permeable, subjected to a suddenly applied constant concentrated transverse load at its free end, was examined with the Galerkin truncation method. The curves of deflections and bending moments of the beam skeleton and the equivalent couples of the pore fluid pressure were shown in figures. The results of the large deflection and the small deflection theories of the cantilever poroelastic beam were compared, and the differences between them are revealed. It is shown that the results of the large deflection theory are less than those of the corresponding small deflection theory, and the times needed to approach its stationary states for the large deflection theory are much less than those of the small deflection theory.
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