Weak Solutions for a Poro-elastic Plate System





Citation of Original Publication

Elena Gurvich & Justin T. Webster (2022) Weak solutions for a poro-elastic plate system, Applicable Analysis, 101:5, 1617-1636, DOI: 10.1080/00036811.2021.1953483


This is the submitted manuscript of an article published by Taylor & Francis in Applicable Analysis on 21 July 2021, available online: http://www.tandfonline.com/10.1080/00036811.2021.1953483.



We consider a recent plate model obtained as a scaled limit of the three dimensional Biot system of poro-elasticity. The result is a "2.5" dimensional linear system that couples traditional Euler-Bernoulli plate dynamics to a pressure equation in three dimensions, where diffusion acts only transversely. We alow the permeability function to be time-dependent, making the problem non-autonomous and disqualifying much of the standard abstract theory. Weak solutions are defined in the so called quasi-static case, and the problem is framed abstractly as an implicit, degenerate evolution problem. Utilizing the theory for weak solutions to implicit evolution equations, we obtain existence of solutions. Uniqueness is obtained under additional hypotheses on the regularity of the permeability. We address the inertial case in an appendix, by way of semigroup theory. The work here provides a baseline theory of weak solutions for the poro-elastic plate, and exposits a variety of interesting related models and associated analytical investigations.