An efficient mixed FEM for time-dependent Kirchhoff type integro-differential equations
摘要
This paper presents a mixed finite element framework utilizing a saddle-point formulation to address parabolic biharmonic integro-differential problems of the Kirchhoff type with simply supported boundary conditions. The paper demonstrates the well-posedness of the scheme and offers stability and error estimates for both semi-discrete and fully discrete finite element schemes. Additionally, a rectangle quadrature rule is employed to approximate the memory integral term. Numerical experiments are conducted to validate the theoretical estimates and to showcase the scheme’s effectiveness in non-convex domains.