NUMERICAL SIMULATION OF THE URINARY BLADDER

V. MONTEIRO; P. DADVAND; S. OLLER; E. OÑATE

Simposio; Symposium on Computer Methods in Biomechanics and Biomedical Engineering - CMBBE 2010; 2010

A numerical model implemented is proposed for the simulation of the urinary bladder. For the implementation, a stress-strain relationship is specified based on the evaluation of the strain energy function. The constitutive model is based on a hyperelastic neo-Hookean model. The analysis is treated within a 3D framework in total Lagragian description and a quasi-incompressible element. The interaction of the bladder wall with urine is modelled via the Particle Finite Element Method (PFEM) [1,2]. The PFEM allows the reproduction of filling and voiding of the bladder with urine, accounting for the wall-fluid interaction effects