Experimental Testing and Numerical Modeling to Capture Deformation Phenomenon in Medical Grade Polymers
Year: 2011
Type: article
Abstract: Rate-sensitivity, creep and relaxation behavior of medical grade polymers has been investigated experimentally along with an assessment of different constitutive models.Two types of modified common biomedical material A and B were tested.All materials exhibited rate-sensitivity and ratereversal behavior during creep and relaxation testing with prior loading and unloading histories for tensile and compressive tests.Numerical modeling was performed through a modified version of the Viscoplasticity Based on Overstress (VBO) model.Simulation and prediction results with good quantitative and qualitative agreement were produced for all materials in tension and compression loading.Parameter fitting using the Hybrid and Three Network Models in PolyUMod software generated material constants for ABAQUS, and the finite element results for a knee joint were verified against experimental data.The parameter fitting was unable to produce acceptable results for MATERIAL C. Implementation of VBO into the PolyUMod library is recommended to enhance modeling capability.
Author: Colin Yeakle
Institution: Miami University
Language: English
Subfield: Biomedical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2302449669