5/31/2023 0 Comments Curve fitting scilabFurther examination suggested that these differences arose from numerical effects, e.g. However, discrepancies were discovered when fitting the Ogden material models. The comparison showed that the lower order Yeoh and Polynomial model parameters from the Scilab scripts and the commercial FEA software match perfectly. For lower order models, the scripts were compared against the parameter sets provided by ANSYS. Scilab scripts were created to be able to fit the experimental stress-stretch data to higher order hyperelastic material models than ANSYS allows for. Despite offering to input material parameters for higher order derivatives of the selected material models, the utilised commercial FEA code ANSYS did not feature curve fitting for each of these models. The stress-stretch curves had to be computed from force-displacement data, which required adjustment due to bonding effects. Three phenomenological hyperelastic material model formulations (Ogden, Polynomial, Yeoh) were preselected from literature and had to be fitted to closely match previously measured stress-stretch curves from axial compression/tension as well as simple shear measurements. In order to be able to access mechanical stress and strain within the silicone, a hyperelastic material model formulation was chosen. The system’s quasi-static mechanical response to loading was to be examined using finite element analysis (FEA). The system’s aim is to promote bone growth by allowing for axial motion within the fracture gap. An under-development bone fracture plating system is going to include silicone rubber as suspension material.
0 Comments
Leave a Reply. |