Title : Mooney rivlin and ogden numerical material models of ultra soft tissue equivalent alginate hydrogels
Abstract:
The characteristics of alginate hydrogels are comparable to those of extracellular matrix (ECM). Because of this, their mechanical behavior is similar to that of soft tissue, which makes them suitable for the creation of soft deformable structures that are comparable to tissue. Since soft structures have different qualities from typical engineering structures (Young's modulus on the order of 100-101 kPa), they are currently receiving a lot of interest for advanced engineering applications. These characteristics include mechanical tissue compatibility, a broad deformation threshold, and the relative simplicity of customizing the properties to fit specific needs, depending on the material, and intended use. Advanced applications of these materials are being investigated, such as stretchable electronics, soft robots, scaffolds filled with cells for tissue engineering, and tissue-equivalent phantoms. Main objective is this paper is to identify Mooney-Rivlin and Ogden hyperelastic material models of ultra-soft equivalent hydrogels by utilizing a CAE-based application using ANSYS curve fitting tool to estimate the material constants by entering user-provided experimental data. By using ANSYS curve fitting tool, experimental stress-strain curves are transformed into Mooney-Rivlin and Ogden hyperelastic models and the corresponding material parameters are obtained. The quality of the fitting is evaluated by comparing the curves produced with ANSYS Mooney-Rivlin and Ogden material models to experimental data. The results revealed that Mooney-Rivlin and Ogden hyperelastic models effectively characterize the mechanical behavior of the ultra-soft Tissue- equivalent alginate hydrogels.
