ANALYSIS OF MECHANICAL RESPONSE OF PVA-SERICIN HYDROGEL USING 3D SHELL ELEMENTS AND HYPERFOAM MATERIAL MODEL
Diabetic foot ulcer (DFU) is a serious complication in diabetic patients, with approximately 25% of patients at risk of soft tissue damage in the foot. The treatment of DFU poses significant challenges due to the difficulty in wound healing and the potential risk of amputation. One promising method...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/87936 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Diabetic foot ulcer (DFU) is a serious complication in diabetic patients, with approximately 25% of patients at risk of soft tissue damage in the foot. The treatment of DFU poses significant challenges due to the difficulty in wound healing and the potential risk of amputation. One promising method for DFU treatment involves the use of hydrogel-based wound dressings. In practical applications, hydrogels are subjected to various mechanical loadings that may affect their performance and effectiveness. Therefore, understanding the mechanical response of hydrogels is crucial to ensure their durability and functionality in real-world conditions.
This study aims to model and predict the mechanical behavior of hydrogels based on sericin and poly(vinyl alcohol) (PVA) using the Finite Element Method (FEM) approach. A 3D model was developed using a cubic Representative Volume Element (RVE) with an edge length of 680 ?m. The polycrystalline structure was generated using Neper based on pore size and shape parameters, converted into a cubic form with Mosaic, and subsequently transformed into shell elements using Abaqus. Simulations were conducted in Abaqus utilizing the Hyperfoam material model, applying fixed boundary conditions at the cube base and a 10% displacement at the top surface. The simulation results were validated against experimental compression test data.
The results indicate that the 3D hydrogel model accurately represents the mechanical behavior, particularly when compared to 2D models. The average Von Mises stress obtained was 0,007 MPa, closely aligning with the experimental value of 0,005 MPa. Parametric studies revealed that porosity, controlled through shell thickness, significantly influences hydrogel stiffness, with reduced porosity leading to increased material stiffness. Furthermore, the Hyperfoam model proved effective in simulating highly porous hydrogels.
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