Skin is an important organ and many studies have been carried out to understand its functions and behaviour. Nevertheless, there is still lack of reliable data and theory that could best define skin deformation behaviour. Therefore, this paper aims to quantify the biomechanical properties of bovine under uniaxial tension skin utilising experiment-numerical approach. Bovine skin samples were tested according to ASTM D2209-00 standard to obtain stress-stretch data. Based on the experiment data, a programme is written using Matlab to quantify and determine the bovine skin biomechanical properties. The Ogden parameters are found to be µ = 0.4 and α = 4.6. These values are important for future reference and therefore proving that the current study is significant and has contributed to the pool of knowledge in the area of skin biomechanics. Index Terms-biomechanical properties, bovine skin, ogden constitutive model
This paper focuses on the characterized of the mechanical properties and hyper elastic behavior of lab made skin. Bovine Serum Albumin (BSA) combined with gelatin as a base. BSA is a plasma lead concentrations or heparin plasma which is separated from blood sample and it is not associated with significant changes in iron or hemoglobin concentrations. In general, the gelatin is widely used as the best material for skin substitution since it exhibits the characteristic of human skin. However, the lab made skin layer was made of non-halal type gelatin (Type B). The methodology process started by adding the BSA and using the type A gelatin to carry out the mechanical properties and hy-per elastic behavior of halal lab made skin layer. A uniaxial tensile test standard that being used in this study is ASTM D412. The raw data (Load-Extension) from computational was plotted on graph stress-strain. The numerical approach such as Mooney-Rivlin model and Yeoh’s model were selected to analyze a stress-stretch of composition gelatin and BSA. From the results Mooney-Rivlin model, the con-stant, C1 is in the range of (0.0187-0.0658) MPa and C2 is in the range of (0.0628-0.0737) MPa. Meanwhile the constant, CP for Yeoh model is in the range of (0.0748-0.0861) MPa. As a conclusion, the composition of gelatin and Bovine Serum Albumin is a best combina-tion as it increases the strength of the lab made skin layer. Therefore, the most suitable composition is 10 wt.% of gelatin and Bovine Serum Albumin.
Skin is a multi-layered and complex biological structure, which makes the largest mammalian organ. Its biomechanical behaviour is important in many applications either in medical or engineering field. This sudy aims to simulate human skin deformation based on the information and comparing the biomechanical parameter with experimental procedure developed earlier. The experimental protocol to measure the skin parameters has been conducted successful earlier; and the current study attempts to quantifying the biomechanical properties of human skin using 3D Numerical Approach. Finite element (FE) models were developed using computer aided engineering software to simulate skin deformation. The methodology begins with developing the 3D geometry model of skin using ANSYS. Then, load and boundary condition were applied according to the data and information obtained from the experimental work. Finally, simulations are performed to generate data and results for further analysis and interpretation. The results are found to match available data from literatures. It could be concluded that biomechanical approach could be used in science and medical skin technology to simulate and estimate the natural behaviour of skin and to observe the actual interaction between skin and other materials.
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