The deformation behavior of an artificial heart valve was analyzed using the explicit dynamic finite element method. Time variations of the left ventricle and the aortic pressure were considered as the mechanical boundary conditions in order to reproduce the opening and closing movements of the valve under the full cardiac cycle. The valve was assumed to be made from a medical polymer and hence, a hyperelastic Mooney–Rivlin model was assigned as the material model. A simple formula of the damage mechanics was also introduced into the theoretical material model to express the hysteresis response under the unloading state. Effects of the hysteresis on the valve deformation were characterized by the delay of response and the enlargement of displacement. Most importantly, the elastic vibration observed in the pure elastic response under the full close state was dramatically reduced by the conversion of a part of elastic energy to the dissipated energy due to hysteresis.
The main purpose of the present study is to develop one degree of freedom of frontal human head impact test procedure using finite element simulation. This study is to compare the results between simulation and experimental result conducted by Delye et al. To conduct this study, the process involve is to develop finite element modeling of human skull and to analyze the data analysis which investigating the impact conditions of human skull during a human head impact on the resulting total deformation and stress distribution. There were geometric preparations, selection of elements, selection of materials, application of loadings, and the specification of boundary conditions.
Implant loosening and deformation issues contribute to the instability of the hip arthroplasty. Prosthesis stem malalignment can occur in varus, anteversion and retroversion in different degrees due to several reasons. In this study, computational analysis of cementless hip arthroplasty with different stem malalignment cases was conducted to investigate the biomechanical effects in hip arthroplasty. Five hip arthroplasty models were developed using finite element analysis which are straight/aligned model, malalignment models at varus +3°, varus -3°, sagittal flexed +3°, and sagittal extended -3°. Results show that different pattern of stress distribution was observed in each malalignment case. The varus -3° malalignment model had demonstrated the greatest risk of failure based on the resulting stress distribution and total deformation.
This paper aims to model, simulate and perform the static analysis of a go-kart chassis consisting of circular beams. Modelling, simulations and analysis are performed using modelling software i.e. SolidWorks for Go Kart Challenges 2017 (GKC-17). The maximum stress and displacement is determined by performing static analysis. The result of maximum stress is compared to maximum yield strength of maximum stress whether the maximum stress is exceeding the maximum yield strength or not. It can also show the displacement where it shows the deformation of the chassis part when the load applied to the chassis.
Keywords: chassis; Go kart; FEA; SolidWorks
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