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Current clinical data suggest a higher failure rate for internal fixation in Vancouver type B1 periprosthetic femoral fracture (PFF) fixations compared to long stem revision in B2 fractures. The aim of this study was to compare the biomechanical performance of several fixations in the aforementioned fractures. Finite element models of B1 and B2 fixations, previously corroborated against in vitro experimental...
A novel laser high speed punching is presented. The laser induced shock wave acts as a punch. The forming speed can be controlled by adjustment of the laser energy. The previously-reported experimental results show that laser high speed punching is possible. This paper reports an investigation into the laser high speed punching process through finite element simulation. The Johnson-Cook model shear...
Aseptic loosening is the critical reason for the failure of the cemented total hip arthroplasty. It occurs due to bone remodeling triggered by stress shielding and cement mantle fracture. In this study, stress shielding and bone thickening phenomenon of the cemented THA femur was analysed using three dimensional finite element method for walking load case. The intact femur is modeled to consist of...
In this paper, the damage fracture of solder joints in board level electronic package subjected to drop impact loadings was numerically simulated by the finite element method and the cohesive zone model. The solder-Cu pad interface was modeled by cohesive zone elements. The results show that fracture initiates at the edge of the PCB side and the damage of solder joint is affected greatly by the used...
Precision bar cutting process is a typical large localized plastic deformation process. Based on its forming characteristics, a numerical model is established and an elasto-plastic simulation is performed using the finite element method (FEM). The re-meshing method is used when the severe element distortion occurs to facilitate further computation and avoid divergence. The Normalized Cockroft &...
A finite element method involving Johnson-Cook material model and fracture criterion was used to simulate the serrated chip morphology during high speed machining AISI 4340 hardened steel in different rake angles using commercial FE software ABAQUS. The effects of rake angle and chip morphology on cutting force were discussed. The investigation indicates that the simulation results are consistent...
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