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This In this paper, the author conducts a three-dimensional nonlinear dynamic analysis to simulate dynamic centrifuge model tests of loose and dense soils using two different soil models that is modified Drager-Prager model and kinematic subloading tij sand model. Modified Drager-Prager model is a simple soil model that requires only 5 parameters, which can be obtained from SPT-N value, and on the...
A force identification technique based on simulation models is proposed and applied to predict the concentrated force at the barycenter of an apparatus. Computation procedure of it is given, in which the model updating and verification steps are included. The mode parameters are used as the base datum for FE model updating. Two verification strategies for the force identification results are introduced,...
Microelectomechanical systems (MEMS) are often used in portable electronic products that can be subjected to mechanical shock or impact due to being dropped accidentally. This work presents a modeling and simulation effort to investigate the effect of the vibration of a printed circuit board (PCB) on the dynamics of MEMS microstructures when subjected to shock. Two models are presented. In the first...
Based on a general finite element software named ANSYS/LS-DYAN, using the function of conversion between implicit and explicit, and adopting a research method in which static analysis and dynamic analysis are combined, a research of dynamic response about underground chamber with blasting shock wave in deep environment is carried out by using numerical simulation technology. In the simulation, implicit...
In this paper, the delamination growth of sandwich plate with foam core and composite sheets under harmonic dynamic load is investigated by finite element method. The composite sheet is modeled as layered shell element considering first order shear effect, and the foam core is modeled as isotropic solid element; while for the bond line between sheet and core is simulated by using simple cohesive layer...
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