Constructing accurate constitutive equation from the optimal material constants is the basis for finite element numerical simulation. To accurately describe the creep ageing behavior of 2A12 aluminum alloy, the present work is tentatively to construct an elastic-plastic constitutive model for simulation based on the ANSYS environment. A time hardening model including two stages of primary and steady-state is physically derived firstly, and then determined by electronic creep tensile tests. The material constants within the creep constitutive equations are obtained. Furthermore, to verify the feasibility of the material model, the ANSYS based numerical scheme is established to simulate the creep tensile process by using the proposed material model. Results show that the creep constitutive equation can better describe the deformation characteristics of materials, and the numerical simulations and experimental test points are in good agreement.
In this paper, the structural strain of the beam shear stress sensor is optimized, and the average strain of the strain sensor is simulated by Ansys Workbench. Firstly, the mathematic model of the beam sensor is established, and the stress and strain of the model are analyzed theoretically. Secondly, the finite element modeling of the sensor is carried out, and the finite element simulation of Ansys Workbench is carried out. The key dimensions of strain measurement are studied by parameter driven. Then the simulation results show that the effect of the production patch error on the output is quantitatively analyzed. Finally, the feasibility of mathematical model theory and finite element simulation is verified by calibration experiment.
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