Finite element simulation of 3D printing concrete using equivalent element method
Due to the layer characteristics and anisotropic mechanical properties of 3D printed concrete,there is still lacking effective numerical simulation method for force analysis of 3D printed concrete.In this paper,the lin-ear elastic constitutive parameters of 3D printed concrete anisotropic equivalent elements are deduced,based on the deformation conditions and mechanical equilibrium conditions,and based on the shear stress reciprocity theo-rem,the layer stress calculation method of 3D printed concrete is given.A 100 mm×100 mm×100 mm 3D printed concrete cubic block is taken as an example.The ANSYS finite element software is carried out to simulate the force performance of 3D printed concrete.The results show that the number of elements obtained by the equivalent element method is reduced by 64 times,the overall error of the displacement results can be controlled within 1%,and the calculation efficiency is increased by more than 430 times.Through the research in this paper,the finite element simulation analysis of anisotropic 3D printed concrete with layer characteristics is realized,which can greatly improve the calculation efficiency under the premise of ensuring the calculation accuracy.
3D printingconcreteanisotropyweak interlayermechanical properties
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