A Finite Element Modeling Method for Arc Additive Manufacturing

Abstract

The invention discloses an arc additive manufacturing finite element modeling method. The method comprises the following steps of: calculating an arc shape and determining the width of an additive area birth-death element; calculating a molten drop shape and determining the height of the additive area birth-death element; establishing an arc additive manufacturing finite element geometric model according to the width of the additive area birth-death element and the height of the additive area birth-death element; correcting the arc shape and the molten drop shape through verifying the temperature distribution of the arc additive manufacturing finite element geometric model, so as to correct the arc additive manufacturing finite element geometric model. According to the method disclosed by the invention, the geometric size of the additive area birth-death element can be determined before the arc additive manufacturing finite modeling by adopting an arc additive manufacturing simulation process, combining an arc shape simulation technology, a molten drop shape simulation technology and a finite element simulation technology and carrying out experimental verification, so as to realize the correct calculation of arc additive manufacturing finite element simulation.

Description

technical field [0001] The invention relates to the field of arc additive manufacturing, in particular to a finite element modeling method for arc additive manufacturing. Background technique [0002] In recent years, additive manufacturing technology has developed rapidly as an emerging technology and has been continuously applied in industrial production. The forming materials are continuously developing from the initial light-curing resin to metal materials, and the forming structure is also developing towards large-scale integration. Arc additive manufacturing using arc as a heat source has the characteristics of high heat input, fast forming speed, low cost, and simple equipment. It is very suitable for large-scale integrated structural parts, including large-scale molds, large-scale aero-engines, and large-scale aircraft panels. . However, there are still many forming defects in the arc additive manufacturing process, and the physical mechanism of the forming process...

AI Technical Summary

Problems solved by technology

Therefore, it is necessary to clarify the additive area size, material parameters and arc additive process parameters before the arc additive manufacturing finite element modeling, but the additive area size is unknown before the arc additive manufacturing experiment, and the traditional modeling method must be The size parameters of the additive area can only be given after the experiment. Modeling in this way violates the principle of numerical simulation

Although the existing finite element software is powerless before modeling, the simulation results of other fluid dynamics simulation software can provide the necessary parameters for finite element modeling

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