Multi-pass cold-drawing plastic deformation pattern prediction method for pure aluminium wires based on ANSYS/LS-dyna

Abstract

The invention discloses a multi-pass cold-drawing plastic deformation pattern prediction method for pure aluminium wires based on ANSYS / LS-dyna. The method mainly comprises the steps that according totechnological parameters of the pure aluminium wires and a mold, an entity model of the wires and the mold is established based on an ANSYS parametric modeling technology; according to a large deformation behavior of the wires in the drawing process, a kinematic hardening material model is selected, and parameters of the material model are determined according to a tensile stress-strain curve ofthe wires in all passes; a loading mode and a boundary condition of a finite element model are determined according to the drawing traction mode and drawing speed of the wires on a drawbench; and last, a defined finite element analysis model is submitted to LS-dyna for calculation, ANSYS is used to post-process a result file, a stress distribution and plastic deformation cloud chart is output, anda stress change curve of the wires in all the passes from the central part to the surface layer is drawn. According to the method, an existing wire simulation method is improved, and calculation efficiency and calculation precision are improved; and compared with a test method, technological parameter verification time is greatly shortened, and design cost is lowered.

Description

technical field [0001] The invention relates to the research field of cold drawing of industrial pure aluminum wires, and in particular provides a method for predicting the plastic deformation mode of multi-pass cold drawing of industrial pure aluminum wires based on ANSYS / LS-dyna. Background technique [0002] Cold-drawn industrial pure aluminum conductors, as an important part of steel-reinforced aluminum stranded wire, are widely used in long-distance transmission lines. In the service environment, the wire is easily affected by loads such as self-weight, ice load, and wind load. Under this influence, the pure aluminum wire is prone to fracture. Therefore, improving the breaking strength of the wire plays an important role in improving the safety of the wire in service. [0003] At present, industrial pure aluminum conductors are obtained from original aluminum rods through nine passes of cold drawing, and their mechanical properties have been significantly improved comp...

AI Technical Summary

Problems solved by technology

However, there is still a lack of accurate understanding of the plastic hardening behavior of pure aluminum wires during the drawing process, and an effective method is urgently needed for systematic analysis and research on this issue.

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