Prediction method of plastic deformation mode for multi-pass cold drawing of pure aluminum conductor based on ANSYS/LS-DYNA

A prediction method and technology of plastic deformation, applied in geometric CAD, design optimization/simulation, instruments, etc., can solve the problem of lack of accurate understanding of pure aluminum wire, and achieve the effect of improving drawing process and improving fracture strength
CN108509666BActive Publication Date: 2021-05-25INST OF METAL RESEARCH - CHINESE ACAD OF SCI +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
Publication Date
2021-05-25

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Abstract

The invention discloses a method for predicting the plastic deformation mode of multi-pass cold drawing of industrial pure aluminum wires based on ANSYS / LS-dyna, which mainly includes: establishing based on ANSYS parametric modeling technology according to the process parameters of pure aluminum wires and molds The solid model of the wire and the mold; according to the large deformation behavior of the wire during the drawing process, select the dynamic hardening material model and determine the parameters of the material model according to the tensile stress-strain curve of each pass wire; according to the wire drawing on the wire drawing machine The traction mode and pulling speed determine the loading mode and boundary conditions of the finite element model; finally, the defined finite element analysis model is submitted to LS-dyna for calculation, and the result file is post-processed with ANSYS, and the stress distribution and plastic deformation cloud diagram are output, and Draw the stress change curve from the core to the surface of each pass. The invention improves the existing wire simulation method, improves the calculation efficiency and calculation accuracy, greatly shortens the verification time of process parameters and reduces the design cost compared with the test method.
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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...

Claims

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