文章信息/Info

Title:

Numerical Simulation of Hydraulic Forming Process for TA2 Titanium T-Junction Based on CPB06 Criterion

文章編號:

1674-3962(2025)08-0778-07

作者:

孫凌燕; 程亮; 郭海晶; 李若琳; 張志遠(yuǎn); 楊超; 孫峰

1. 江蘇理工學(xué)院材料工程學(xué)院，江蘇 常州 213001 2. 西北工業(yè)大學(xué) 重慶科創(chuàng)中心，重慶 401135 等。

Author(s):

SUN Lingyan;  CHENG Liang;  GUO Haijing;  LI Ruolin; ZHANG Zhiyuan;  YANG Chao;  SUN Feng

1. School of Materials and Engineering, Jiangsu University of Technology,Changzhou 213001, China 2. Chongqing Innovation Center, Northwestern Polytechnical University,Chongqing 401135, China et al.

關(guān)鍵詞:

純鈦; 三通; 液壓成形; 屈服準(zhǔn)則; 各向異性; 數(shù)值模擬

Keywords:

pure titanium;  T-junction;  hydraulic forming;  yield criterion;  anisotropy; numerical simulation

分類號:

TG306

DOI:

10.7502/j.issn.1674-3962.202404032

文獻(xiàn)標(biāo)志碼:

A

摘要:

針對TA2純鈦三通液壓成形過程進(jìn)行有限元數(shù)值模擬，分別采用米塞斯各向同性屈服準(zhǔn)則和CPB06屈服準(zhǔn)則，對結(jié)果進(jìn)行了對比分析。組織分析結(jié)果表明，純鈦管材存在明顯的傾轉(zhuǎn)基面織構(gòu)，同時(shí)由于本征滑移系數(shù)量過少，因此出現(xiàn)拉壓不對稱、各向異性強(qiáng)烈、扭曲強(qiáng)化效應(yīng)顯著等力學(xué)行為特征，導(dǎo)致常規(guī)的米塞斯屈服準(zhǔn)則難以適用，模擬結(jié)果與實(shí)際成形過程相差過大，尤其是出現(xiàn)了不符合工程實(shí)際的支管崩潰現(xiàn)象。而CPB06屈服準(zhǔn)則由于考慮了拉壓不對稱和各向異性硬化，因此能夠準(zhǔn)確描述純鈦在三通成形過程中的材料流動行為，模擬結(jié)果與實(shí)驗(yàn)結(jié)果吻合良好。采用所建立的基于CPB06屈服準(zhǔn)則的有限元數(shù)值模型，能夠?qū)�純鈦三通成形過程的物理場演變行為及成形缺陷進(jìn)行分析預(yù)測，為工藝優(yōu)化和失效分析提供理論支撐。

Abstract:

In this study，numerical simulations on the hydraulic forming process of TA2 pure titanium T-junction were conducted, using the commonly used Mises yield criterion and the CPB06 yield criterion respectively, and the simulated results were compared and analyzed. The microstructure results indicate that pure titanium tubes have obvious tilted basal texture. At the same time, due to the limited number of intrinsic slip systems, there are mechanical characteristics such as tension-compression asymmetry, strong anisotropy, and significant distortion strengthening effect. This makes the Mises yield criterion difficult to apply, and the simulation results deviate significantly from the actual forming process, especially with the occurrence of branch collapse that does not conform to engineering practice. The CPB06 yield criterion, however, can correctly describe the material flow behavior of pure titanium during the T�瞛unction forming process due to the consideration of tension-compression asymmetry and anisotropic hardening. The simulation results are in good agreement with experimental results. By employing the established finite element model based on CPB06 yield criterion, it is possible to analyze and predict the evolution of the physical fields and forming defects in the pure titanium T-junction forming process, providing theoretical support for process optimization and failure analysis.