模拟 Ti-6Al-4V 航空航天部件热成型的有限元公式比较分析

Eng Pub Date : 2024-05-13 DOI:10.3390/eng5020047
Olivier Pantalé, Sharan Raj Rangasamy Mahendren, O. Dalverny
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引用次数: 0

摘要

本研究通过全面的有限元分析,比较了不同元素配方(经典壳元素、实体元素和连续壳元素)在模拟初始坯料厚度为 1.6 毫米(0.063 英寸)的复杂 Ti-6Al-4V 航空航天部件在 725 ℃ 下的热成形过程中的性能。Ti-6Al-4V 坯料被模拟为可变形体,表现出各向异性的塑性行为,而成型工具(基体和冲头)被假定为刚性体。模拟考虑了温度和应变率对材料特性的影响,并结合了摩擦和各向异性等现象。对三种不同的元素类型进行了研究和比较:S4R 和 S4(传统壳体)、C3D8R 和 C3D8(实体)以及 SC8R(减少积分的连续壳体)。最后,通过将预测的最终零件几何形状,特别是厚度分布与实验测量结果进行比较,对模型进行了验证。该模型还能预测回弹对最终几何形状的影响。SC8R 连续壳元素最平滑地反映了最终零件关键区域的厚度变化。这项研究强调了选择合适的元素类型对于精确模拟涉及大变形和复杂接触条件的热成形过程的重要性。连续壳元素能够准确捕捉厚度变化,是此类应用的理想选择。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Comparative Analysis of Finite Element Formulations for Simulating Hot Forming of Ti-6Al-4V Aerospace Components
This study presents a comprehensive finite element analysis to compare the performance of different element formulations (classic shell elements, solid elements, and continuum shell elements) in simulating the hot-forming process at 725 °C of a complex Ti-6Al-4V aerospace component with an initial blank thickness of 1.6 mm (0.063 inches). The Ti-6Al-4V blank is modeled as a deformable body exhibiting anisotropic plastic behavior, whereas the forming tools (matrix and punch) are assumed to be rigid bodies. The simulation accounts for temperature and strain rate effects on the material properties, incorporating phenomena such as friction and anisotropy. Three different element types are studied and compared: S4R and S4 (classic shells), C3D8R and C3D8 (solids), and SC8R (continuum shell with reduced integration). Finally, the model is validated by comparing the predicted final part geometry, especially the thickness distribution, against the experimental measurements. The model can also predict the springback effect on the final geometry. The SC8R continuum shell element provides the smoothest representation of thickness variations along critical regions of the final part. The study highlights the importance of selecting the appropriate element type for the accurate simulation of hot-forming processes involving large deformations and complex contact conditions. The ability of continuum shell elements to accurately capture the thickness variations makes them an ideal candidate for such applications.
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来源期刊
Eng
Eng
CiteScore
2.10
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0.00%
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