考虑孔洞影响的单向拉伸条件下铸造材料断裂行为预测方法

仇中原; 杨雨童; 郑江; 孙晓旺; 王显会; 黄诗尧

doi:10.11868/j.issn.1001-4381.2023.000670

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材料工程 ›› 2025, Vol. 53 ›› Issue (6) : 154-161. DOI: 10.11868/j.issn.1001-4381.2023.000670

研究论文

考虑孔洞影响的单向拉伸条件下铸造材料断裂行为预测方法

仇中原 ¹^,² ,
杨雨童 ²^,³ ,
郑江 ⁴ ,
孙晓旺 ¹ ,
王显会 ¹ ,
黄诗尧 ²

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Prediction method for fracture behavior of casting materials under uniaxial tension considering effect of pores

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摘要

缺陷是影响铸造材料断裂行为的主要因素。以高压铸造铝合金为研究对象，采用Gurson-Tvergaard-Needleman（GTN）损伤模型结合有限元仿真软件对高压铸造铝合金的断裂行为开展预测。结果表明：有限元逆向拟合得到高压铸造铝合金材料适用的损伤参数，可形核孔洞体积分数f _N为0.12，临界孔洞体积分数f _c为0.001，断裂孔洞体积分数f _F为0.001。同时开展基于微观特征的断裂行为预测，通过简化孔洞形貌为椭球体和忽略体积小于0.001 mm³的孔洞的方法，避免有限仿真计算效率低和不收敛问题。对比两种模型在预测铸造材料断裂行为方面的适用性，得出结合损伤力学的有限元模拟的计算效率更高，但基于微观特征的有限元模拟的预测准确性更高。

Abstract

Defects are the main factors affecting fracture behavior of casting materials. The fracture behavior of high pressure casting aluminium alloy is predicted using Gurson-Tvergaard-Needleman （GTN） damage model combined with finite element simulation software. The results show that damage parameters suitable for high pressure casting aluminum alloy materials are obtained through finite element reverse fitting， with a nucleated void volume fraction $f N = 0.12$ ， critical void volume fraction $f c = 0.001$ ， and fracture void volume fraction $f F = 0.001$ . At the same time， fracture behavior prediction based on microscopic features is carried out by simplifying the pore morphology as ellipsoids and ignoring pores with volumes less than 0.001 mm³， to avoid low efficiency and non convergence in finite simulation calculations. The applicability of the two models in predicting the fracture behavior of casting materials is compared， and it is concluded that the finite element simulation combined with damage mechanics has higher computational efficiency， but the finite element simulation based on microscopic characteristics has higher prediction accuracy.

关键词

铸造缺陷 / 高压铸造铝合金 / 断裂行为 / GTN损伤模型 / 简化孔洞

Key words

casting defect / high pressure casting aluminium alloy / fracture behavior / GTN damage model / simplification of pore

中图分类号

TB31 / TG21⁺3

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EndNote

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仇中原 , 杨雨童 , 郑江 , 等. 考虑孔洞影响的单向拉伸条件下铸造材料断裂行为预测方法. 材料工程. 2025, 53(6): 154-161 https://doi.org/10.11868/j.issn.1001-4381.2023.000670

Zhongyuan QIU, Yutong YANG, Jiang ZHENG, et al. Prediction method for fracture behavior of casting materials under uniaxial tension considering effect of pores[J]. Journal of Materials Engineering. 2025, 53(6): 154-161 https://doi.org/10.11868/j.issn.1001-4381.2023.000670

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基金

国家重点研发计划项目(2022YFB3705500)

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Received	Revised	Published
2023-10-08	2023-12-12	2025-06-20
Issue Date
2025-06-18

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