1Cr21Ni5Ti双相钢本构关系与失效准则参数研究

柳蕴韶; 曾生辉; 陈军红; 尹标; 张胜德; 黄西成

doi:10.7643/issn.1672-9242.2026.04.010

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装备环境工程 ›› 2026, Vol. 23 ›› Issue (4) : 104-113. DOI: 10.7643/issn.1672-9242.2026.04.010

航空航天装备

1Cr21Ni5Ti双相钢本构关系与失效准则参数研究

柳蕴韶, 曾生辉, 陈军红, 尹标, 张胜德, 黄西成

作者信息 +

Constitutive Model and Failure Criterion Parameters of 1Cr21Ni5Ti Duplex Steel

LIU Yunshao, ZENG Shenghui, CHEN Junhong, YIN Biao, ZHANG Shengde, HUANG Xicheng

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文章历史 +

摘要

目的针对航天用1Cr21Ni5Ti双相钢,构建描述该材料在宽应变率范围下大变形及失效行为的材料模型。方法采用“试验测试-模型改进-参数标定”的递进式研究方法：首先通过材料试验机与分离式霍普金森拉杆装置,测试1Cr21Ni5Ti双相钢准静态及高应变率力学性能,明确应变率对屈服强度和应变硬化行为的影响规律;其次基于该规律改进传统Johnson-Cook（J-C）本构模型,引入应变硬化应变率相关项;最后开展缺口试样静动态拉伸实验获取变形过程真实应变场,结合有限元模拟计算各试件平均应力三轴度和断裂应变,确定J-C失效模型参数。结果 1Cr21Ni5Ti双相钢屈服行为和应变硬化行为具有明显的应变率相关性。改进J-C本构模型可精准描述材料宽应变率力学行为,基于平均应力三轴度的J-C失效模型能准确反映不同应变率下的断裂特性。结论应变率是影响该材料力学行为与断裂特性的关键因素;改进后的J-C本构及失效模型适用性良好,可满足航天领域精准预测需求,为构件设计与安全评估提供支撑。

Abstract

The work aims to construct a material model for describing the large deformation and failure behaviors of 1Cr21Ni5Ti duplex steel used in aerospace under a wide strain rate range. A progressive research method of “experimental testing-model improvement-parameter calibration” was adopted. Firstly, the mechanical properties of 1Cr21Ni5Ti duplex steel under quasi-static and high strain rates were tested with a material testing machine and a split Hopkinson tension bar device to clarify the influence law of strain rate on the yield strength and the strain hardening behavior of the material; Secondly, the traditional Johnson-Cook (J-C) constitutive model was improved based on this law by introducing a strain rate-dependent term for the strain hardening behavior; Finally, static and dynamic tensile tests on notched specimens were carried out to obtain the true strain field during deformation, and the average stress triaxiality and fracture strain of each specimen were calculated by combining with finite element simulation to determine the parameters of the J-C failure model. The results showed that the yield behavior and the strain hardening behavior of 1Cr21Ni5Ti duplex steel had obvious strain rate dependence, the improved J-C constitutive model could accurately describe the mechanical behavior of the material under a wide strain rate range, and the J-C failure model based on average stress triaxiality could effectively reflect the fracture characteristics of the material under different strain rates. It is concluded that strain rate is a key factor affecting the mechanical behavior and fracture characteristics of the material; the improved J-C constitutive model and the corresponding failure model have good applicability, which can meet the demand for accurate prediction in the aerospace field and provide support for the design and safety evaluation of related components.

导出引用

柳蕴韶, 曾生辉, 陈军红, 尹标, 张胜德, 黄西成. 1Cr21Ni5Ti双相钢本构关系与失效准则参数研究[J]. 装备环境工程. 2026, 23(4): 104-113 https://doi.org/10.7643/issn.1672-9242.2026.04.010

LIU Yunshao, ZENG Shenghui, CHEN Junhong, YIN Biao, ZHANG Shengde, HUANG Xicheng. Constitutive Model and Failure Criterion Parameters of 1Cr21Ni5Ti Duplex Steel[J]. Equipment Environmental Engineering. 2026, 23(4): 104-113 https://doi.org/10.7643/issn.1672-9242.2026.04.010

中图分类号： O347.3

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