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在20、10、0、-10、-20、-30和-40℃温度下开展了TC4钛合金拉伸行为的试验研究，分析了温度变化对材料力学性能的影响规律，构建了Johnson-Cook和Modified Zerilli-Armstrong本构模型，预测了TC4钛合金的动态本构关系，并将TC4钛合金塑性阶段的本构模型代入ABAQUS软件进行拉伸有限元模拟仿真分析。结果表明：TC4钛合金在试验温度区间内具有一定敏感性。随着温度的下降，TC4钛合金的弹性变形能力变化不大，塑性变形能力、抗拉强度和屈服强度逐渐提高，而最大伸长率先增大后减小，0℃时最大，-40℃时最小；塑性阶段-40℃时材料的应力值最大，20℃最小；0℃时材料的断裂应变最大，-40℃最小。还发现Johnson-Cook本构的预测结果与试验值吻合更好；仿真与试验在塑性阶段和断裂阶段具有较好的吻合性，屈服强度、抗拉强度和伸长率的误差在5%以内。
Abstract：The test studies on the tensile behaviors of TC4 titanium alloy were carried out at 20, 10, 0,-10,-20,-30 and-40 ℃, and the effect laws of temperature change on the mechanical properties of the material were analyzed. The Johnson-Cook and Modified Zerilli-Armstrong consititutive models were constructed to predict the dynamic constitutive relationship of TC4 titanium alloy, and the constitutive models of TC4 titanium alloy at the plastic stage were introduced into ABAQUS software for tensile finite element simulation analysis.The results show that TC4 titanium alloy has a certain sensitivity in the test temperature interval. With the decrease of temperature, the elastic deformation capacity of TC4 titanium alloy changes little, the plastic deformation capacity, tensile strength and yield strength gradually increase, while the maximum elongation increases first and then decreases, and the maximum value is reached at 0 ℃, and the minimum value is reached at-40 ℃.The stress value of the material is the maximum at-40 ℃ and the minimum at 20 ℃ in the plastic stage. The fracture strain value is the maximum at 0 ℃ and the minimum at-40 ℃.It also is found that the Johnson-Cook constitutive prediction results are in good agreement with the test values.The simulation and test have a good agreement in the plastic stage and fracture stage, and the error of yield strength tensile strength and elongation is less than 5%.
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基本信息:
中图分类号:TG146.23
引用信息:
[1]詹奇云,靳刚,韩进,等.TC4钛合金低温拉伸行为与本构建模[J].塑性工程学报,2024,31(01):204-215.
基金信息:
天津市自然科学基金重点资助项目(22JCZDJC00740); 天津市教委科研计划项目(2020KJ111)
2024-01-24
2024-01-24
2024-01-24