Flow Behavior and Constitutive Model Using Piecewise Function of Strain for TC11 Alloy

摘要:

针对TC11钛合金，提出了基于应变分段的Arrhenius双曲正弦模型，并进行热模拟压缩试验，分析了TC11钛合金高温流变行为及流变参数对流变应力的影响。采用分段函数的Arrhenius双曲正弦方法，在不同应变区域下求出不同的材料参数，得到了更为精确的本构模型。对比试验结果表明，模型具有很高的精度，并对比了模拟结果，表明模型是可靠的。

Abstract:

For TC11 alloy, this paper presented a more accurate constitutive model based on Arrhenius-type hyperbolic sine method by the cubic piecewise function of strain. During this modeling, compression tests of thermal simulation were carried out firstly. The effect of the flow factors on material flow stress was analyzed secondly. On analysis of the test data, the cubic piecewise functions of strain were proposed to ensure the Arrhenius-type hyperbolic sine model of high precision. Comparison with test results shows that the model presented is with high precision and simulation testing proposed show that this model is reliable.