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首页> 外文期刊>Materials at High Temperatures >Visco-plastic constitutive model considering non-proportional hardening at elevated temperature under multiaxial loading
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Visco-plastic constitutive model considering non-proportional hardening at elevated temperature under multiaxial loading

机译：在多轴载荷下考虑升高温度下非比例硬化的粘型塑性本构模型

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摘要

Based on the Chaboche unified visco-plastic constitutive model, a visco-plastic constitutive model which can take into account non-proportional hardening was proposed for nickel-base alloy at elevated temperature under multiaxial loading. In the proposed multiaxial visco-plastic constitutive model, the non-proportional hardening is considered as a change of kinematic hardening property. The kinematic hardening parameters which can evolve exponentially with the cumulative plastic strain and rotation factor resulted from loading path were proposed to take into account the non-proportional hardening at high temperature under non-proportional loading. Experimental verification showed that the proposed model can accurately predict the peak stresses and the hysteresis loop compared with the original model during the tension-torsion loading process for nickel-base alloy at elevated temperature under non-proportional loading.
机译：基于Chaboche统一的粘塑料本构型模型，在多轴载荷下提出了一种可以考虑非比例硬化的粘塑料本构模型。 在所提出的多轴粘合塑料本构型模型中，非比例硬化被认为是运动硬化性能的变化。 提出了可以用累积塑性应变和由负载路径产生的旋转因子呈指数演化的运动硬化参数，以考虑在非比例载荷下的高温下的非比例硬化。 实验验证表明，与非比例载荷升高的温度下，所提出的模型可以准确地预测与原始模型相比的峰值应力和滞后回路。

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