CONSTITUTIVE-EQUATIONS FOR NONPROPORTIONAL CYCLIC ELASTOVISCOPLASTICITY
CONSTITUTIVE-EQUATIONS FOR NONPROPORTIONAL CYCLIC ELASTOVISCOPLASTICITY
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DOI：
10.1115/1.3225985
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发表时间：
1987-10-01
影响因子：
1.2
通讯作者：
MARQUIS, D
中科院分区：
文献类型：
--
作者：
BENALLAL, A;MARQUIS, D
本文研究金属材料在一般复杂载荷作用下的力学行为。一个完整的实验研究进行展示这种行为的主要特征。非比例加载的特点是与比例加载相比有一个附加的硬化。这种硬化被观察到是强烈依赖于加载路径，可以恢复时，非比例性降低。它示出了一个经典的弹粘塑性模型失败时，应用到复杂的负载下的响应预测。通过对建立模型的假设条件的考察，了解了模型的不足之处，并根据实验方案，导出了非比例加载下循环弹粘塑性的一个简单的本构模型。该模型被证明给非常复杂的测试的预测良好的结果。
This paper is concerned with the behavior of metallic materials under general complex loadings. A complete experimental investigation is carried out to exhibit the main features of this behavior. Nonproportional loadings are characterized by an additional hardening when compared to proportional loadings. This hardening is observed to be strongly dependent on the loading path and can be recovered when the nonproportionality decreases. It is shown that a classical model of elasto-viscoplasticity fails when applied to the prediction of responses under complex loadings. The examination of the assumptions on which the model is built allows to understand its deficiencies and, on the basis of an experimental program, a simple constitituve model is derived for cyclic elastoviscoplasticity under nonproportional loadings. This model is shown to give good results for the prediction of very complex tests.