Evaluation of Inelastic Constitutive Equations under Plasticity-creep Interaction Condition subjected to Multiaxial Stresses

多轴应力塑性-蠕变相互作用条件下非弹性本构方程的评估

• 批准号: 61302036
• 负责人: INOUE Tatsuo
• 金额: $ 8万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Co-operative Research (A)
• 财政年份: 1986
• 资助国家: 日本
• 起止时间: 1986 至 1987
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-61302036/
• 关键词: Constitutive equations; Inelastic meterial behaviour; Plasticity-creep interaction; 寿命評価; 塑性ークリープ相互作用; 非弾性; 多軸応力

Some of the results of the bench mark project on the evaluation of constitutive equations and life prediction methods conducted by the project members are reported. As an extention of the work done for material behavior under uniaxial stress, inelastic deformation under plasticity-creep interaction condition and life estimation in fatigue-creep regime are both examined in combined stress state of tension (compression) and torsion. By specifying normalized and tempered 2 Cr-1Mo steel at 600゜C, ten kinds of problems of five categories (they are simple and cyclic tension or torsion, tensile creep followed by combined plasticity and vice versa, response under cruciform or circular path, mechanical ratcheting under combined stresses, and in-phase and out-of-phase cyclic straining) were established for the first part of the project, and in-phase and out-of-phase fatigue-creep tests were performed in the second part.Predictions of inelastic response by ten constitutive models by fourteen way sare compared with the corresponding experimental results to evaluate the accuracy in simulating the actual behavior of the material, and the estimated lives by seven methods are also plotted in comparison with the observed lives. Here, the emphasis is focused on the life estimation procedure by three methods employing caluclated stress-strain response by the constitutive models.

一些基准项目的本构方程和寿命预测方法的评估结果进行了项目成员的报告。作为单轴应力下材料行为研究的延伸，本文研究了拉（压）扭复合应力状态下塑性-蠕变交互作用下的非弹性变形和疲劳-蠕变联合作用下的寿命估算。通过对2Cr-1 Mo钢600 ℃正火回火的详细分析，（它们是简单的和循环的拉伸或扭转，拉伸蠕变，然后是组合塑性，反之亦然，十字形或圆形路径下的响应，组合应力下的机械棘轮效应，以及同相和异相循环应变），第二部分进行了同相和异相疲劳-蠕变试验，将10种本构模型和14种萨雷方法的非弹性响应预测结果与相应的试验结果进行了比较，以评价其模拟材料实际行为的准确性，并将7种方法的估计寿命与实测寿命进行了比较。重点介绍了三种利用本构模型计算应力应变响应的寿命估算方法。

项目成果

Editor: R. Ohtani, M. Ohnami, T. Inoue: Current Japanese Materials Research High Temperature Creep-Fatigue (Inelastic Constitutive relationship of High Temperature Materials under Plasticity-creep Interaction condition). Elsevier, (1988)

编辑：R. Ohtani、M. Ohnami、T. Inoue：当前日本材料研究高温蠕变疲劳（塑性-蠕变相互作用条件下高温材料的非弹性本构关系）。

Tatsuo Inoue: Proceedings of 9th International Conference on Structural Mechanics in Reactor Technology,Lansanne. (1987)

Tatsuo Inoue：第九届反应堆技术结构力学国际会议论文集，Lansanne。

Tatsuo Inoue: "Description of Creep-plasticity Interaction Behaviour of High Temperature Steels under Combined Tension and Torsion" Proceedings of the International Conference on Creep. 453-458 (1986)

Tatsuo Inoue：“联合拉伸和扭转下高温钢的蠕变塑性相互作用行为的描述”国际蠕变会议论文集。

Tatsuo Inoue: Proceedings of 9th International Conference on Structural Nechanics in Reactor Technology,Lansanne. L. 261-266 (1987)

Tatsuo Inoue：第九届反应堆技术结构力学国际会议论文集，Lansanne。

Tatsuo Inoue: Proceedings of 9th International Conference on Structural Nechanics in Reactor Technology,Lansanne. L. 15-26 (1987)

Tatsuo Inoue：第九届反应堆技术结构力学国际会议论文集，Lansanne。