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.

报告了项目成员对本构方程和寿命预测方法进行评估的基准项目的一些结果，作为单轴应力下的材料行为、塑性-蠕变相互作用条件下的非弹性变形和疲劳蠕变状态下的寿命估算通过指定 600゜C 正火和回火的 2 Cr-1Mo 钢的 10 种，在拉伸（压缩）和扭转的组合应力状态下进行检验。五类问题（简单且循环拉伸或扭转、拉伸蠕变后结合塑性，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以及同相和异相循环应变）为该项目的第一部分建立了，并在第二部分进行了同相和异相疲劳蠕变试验。十个本构模型十四路的非弹性响应预测与相应的实验结果评估了模拟材料实际行为的准确性，并且还绘制了七种方法的估计寿命与观察到的寿命的比较。这里重点关注采用计算的三种方法的寿命估计过程。本构模型的应力-应变响应。

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: 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: "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. 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。