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北京石油化工学院2026年研究生招生接收调剂公告
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应用理论解析与ANSYS有限元软件模拟分析了xx体系不同温度下的应力分布状态,理论解析与有限元分析结果基本一致。在涂层的三层结构中,外层和基体的面内应力(。。。)与离面应力(。。。)均处于压应力状态,而中间层和内层面内应力为拉应力,离面应力为压应力。xx体系中,涂层与基体面内应力与离面应力都随着温度的降低而降低,而xx1体系中,涂层与基体面内应力与离面应力在降温过程中变化不大并且均小于xx体系,应力缓慢释放。随着涂层厚度的增加,涂层与基体的面内应力、离面应力和等效应力均增加。xx体系在1250℃的氧化过程当中,涂层出现了纵向裂纹并终止与基体与内层界面处,这可能是由于中间层与内层有较大的面内拉应力,基体与内层界面没有横向裂纹,是由于离面应力为压应力所致。xx1体系在500℃的氧化过程当中中间层的拉应力较小,涂层中未出现纵向裂纹。

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zz1ss1mm: 金币+150, 翻译EPI+1, ★★★很有帮助, 多谢 2016-05-13 22:37:52
应用 理论解析 与 ANSYS有限元 软件模拟 分析了xx体系 不同温度下的 应力分布状态,理论解析 与 有限元分析结果 基本一致。在 涂层的 三层结构中,外层 和 基体的 面内应力(。。。)与 离面应力(。。。)均处于 压应力状态,而 中间层 和 内层 面内应力 为 拉应力,离面应力 为 压应力。
Based on theoretical analysis and ANSYS's FEM simulation, we analyzed the stress distribution of xx system at different temperatures, and the theoretical analysis results were basically consistent with FEM results. In the three-layer coating structure, the in-plane stresses (。。。) and out-of-plane stresses (...) of outer layer and matrix were both in compressed stress state; while the in-plane stresses of mid-layer and inner-layer were tensile stress, and their out-of-plane stresses were compressed stress.

xx体系中,涂层与基体 面内应力 与 离面应力 都随着 温度的降低 而降低,而xx1体系中,涂层与基体 面内应力与离面应力在 降温过程中 变化不大 并且 均小于xx体系,应力缓慢释放。随着涂层厚度的增加,涂层与基体的 面内应力、离面应力和等效应力均增加。xx体系 在1250℃的 氧化过程当中,涂层出现了 纵向裂纹 并终止与 基体与内层界面处,这可能是由于 中间层与内层 有较大的 面内拉应力,基体与内层界面 没有 横向裂纹,是由于 离面应力 为 压应力所致。xx1体系在 500℃的 氧化过程 当中 中间层 的拉应力 较小,涂层中 未出现 纵向裂纹。
In xx system, the in-plane stresses and out-of-plane stresses of outer layer and matrix both decreased with the decrease of temperature; while in xx1 system, the in-plane stresses and out-of-plane stresses of outer layer and matrix showed an insignificant decreasing trend with the decrease of temperature, and both stresses were smaller than that of xx system, with stress being released slowly. With the increase of coating thickness, the in-plane stresses, out-of-plane stresses, and equivalent stresses of coating and matrix all increased. During oxidation process of xx system at 1250℃, longitudinal crack was initiated at coating and finally ended at interface between matrix and inner layer, this was probably due to larger in-plane stress at mid-layer and inner-layer; there was no horizontal crack initiated at interface between matrix and inner-layer, which was because the out-of plane stress was compressed stress. During oxidation process of xx1 system at 500℃, the tensile stress at mid-layer was small, so that there was no longitudinal crack initiated at coating.
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