| 异种材料典型螺纹联接件在预紧和热循环条件下的力学行为 |
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| 引用本文： | 张可丰,谢永诚,梁星筠,杨仁安.异种材料典型螺纹联接件在预紧和热循环条件下的力学行为[J].原子能科学技术,2008,42(Z2). |
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| 作者姓名： | 张可丰 谢永诚 梁星筠 杨仁安 |
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| 作者单位： | 上海核工程研究设计院,上海,200233 |
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| 摘 要： | 在核电厂堆内构件中,如果螺纹联接结构的联接件和基体采用两种不同的材料,由于螺纹联接件材料的热膨胀系数小于基体材料,在升温过程中将产生较大的附加应力.本文以典型螺纹联接件M12为例,模拟堆内热循环载荷条件,对其进行有限元仿真计算分析.在与试验结果及理论分析、经验公式互相比较的基础上,对预紧力矩、螺纹联接件和基体的变形量、联接件在预紧力、升温、降温等不同载荷条件下的应力等参量变化情况进行了研究,为工程设计提供了可靠的依据.
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| 关 键 词： | 异种材料螺纹联接结构 附加应力 热循环 柔度 |
Mechanics Performance of Typical Dissimilar-Material Threaded Fasteners Subjected to Preload and Cyclic Thermal Loads |
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| ZHANG Ke-feng,XIE Yong-cheng,LIANG Xing-yun,YANG Ren-an.Mechanics Performance of Typical Dissimilar-Material Threaded Fasteners Subjected to Preload and Cyclic Thermal Loads[J].Atomic Energy Science and Technology,2008,42(Z2). |
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| Authors: | ZHANG Ke-feng XIE Yong-cheng LIANG Xing-yun YANG Ren-an |
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| Affiliation: | ZHANG Ke-feng,XIE Yong-cheng,LIANG Xing-yun,YANG Ren-an(Shanghai Nuclear Engineering Research , Design Institute,Shanghai 200233,China) |
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| Abstract: | If threaded fasteners used in the reactor interior are of dissimilar-material,considerable additional stress may be induced when being heated due to thermal expansion coefficient difference between bolt material and flange material.In this paper,finite element model of typical dissimilar-material threaded fastener M12 was built and analyzed by simulating cyclic thermal load conditions in the reactor interior.Varieties of parameters,such as deflections of the bolt and flange,stresses under various preloads,h... |
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| Keywords: | threaded fasteners with dissimilar-material additional stress cyclic thermal loads flexibility |
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