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LOW CYCLE FATIGUE ANALYSIS OF STORAGE CANISTERS DUE TO EXPANSION OF CONTENTS

机译:内容物膨胀引起的储能罐低循环疲劳分析

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摘要

Qualification of storage canisters due to the expansion behavior of plutonium metal during phase transitions requires a combined experimental and analytical modeling effort. Tests were conducted at Los Alamos National Laboratory to define the expansion behavior of plutonium metal during the alpha-beta-gamma phase transitions. Test results showed that the expansion is anisotropic due to the container wall constraint. The plutonium expansion parameters were calculated from test data, and combined with a finite element analysis (FEA) to determine the stress state of the storage canisters. Strain values were computed and compared with the ASME Code secondary and peak stress limits. Since the applied expansion strain exceeds the strain of 10 cycles in the ASME Code design fatigue curve, the ASME Code design fatigue curve was extended to values below 10 cycles.
机译:由于phase在相变过程中的膨胀行为而导致的储存罐的鉴定要求结合实验和分析建模工作。在洛斯阿拉莫斯国家实验室进行了测试,以定义p金属在α-β-γ相变过程中的膨胀行为。试验结果表明,由于容器壁的约束,膨胀是各向异性的。根据测试数据计算expansion的膨胀参数,并与有限元分析(FEA)结合以确定储罐的应力状态。计算应变值,并将其与ASME规范的次要和峰值应力极限进行比较。由于施加的膨胀应变超过了ASME规范设计疲劳曲线中的10个循环的应变,因此ASME规范设计疲劳曲线扩展到了10个循环以下的值。

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