| 压应力对各向同性细颗粒石墨热膨胀系数的影响 |
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| 引用本文： | 周湘文,王洪涛,董建令,孙立斌,于溯源.压应力对各向同性细颗粒石墨热膨胀系数的影响[J].原子能科学技术,2009,43(Z2). |
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| 作者姓名： | 周湘文 王洪涛 董建令 孙立斌 于溯源 |
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| 作者单位： | 清华大学,核能与新能源技术研究院,北京,100084 |
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| 基金项目： | 国家自然科学基金资助项目，高等学校博士学科点专项科研基金资助项目 |
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| 摘 要： | 采用应变电测法测定了IG-11石墨在不同压应力下的热膨胀系数,研究了压应力对石墨热膨胀系数的影响.不同压缩载荷下的实验结果表明,压应力增大了平行于加载方向的热膨胀系数,并减小了垂直于加载方向的热膨胀系数.同时,随着载荷的不断增加,热膨胀系数的绝对变化量不断增大.此外,卸载后残余应变的存在也对热膨胀系数产生了类似的影响.
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| 关 键 词： | 石墨 热膨胀系数 压应力 应变计 高温气冷堆 |
Effects of Compressive Stresses on Coefficient of Thermal Expansion of Fine-Grained Isotropic Graphite |
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| ZHOU Xiang-wen,WANG Hong-tao,DONG Jian-ling,SUN Li-bin,YU Su-yuan.Effects of Compressive Stresses on Coefficient of Thermal Expansion of Fine-Grained Isotropic Graphite[J].Atomic Energy Science and Technology,2009,43(Z2). |
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| Authors: | ZHOU Xiang-wen WANG Hong-tao DONG Jian-ling SUN Li-bin YU Su-yuan |
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| Abstract: | The strain gauge method was used to measure the coefficient of thermal expansion (CTE) of graphite IG-11 under different compressive loads, and the relationship between compressive stresses and the CTE was analyzed. The experimental results show that compressive stresses increase the CTE parallel to the loading direction and decrease the CTE perpendicular to the loading direction, and the absolute changes increase with increasing applied load. In addition, the residual strain after unloading affects the CTE similarly. |
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| Keywords: | graphite coefficient of thermal expansion compressive stress strain gauge high-temperature gas-cooled reactor |
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