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。
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.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2009年第S2期268-270,共3页
Atomic Energy Science and Technology
基金
国家自然科学基金资助项目(10602029
20070003030)
高等学校博士学科点专项科研基金资助项目(20070003030)
关键词
石墨
热膨胀系数
压应力
应变计
高温气冷堆
graphite
coefficient of thermal expansion
compressive stress
strain gauge
high-temperature gas-cooled reactor
