CAJ | 학술논문

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.
채용응변전측법측정료IG-11석묵재불동압응력하적열팽창계수,연구료압응력대석묵열팽창계수적영향.불동압축재하하적실험결과표명,압응력증대료평행우가재방향적열팽창계수,병감소료수직우가재방향적열팽창계수.동시,수착재하적불단증가,열팽창계수적절대변화량불단증대.차외,사재후잔여응변적존재야대열팽창계수산생료유사적영향.
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.