文章导读
总览 评价 许阳阳 ， 方国东 * ， 洪长青 ， 易法军 ， 梁军 （ 哈尔滨工业大学特种环境复合材料技术国防科技重点实验室； ） 摘要： 对轻质碳酚醛复合材料开展了单侧氧乙炔辐射热流条件下烧蚀实验，通过数字图像相关系统（DIC系统）对试样中的表面热变形进
许阳阳， 方国东*， 洪长青， 易法军， 梁军
（
哈尔滨工业大学特种环境复合材料技术国防科技重点实验室； ）
摘要：
对轻质碳酚醛复合材料开展了单侧氧乙炔辐射热流条件下烧蚀实验，通过数字图像相关系统（DIC系统）对试样中的表面热变形进行测量，距离试样加热表面在试样不同深度预埋热电偶以测量在烧蚀过程中材料中的温度时间历程，最后对材料的烧蚀形貌和微观结构进行了观测和分析。在一定热流密度条件下对材料进行辐射加热100s后，试样表面后退1.5mm；越靠近加热面材料的孔隙率越大；距离试件加热端30mm处的峰值温度为464.1℃，表明该材料具有优异的防隔热性能；通过DIC方法获得试样加热结束时刻位移场分布，距离加热端4.1mm处的位移绝对值为1.33mm；沿着试件加热方向位移呈现非线性变化。?????
关键词：
轻质碳酚醛复合材料；烧蚀；DIC方法；热电偶；位移场
XU Yangyang， FANG Guodong*， HONG Changqing， YI Fajun， LIANG Jun
（
Science and Technology on Advanced Composites in Special Environments Key Laboratory, Harbin Institute of Technology； ）
Abstract：
In this paper, the ablation experiment for low-density carbon/phenolic composites was conducted by using oxygen acetylene radiation heating system. The thermal deformation of specimen surface was measured by digital image correlation system (DIC). The real-time temperature history of specimens was monitored by the thermocouple placed the different depth from heating surface of specimen. The ablation morphology and microstructure of the composites after heating experiment were observed and analyzed. It is found that the recession displacement of the composite under the condition of 100s radition heating process is 1.5 mm. The porosity of the composites near the heating surface becomes large. The peak temperature of the composites from the heating surface 30mm reached 464.1℃, which represents the composites with good thermal insulation performances. Displacement field distribution of samples was obtained by the digital image correlation (DIC) method, the displacement of the distance from the heating surface 4.1 mm was 1.33mm,and decreased nonlinearly along the heating direction.
Tag：
点此返回栏目查看更多>>>参考论文
