新型碳酚醛的电子束辐射热激波传播实验研究.pdf

第十一届全国实验力学学术会议 大连 2005 新型碳酚醛的电子束辐射热激波传播实验研究 1，2 1 1 1 林鹏 ，王等旺 ，李焰 ，李孝兰 （1.西北核技术研究所，西安 710024；2.中国科技大学力学与机械工程系，安徽合肥 230027） 摘要：采用保护环式石英晶体和 PVDF 压电测量技术，在“闪光 II 号”脉冲电子束加速器上，进行了 新型碳酚醛复合材料的热激波传播实验研究；利用波传播过程的不可逆能量损耗，推导了热激波传播 2 衰减解析公式。结果表明： (1) 在电子束能注量为 352 ～590J/cm，对厚度为 9mm 的碳酚醛靶，其热 激波应力峰值为 0.073～0.425GPa；(2) 在上述能注量范围内，碳酚醛的质量亏损面密度、应力峰值 与电子束能注量之间皆有线性关系成立；(3) 在烧蚀面附近，热激波在靶中以指数规律衰减，实验结 果和解析公式结果具有较好的一致性;(4) 碳酚醛的平均热烧蚀率为 0.19mg/J，平均喷发能为 5.31kJ/g。 关键词：热激波；PVDF；碳酚醛；喷发能；热烧蚀率 Experimental Studies on Propagation of Thermal Shock Waves Induced by Electron Beam Radiation in C/PH Composite 1，2 1 1 1 LIN Peng , WANG Deng-wang , LI Yan , LI Xiao-lan (1.Northwest Institute of Nuclear Technology, Xi’an 710024, China；2. Department of Mechanics and Mechanism Engineering, USTC, Hefei 230027 ) Abstract: Propagation and Attenuation of thermal shock wave in C/PH composite irradiated by pulsed electron beam were studied on “FLASH II” accelerator. In experiments, the guard-ring quartz and PVDF piezoelectric measuring techniques were used. The equation for the attenuation of amplitude of thermal shock wave is derived and evaluated by using irreversible energy loss. Experimental results show that: (1) When 2 electron beam energy fluxes are in the range from 352 to 590 J/cm , for C/PH composite with thickness of 9 mm, the peak amplitude of stress are in the range from 0.073 to 0.425GPa. (2) The intensity of shock waves and mass loss are nearly proportional to energy flux. (3)