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首页> 外文会议>International Conference on Mechanical Engineering and Mechanics vol.2; 20051026-28; Nanjing(CN) >Experimental Study on the Hugoniot Equation and the Attenuation of Stress Wave of C/PH
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Experimental Study on the Hugoniot Equation and the Attenuation of Stress Wave of C/PH

机译：Hugoniot方程和C / PH应力波衰减的实验研究

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To measure the Hugoniot equation of composite is a primary problem in the study of thermal shock waves for space vehicles and missiles. However, the equation of composite is much complicated than that of isotropic material since it is direction-dependent. By the consideration of the fact that the external loading for most layered laminar in engineering are perpendicular to the layered plane, the purpose of this research is aimed at the experimental study of the equation of state (EOS) in the direction out of layered plane for a new kind of carhon phenolic (C/PH) composite. The experiments were carried out on one-stage light gas gun (LGG) of Φ57 mm bore and unsymmetrical impact was used in the test, in which the flyer was aluminium and the target was C/PH. The impact velocities of the flyer were controlled in the range of 200～700 m/s and the U-shape particle velocity gauges were used to measure the material velocity and to determine the velocity of shock wave. Hugoniot equation of the new C/PH was obtained by the aid of the experimental data and the jump conditions across the shock front. The attenuation rule for a pulsed wave propagated in C/PH was derived by the analysis of irreversible energy dissipation in the shock loading. Peak stresses of a pulsed wave in C/PH composite at different initial conditions were evaluated. The results of the paper show that: (1) Hugoniot equation of C/PH can be approached fairly by a linear relationship between shock velocity and particle velocity. (2) As a consequence of the decrease of the duration of pulsed wave or the increase of the initial pressure of wave, the attenuation of the shock wave in C/PH is much faster.
机译：测量复合材料的Hugoniot方程是研究航天器和导弹的热冲击波的主要问题。但是，复合方程要比各向同性材料方程复杂得多，因为它与方向有关。考虑到工程中大多数层状层流的外部载荷都垂直于层状平面的事实，本研究的目的是针对状态方程（EOS）沿层状平面外方向的实验研究。一种新型的香椿酚（C / PH）复合材料。实验是在Φ57毫米口径的一级轻型气枪（LGG）上进行的，并且在试验中使用了不对称冲击，其中飞行物为铝，目标为C / PH。飞行器的冲击速度控制在200〜700 m / s范围内，用U型粒子速度计测量材料的速度并确定冲击波的速度。新的C / PH的Hugoniot方程是通过实验数据和整个冲击前沿的跳跃条件获得的。通过分析冲击载荷中不可逆的能量耗散，推导了在C / PH中传播的脉冲波的衰减规律。评价了不同初始条件下C / PH复合材料中脉冲波的峰值应力。论文的结果表明：（1）C / PH的Hugoniot方程可以通过冲击速度与质点速度之间的线性关系来近似求解。 （2）由于脉冲波持续时间的减少或波的初始压力的增加，C / PH中冲击波的衰减要快得多。

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