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| 1 | 高速液体撞击下固体材料内的应力波传播显示文摘用速度为450 m/s的水射流对具有复杂表面形状的有机玻璃材料进行了冲击实验.试验表面有转角、台阶、缺口、斜坡等.用偏振光光学系统和高速摄影机,观察了固体内应力波的反射、干涉、衍射等传播行为.在进行高速摄影时,采用了每秒106幅和每秒5×10'幅的摄影速度.用速度为850m/s的水射流,试验了侧向射流对有机玻璃板的冲击破坏力.实验发现,固体内的应力波及其传播行为不但与固体的几何形状有关,而且与液体接触固体表面时的状态有关.实验证明,侧向射流具有足够的破坏力,虽然其头部可能是由小尺寸的雾滴组成.实验结果将有助于进一步详细分析在高速液/固撞击时材料的动态受力状态. | 施红辉 J.E.Field | 2004 | 中国科学(G辑)2004，34，5： | 16 |
| 2 | Stress waves propagation in solids under high-speed liquid impact显示文摘An experiment of impact between 450 m/s water jets and polymethylme- thacrylate (PMMA) materials with complex surface geometry was conducted. The testing surfaces were a corner, step change, surface-breaking notch, inclined surface, etc. Stress waves propagation in the solid such as reflection, interference and diffraction was observed using polarized optics and an Imacon high speed camera (operating at both of 106 and 5×105 framing rates per second, fps). A damage test by the impact of the side jetting of an 850 m/s water jet was also carried out. It was found that stress waves propagation in solids depends not only on the surface geometry but also on the contact situation between liquid and solid. It was shown that the side jetting has sufficient damage potential although its head may consist of finer droplets. The results of this paper are useful to further analyze the dynamic stress state of solids under high-speed liquid impact. | J.E.Field | 2004 | Science China(Physics,Mechanics & Astronomy)2004，47，6： | 1 |
| 3 | Hydrodynamic instability experiments with three-dimensional modulations at the National Ignition Facility显示文摘The first hydrodynamic instability growth measurements with three-dimensional(3D) surface-roughness modulations were performed on CH shell spherical implosions at the National Ignition Facility(NIF) [G. H. Miller, E. I. Moses, and C. R. Wuest, Opt. Eng. 43, 2841(2004)]. The initial capsule outer-surface amplitudes were increased approximately four times, compared with the standard specifications, to increase the signal-to-noise ratio, helping to qualify a technique for measuring small 3D modulations. The instability growth measurements were performed using x-ray through-foil radiography based on time-resolved pinhole imaging. Averaging over 15 similar images significantly increased the signal-to-noise ratio, making possible a comparison with 3D simulations. At a convergence ratio of~2.4, the measured modulation levels were~3 times larger than those simulated based on the growth of the known imposed initial surface modulations. Several hypotheses are discussed, including increased instability growth due to modulations of the oxygen content in the bulk of the capsule. Future experiments will be focused on measurements with standard 3D ‘nativeroughness' capsules as well as with deliberately imposed oxygen modulations. | V.A.Smalyuk S.V.Weber D.T.Casey D.S.Clark J.E.Field S.W.Haan A.V.Hamza D.E.Hoover O.L.Landen A.Nikroo H.F.Robey C.R.Weber | 2015 | High Power Laser Science and Engineering2015，3，2： | 0 |
| 4 | BP坑冲蚀涂层保护ZnS红外透射材料显示文摘采用固体粒子连续冲击的方法,研究带有BP涂层的ZnS红外透射材料的冲蚀特性,包括:单个粒子冲蚀坑形貌、Zn元素的X射线分析,失重曲线特性分析等.着重研究了涂层厚度的影响,并在弹塑性分析的基础上就涂层厚度的合理选择进行了讨论. | 高桦 J.E.Field | 1995 | 上海工程技术大学学报1995，9，1： | 0 |
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