冲击压缩下PMMA的响应和光学特性

郝龙; 王翔; 王青松; 康强; 黄金

doi:10.11858/gywlxb.2017.05.011

冲击压缩下PMMA的响应和光学特性

doi: 10.11858/gywlxb.2017.05.011

郝龙^1,,
王翔^{1, 2,*, ,},
王青松^{1, 2},
康强¹,
黄金¹

1.
中国工程物理研究院流体物理研究所，四川绵阳 621999
2.
中国工程物理研究院流体物理研究所冲击波物理与爆轰物理实验室，四川绵阳 621999

详细信息

作者简介:
郝龙(1985—)，男，硕士研究生，主要从事冲击波物理研究.E-mail:lhao05@163.com

通讯作者:
王翔(1968—)，男，硕士，研究员，主要从事动高压物理实验技术研究.E-mail:xiangwang102@126.com

中图分类号: O521.2
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出版历程
- 收稿日期: 2016-10-29
- 修回日期: 2017-01-31

Dynamic Response and Optical Properties of PMMA under Shock Compression

HAO Long^1
,,
WANG Xiang^{1, 2,*
, ,},
WANG Qing-Song^{1, 2},
KANG Qiang¹,
HUANG Jin¹

1.
Institute of Fluid Physics, CAEP, Mianyang 621999, China
2.
National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, CAEP, Mianyang 621999, China

摘要

摘要: 利用二级轻气炮测量了聚甲基丙烯酸甲酯(Polymethylmethacrylate，PMMA)在一维平面冲击压缩条件下的响应和光学特性。采用全光纤激光干涉测试技术(DPS)测量样品在冲击加载下的界面粒子速度和冲击波速度，获得了PMMA材料在冲击压力6~50 GPa区间内的高精度冲击Hugoniot数据，冲击波速度不确定度小于1%。同时获得了冲击压缩条件下PMMA样品材料的高压折射率与密度的变化关系以及界面粒子速度修正系数，并实时观测到了PMMA材料中的表观冲击波速度剖面，讨论了冲击波速度剖面与真实冲击波速度的关系。
- 有机玻璃 /
- 冲击压缩 /
- Hugoniot /
- 多普勒测速系统 /
- 速度修正
Abstract: Symmetric plate impact experiments were performed using a two-stage light gas gun to investigate the dynamic response and optical properties of polymethylmethacrylate (PMMA) under shock loading.The particle velocity of the flyer/sample interface, the shock velocity, and the refractive index of the sample were measured using a Doppler pin system (DPS).The measurements produced accurate Hugoniot data for PMMA, with the uncertainty of the shock velocity below 1%.The velocity correction at 1 550 nm of the wavelength under shock pressures ranging from 6 to 50 GPa was also obtained.The relationship between the refractive index and the density under shock compression was deduced from the measurements.Moreover, the shock velocity was distinctly captured by DPS and its relationship with the actual shock velocity was examined.
- PMMA /
- shock compression /
- Hugoniot /
- Doppler pin system (DPS) /
- velocity correction

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图 1 测量原理示意图

Figure 1. Schematic illustration of the measurement

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图 2 典型DPS实测信号

Figure 2. Typical signal of DPS

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图 3 PMMA的Hugoniot数据

Figure 3. Hugoniot data of PMMA

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图 4 典型速度剖面DPS信号

Figure 4. Typical velocity profile signals of DPS

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图 5 PMMA的折射率与密度的变化关系

Figure 5. Relationship between refractive index and density of PMMA

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图 6 PMMA的u_a-u_p关系

Figure 6. u_a-u_p relationship of PMMA

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图 7 1 550 nm波长下PMMA的速度修正关系

Figure 7. Velocity correction for PMMA at a wavelength of 1 550 nm

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图 8 PMMA的D_a-D关系

Figure 8. D_a-D relationship of PMMA

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表 1 PMMA实验结果

Table 1. Experimental results of PMMA

Exp. No.	w/(km/s)	D/(km/s)	D_a/(km/s)	u_p/(km/s)	u_a/(km/s)	Δu/(km/s)	p/(GPa)	n_H
PMMA-01^(a)	2.353	4.41±0.01	6.508	1.177±0.003	1.185±0.004	0.008±0.005	6.13±0.02	1.66
PMMA-02^(a)	2.884	4.94±0.01	(c)	1.442±0.003	1.461±0.002	0.019±0.004	8.41±0.04	1.68
PMMA-03^(a)	3.724	5.59±0.01	(c)	1.862±0.005	1.890±0.005	0.028±0.007	12.30±0.05	1.72
PMMA-04^(a)	4.083	5.82±0.01	8.613	2.042±0.005	2.076±0.002	0.034±0.005	14.05±0.06	1.74
PMMA-05^(a)	4.523	6.15±0.01	9.100	2.262±0.006	2.292±0.006	0.030±0.008	16.42±0.07	1.76
PMMA-06^(a)	4.836	6.38±0.03	9.463	2.418±0.006	2.447±0.002	0.029±0.006	18.23±0.09	1.77
PMMA-07^(b)	3.170	6.72±0.01	(c)	2.665±0.015	(d)	-	21.14±0.14	-
PMMA-08^(b)	3.754	7.33±0.01	10.839	3.130±0.017	3.144±0.014	0.014±0.022	27.11±0.17	1.84
PMMA-09^(b)	3.795	7.34±0.01	(c)	3.165±0.018	(d)	-	27.42±0.18	-
PMMA-10^(b)	4.075	7.62±0.02	11.250	3.387±0.019	3.396±0.006	0.009±0.020	30.47±0.20	1.87
PMMA-11^(b)	5.731	9.17±0.03	13.613	4.694±0.027	(e)	-	50.84±0.35	-

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