蓝田花岗岩冲击压缩特性的实验研究
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摘要
岩石在高应变率下的动力学性能研究在国防和民用建设中具有重要意义。在57mm气炮上利用电磁法研究了蓝田花岗岩冲击压缩特性。采用正向冲击法和反向冲击法两种实验构形,冲击压力范围为78MPa～5.2GPa。蓝田花岗岩声学特性和动力学特性与其他花岗岩有较大差别,其Hugoniot曲线在约0.47GPa时有明显的拐折,这与球形波实验的相应结果基本一致。由于蓝田花岗岩具有明显的铁磁效应,在冲击波作用下激发强电磁场,这会严重干扰测量波形。反向冲击法可以有效地减少这种干扰,其在研究岩石类特殊材料的冲击压缩特性时有明显的优点。
The testing study on dynamic property of rock under high strain rate is of important significance for national defence and civil construction. The testing data of Hugoniot are presented for Lantian granite under pressure range of approximately 78 MPa to 5.2 GPa. The test was conducted on a single-stage light gas gun of 57 mm. The general impact experimental configuration and the reverse ballistic experimental configuration with electro-magnetic particle velocity gage were used to obtain shock velocity and particle velocity. Lantian granite is different with others in acoustics and dynamics. There is a corner for the relation between shock velocity and particle velocity under about 0.47 GPa, and the result is well in accord with that of spherical divergent wave in Lantian granite. The ferromagnetic effect of Lantian granite is very strong. Electromagnetic field is excitated by shock wave. The electromagnetic field can severely disturb particle velocity signals. The reverse ballistic experimental configuration can effectively decrease the disturbanc and it is a very good method for testing study on the dynamic property of rock
The testing study on dynamic property of rock under high strain rate is of important significance for national defence and civil construction. The testing data of Hugoniot are presented for Lantian granite under pressure range of approximately 78 MPa to 5.2 GPa. The test was conducted on a single-stage light gas gun of 57 mm. The general impact experimental configuration and the reverse ballistic experimental configuration with electro-magnetic particle velocity gage were used to obtain shock velocity and particle velocity. Lantian granite is different with others in acoustics and dynamics. There is a corner for the relation between shock velocity and particle velocity under about 0.47 GPa, and the result is well in accord with that of spherical divergent wave in Lantian granite. The ferromagnetic effect of Lantian granite is very strong. Electromagnetic field is excitated by shock wave. The electromagnetic field can severely disturb particle velocity signals. The reverse ballistic experimental configuration can effectively decrease the disturbanc and it is a very good method for testing study on the dynamic property of rock
引文
1 王占江,李孝兰,张若棋等.固体介质中球形发散波的实验装置[J].爆炸与冲击,2000,20(2) :103～109
2 信礼田,刘建武.何翔.高应变速率下石灰岩的力学特性[J].岩石力学与工程学报,1998,17(增):780～783
3 尚嘉兰.沈乐天,赵宇辉等.Bukit Timah花岗岩的动态本构关系[J].岩石力学与工程学报,1998,17(6) :634～641
4 赵坚,赵宇辉,尚嘉兰等.Bukit Timah花岗闪长岩的Hugoniot状态方程[J].岩土工程学报,1999,21(3) :315～318
5 尚嘉兰,沈乐天,赵坚.Bukit Timah粗粒花岗闪长岩中应力波的传播衰减规律[J].岩石力学与工程学报,2001,20(2) :212～215
6 Grady D E. Impact compression properties of concrete[R].SAND-93-0013C,1993
7 王占江.李焰,张德志等.用气炮研究岩石类材料冲击压缩特性的反向冲击法[J].岩土力学,2001,22(4) :399～402
8 Barker L M. Hollenlach R E. Shock-wave studies of PMMA. fused silica. and sapphire[J]. J. Appl. Phys., 1970, 41(10) : 4 208～4 226
9 徐小荷,邢国军,王标.岩石中应变波激发的电磁效应[J].地震学报;1998,20(1) ;96～100
10 王占江,褚玉成,唐润棣.方解石晶体的低压冲击压缩特性[J].辽宁工程技术大学学报,2001,20(4) :450～452
2 信礼田,刘建武.何翔.高应变速率下石灰岩的力学特性[J].岩石力学与工程学报,1998,17(增):780～783
3 尚嘉兰.沈乐天,赵宇辉等.Bukit Timah花岗岩的动态本构关系[J].岩石力学与工程学报,1998,17(6) :634～641
4 赵坚,赵宇辉,尚嘉兰等.Bukit Timah花岗闪长岩的Hugoniot状态方程[J].岩土工程学报,1999,21(3) :315～318
5 尚嘉兰,沈乐天,赵坚.Bukit Timah粗粒花岗闪长岩中应力波的传播衰减规律[J].岩石力学与工程学报,2001,20(2) :212～215
6 Grady D E. Impact compression properties of concrete[R].SAND-93-0013C,1993
7 王占江.李焰,张德志等.用气炮研究岩石类材料冲击压缩特性的反向冲击法[J].岩土力学,2001,22(4) :399～402
8 Barker L M. Hollenlach R E. Shock-wave studies of PMMA. fused silica. and sapphire[J]. J. Appl. Phys., 1970, 41(10) : 4 208～4 226
9 徐小荷,邢国军,王标.岩石中应变波激发的电磁效应[J].地震学报;1998,20(1) ;96～100
10 王占江,褚玉成,唐润棣.方解石晶体的低压冲击压缩特性[J].辽宁工程技术大学学报,2001,20(4) :450～452
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