高速冲击条件下玻璃中破坏波的损伤累积模拟

基金项目: 国防科技重点实验室基金资助项目(99JS7522JW2001)

A Damage Accumulating Modeling of Failure Waves in Glass under High Velocity Impact

Department of Engineering Mechanics, Chongqing University, Chongqing 400044, P R China

摘要: 分析了玻璃介质在高速冲击条件下低于Hugoniot应力弹性极限时的破坏波现象,在实验现象分析的基础上提出了一种由偏应力冲量决定的损伤累积模型,模型中采用了Heaviside函数来描述材料内部的破坏延迟现象,分析了玻璃介质中破坏层的性质、破坏波的传播机制及其动态特征,并发现了反射稀疏波在破坏层边界再次反射后破坏波传播速度下降的现象。
- 高速冲击 /
- 破坏波 /
- 损伤累积模型
Abstract: The failure wave phenomenon was interpreted in glassmedia under the high velocity impact with the stress levels below the Hugoniot elastic limit. Inview of the plate impact experimental observations a damage-accumulating model predominated by the deviatoric stress impulse was proposed while Heaviside function was adopted in the damage-accumulating model to describe the failure delay inthe interior of materials. Features of the failure layer and propagation mechanism as well as their dynamic characteristics were further presented. The reduction in failure wave propagation speed is pointed out as the reflected rarefaction waves reflect again from the failure layer boundary.
- high velocity impact /
- failure wave /
- damage-accumulating model

[1]	Rasorenov S V, Kanel G I, Fortov V E, et al. The fracture of glass under high-pressure impulsive loading[J]. High Pressure Research,1991,6:225-232.
[2]	Partom Y. Modeling failure waves in glass[J]. Int J Impact Engng,1998,21(9):791-799.
[3]	Espinosa H D, Xu Y P. Micromechanics of failure waves in glass: Ⅰ Experiments[J]. J Am Ceram Soc,1997,80(8):2061-2073.
[4]	Espinosa H D, Xu Y P. Micromechanics of failure waves in glass: Ⅱ Modeling[J]. J Am Ceram Soc,1997,80(8):2074-2085.
[5]	Clifton R J. Analysis of failure waves in glasses[J]. Appl Mech Rev,1993,46(12):540-546.
[6]	HE Hong-liang, JING Fu-qian, JIN Xiao-gang, et al. Compressive failure of brittle materials under shock wave loading[A]. In: Sino-Japanese Symp Deformation/Fracture of Solids[C]. Huangshan/China,1997,81-90.
[7]	HE Hong-liang. Dynamic response and microstructure damage of brittle materials under shock wave compression[D]. Ph D Thesis. Chengdu: Institute of Fluid Physics, CAEP, 1997.
[8]	经福谦. 实验物态方程导引[M]. 北京:科学出版社,1986.
[9]	王礼立. 应力波基础[M]. 北京:国防工业出版社,1985.
[10]	高蕴昕,郑泉水,余寿文. 各向同性弹性损伤的的双标量描述[J]. 力学学报,1996,28(5):542-549.