多孔材料中应力波的传播  

Propagation of stress wave in porous material

作　　者：赵凯[1] 王肖钧[1] 刘飞[2] 罗文超[1] 

机构地区：[1]中国科学技术大学,安徽合肥230027 [2]总参工程兵科研三所,河南洛阳471000

出　　处：《爆炸与冲击》2011年第1期107-112,共6页Explosion and Shock Waves

基　　金：国家自然科学基金项目(50802092);国家自然科学基金重点项目(10632080)~~

摘　　要：针对多孔泡沫混凝土实验应力应变曲线的基本特点,提出并建立了一种可以考虑孔隙压实过程的材料本构模型及其数学形式。通过典型算例,分析了应力波在多孔材料中传播的耗散效应,指出多孔材料中的孔隙在被压实过程中能有效吸收应力波能量、降低应力波强度,在引起应力波衰减的诸因素中,孔隙压实所起的作用更大更显著。Based on the stress-strain curves of foam-concrete,a constitutive model to describe the process of pore collapse of porous material is proposed.The behavior of uniaxial strain wave propagated in foam-concrete was numerically simulated,and the attenuation effects of the peak stress and the peak energy of the stress waves were studied.The results show that the foam-concrete has strong capability to absorb the stress wave in the stage of pore collapse,and the factor caused by pore collapse is the most important and significant factor leading to the stress wave attenuation.

关 键 词：固体力学 本构耗散 应力波 泡沫混凝土 多孔 孔隙 

分 类 号：O347.4[理学—固体力学]