含气多孔介质的卸压破坏及突出的极强破坏准则

DAMAGE OF POROUS MEDIA CONTAINING PRESSURIZED GAS BY UNLOADING AND THE MAXIMUM DAMAGE PRINCIPLE FOR CRITICAL OUTBURST

用简单的一维刚骨架破坏失效模型描述受压含气多孔介质在界面突然卸压下的拉伸破坏，这类破坏具有不发散传播的特性，可用稀疏间断波来表示，即破坏波．存在有极强破坏波，它由类似于定常爆燃的ＣＪ条件确定．提出了临界突出的极强破坏准则．

Damage of porous media containing pressurized gas by unloading is formulated using a simple failure model and neglecting percolation. The damage can be shown to be caused by a discontinuous rarefaction wave—— a “damage wave”. Also, there exists a maximum damage wave,which satisfies C J condition as in the case of steady deflegration.A maximum damage principle for critical outburst is proposed.