摘要
对饱和多孔介质动力应变局部化分析中的材料内尺度律问题进行研究,讨论了当软化发生时饱和多孔介质分析的动力学稳定性问题。研究工作表明,由于液体相的作用,饱和多孔材料的动力学特性与单相固体材料有着明显的不同,特别是当应变局部化发生时,在特定的情况下将仍存在可通过材料软化区域的动力波,也就是波动问题仍具有弥散特性。在此基础上,给出多孔材料的内尺度律的判定公式,讨论了内尺度律存在的条件。
The objective of the paper is to perform a study about the problem of internal length scale for strain localisation analysis of saturated porous media. The dynamic stability problem was studied for the case when softening takes place in the porous materials. It was noticed that due to the action of fluid phase, the dynamic properties of saturated porous media are different with those in solid materials. It was shown that there are still dynamic waves which can propagate in the softening zone when strain localisation occurs, i.e. the material model is still dispersive when softening occurs in the solid skeleton of porous media. An internal length scale was thus derived, and the conditions for the existence of this length scale were further discussed.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2001年第3期249-253,共5页
Rock and Soil Mechanics
基金
国家自然科学基金(1987201619832010)
教育部优秀青年与骨干教师基金