计算力学学报2016，Vol.33Issue(4)：649-656,8.DOI:10.7511/jslx201604035
压力敏感材料中的空洞长大研究及其在页岩及高分子材料中的应用
Void growth in a pressure-sensitive dilatant solid---applications to shale rocks and polymers
摘要
Abstract
This paper deals with the study of an internally pressurized void whose matrix,such as rock and poly-meric materials,exhibits pressure-sensitive yielding and plastic dilatancy.The macroscopic behaviors of porous solids are studied by numerical axisymmetric spherical and cylindrical unit cell analyses at finite strains subj ected to Cauchy-type internal void pressure.Results show that pressure-sensitivity and internal pressure have a strong influ-ence on void growth and coalescence.For the spherical unit cell,a shift from a general axisymmetric deformation state to uniaxial straining does not occur though it is generally observed to be the onset of void coalescence in cylin-drical unit cell.Furthermore,an upper bound model developed for a porous solid with a pressure-sensitive dilatant matrix is verified by the presented numerical cell analyses at finite strain.关键词
压力敏感/页岩/高分子/空洞长大/内压Key words
pressure sensitivity/shale rocks/polymer/void growth/internal pressure分类
数理科学引用本文复制引用
唐山,郭田福,彭向和..压力敏感材料中的空洞长大研究及其在页岩及高分子材料中的应用[J].计算力学学报,2016,33(4):649-656,8.基金项目
国家千人计划项目 （）
重庆自然科学基金(0211002431039,cstc2013jcyjA50010) （0211002431039,cstc2013jcyjA50010）
国家自然科学基金(11472065,11332013)资助项目 （11472065,11332013）
