DAMAGE CONTROL DURING DRYING PROCESS FOR HIGHLY SHRINKABLE MATERIALS

摘要：

　　Alumina gels have high initial moisture content and their shrinkage during drying is generally very large (50%).During this volume decrease,tensile and compressive stresses take place and cracks can appear and lead to breaks.The 3D numerical model takes into account two kinds of moisture transport rates: firstly,periphery evaporation of solvent with ideal shrinkage where the material remains saturated.Secondly,the evaporation takes place inside the body and the material does not still exhibit shrinkage.The mathematical model involves a damage law to assess the probability of cracks.Air temperature and its relative humidity are driven to minimize the damage.

关键词： Drying shrinking material nanopore evaporation damage control alumina gel

作者: J.Brac W.Jomaa C.Pommier L.Rouleau

作者单位: I F P Energies Nouvelles 1,4 avenue de Bois-Préau,92852 Rueil-Malmaison,,France Université Bordeaux I,Laboratoire TREFLE Esplanade des Arts et Métiers,33405 Talence,France Axens,BP8,30340 Salindres,France IFP Energies Nouvelles,BP3,69360 Solaize,France

会议类型: 国际会议

会议名称: The 18th International Drying Symposium Conference(第十八届国际干燥学术大会(IDS2012))

会议地点: 厦门

会议语种:英文

页码: 1-7

在线出版日期: 2012-01-11（万方平台首次上网日期，不代表论文的发表时间）