摘要
利用概率理论分别建立分层模型和连续接触模型,用以计算含有有机保温组分的多元复合保温材料中出现贯穿性裂缝的概率,并通过燃烧实验来验证模型的计算结果.燃烧实验结果表明连续接触模型的计算结果与实验结果更加吻合.理论分析和燃烧实验结果均表明:对于多元复合保温材料,其有机组分体积分数存在一个极限值,超过极限体积分数后,有机组分相互接触,在保温材料中形成贯穿性裂缝的概率急剧增加,从而导致保温材料耐火性能明显下降;在均匀分布的情况下,有机保温组分的极限体积分数数值与其颗粒形貌参数有关.
The probability of perforative porosity of organic component in the composite system is calculated with the hierarchical model and the continuous contact model.The result of the combustion experiment shows that the continuous contact model provides results more consistent with the experimental data.Theoretical derivation and combustion experiment show that there exists a limit value of organic component＇s volume fraction.Beyond this limit value,the probability of perforative porosity of organic component in the system increases rapidly,which obviously deteriorates the fire endurance of the thermal insulation system.The particle morphology parameters also affect the value of organic component＇s critical volume fraction in the case of uniform distribution.
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2010年第6期1304-1307,共4页
Journal of Southeast University：Natural Science Edition
关键词
有机保温组分
极限体积分数
分层模型
连续接触模型
燃烧
organic insulation component
critical volume fraction
hierarchical model
continuous contact model
combustion
