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journalTitle=火炸药学报, columnName=null, runingTitle=null, highlight=null, articleAbstract=为分析加载应变率对HTPB复合固体推进剂低温力学性能的影响,在温度-50～25℃及14～200mm/min拉伸速率下开展了固体推进剂的定/变速率单轴拉伸力学性能实验。结果表明,在定速率拉伸下,温度越低,拉伸速率越小,推进剂脱湿现象越严重。推进剂力学性能与温度和应变率具有较强的相关性,最大拉伸强度和弹性模量随应变率增加和温度降低逐渐增大,脱湿应变则相反。低温对推进剂的弹性模量和脱湿应变的影响比应变率的影响更显著,而应变率对最大拉伸强度的影响比温度的影响更显著; 在变速率拉伸下,推进剂力学性能对低温更加敏感,最大拉伸强度和最大拉伸应变都随着温度降低而显著下降; 在-40℃低温下,最大拉伸强度分别从高速率加载时的1.89MPa和2.18MPa降至变速率加载时的1.47MPa和1.60MPa,而最大拉伸应变分别从高速率加载时的61%和70%降至变速率加载时的51%和58%。, authors=null, authorsList=null, authorCompany=null, correspAuthors=null, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, 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