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《刺槐复合结构胶合性能的压痕表征.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第38卷第4期南京林业大学学报(自然科学版)Vol_38.No.42014年7月JournalofNanjingForestryUniversity(NaturalSciencesEdition)Ju1.,2014doi:10.3969/j.issn.1000—2006.2014.04.033杨木/刺槐复合结构胶合性能的压痕表征闫薇,宋氏凤,朱一辛,孙丰文(1.南京林业大学材料科学与工程学院,江苏南京210037;2.越南林业大学,越南河内156207)摘要:以杨木、刺槐及异氰酸酯胶黏剂(EPI)制成胶合构件,进行了胶层剪切强度的测试及在宏观范围
2、内胶合性能的压痕表征。结果表明:刺槐间、杨木间的胶层剪切强度分别为7.9、6.2MPa,杨木与刺槐间胶层剪切强度为5.4~5.7MPa。460N荷载条件下,1.6MPa和1.0MPa胶合压力制备的杨木与刺槐问胶层部位压痕蠕变分别为21.31%和25.37%,杨木间和刺槐间的压痕蠕变差异不显著。杨木/刺槐间胶层部位的塑性变形功与压痕功比值介于杨木间和刺槐间的值,EPI胶层对杨木抗塑性变形有贡献但对刺槐的作用不明显。杨木与刺槐间胶层部位的名义硬度比杨木与杨木间大,比刺槐与刺槐间小。关键词:杨木;刺槐;复合结构;胶层剪切强度;压痕蠕变;压痕功;名义硬度
3、中图分类号:$781文献标志码:A文章编号:1000-2006(2014)04-0168-05Shearstrengthonadhesivelayerandindentationcharacterizationofpoplar/blacklocustcompositestructureYANWei,TongThiphuong一,ZHUYixinh,SUNFengwen(1.CollegeofMaterialsScienceandEngineering,NanjingForestryUniversity,Nanjing210037,China;2.
4、VietnamForestryUniversity,Hanoi156207,Vietnam)Abstract:Theshearstrengthandmacroindentationcharacterizationonbondingpartsofgluingspecimenthatmadefrompoplar,blacklo6ustandemulsionpolymer—isocyanateadhesive(EPI)weretestedandcharacterized.Theresuhsshowedthatshearstrengthofblacklo
5、custcompositeandpoplarcompositewere7.9MPaand6.2MParespectively,andtheshearstrengthrangeofblacklocust/poplarcompositewasfrom5.4to5.7MPa.Theindentationcreepattestforce460Nonthebondingpartsofpoplar/blacklocustcompositemadeunderbondingpressures1.6MPaand1.0MPawere21.31%and25.37%,r
6、espectively,andtherewasnosignificantdifferencebetweenblacklocustcompositeandpoplarcomposite.Theratioofplasticdeformationindentationworktototalindentationworkonthebondingpartsofpoplar/blacklocuscompositewasintherangeofwhichonthebondingpartsofpoplarcompositeandblacklocuscomposi
7、te,theEPIadhe—sivelayercontributedtotheplasticdeformationresistanceofpoplarandnottoblacklOCUS.Thenormalhardnessofthebondingpartofpoplar/blacklocuscompositewashigherthanpoplarandpoplarcomposite,whilelowerthanblackandblacklocuscomposite.Keywords:poplar;blacklocust;compositestru
8、cture;shearstrengthonadhesivelayer;indentationcreep;indentationwork;
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