摘要
以云杉-松木-冷杉(SPF)防腐胶合木为研究对象,运用双悬臂梁(DCB)及端部切口三点弯曲(ENF)试验法研究防腐胶合木层间界面断裂韧性。结果表明:铜唑防腐剂不利于层板复合,防腐胶合木层间界面Ⅰ型及Ⅱ型断裂韧性均明显降低,降低幅度分别为18.0%和11.5%;层板表面刨切处理可提高防腐胶合木的层间界面断裂韧性;胶黏剂对层板刨切处理后的防腐胶合木界面断裂韧性影响较小,间苯二酚-甲醛胶黏剂优于单组分聚氨酯胶黏剂;数字图像法(DIC)反映出层间断裂过程均为脆性断裂。Ⅰ型及Ⅱ型断裂韧性均可作为防腐胶合木层间界面复合质量评价参数。
This study considers spruce-pine-fir(SPF)anticorrosive glulam as the research object,and uses double cantilever beam(DCB)and end notched flexure(ENF)as the test methods to study the fracture toughness of the interlayer in anticorrosive glulam.The results indicate that the copper azole preservative is not conducive for the composition of laminates,and the fracture toughness of the modeⅠand modeⅡof the anti-corrosion glulam interlayer interface is significantly reduced by 18.0%and 11.5%,respectively.The surface cutting treatment of the laminate can improve the anti-corrosion gluing and the interlayer fracture toughness of wood.The adhesive does not have significant effect on the fracture toughness of the anticorrosive glulam.After the plywood is sliced,the resorcinol-formaldehyde adhesive is better than the one-component polyurethane adhesive.The digital image correlation(DIC)indicates that the interlaminar fracture toughness is brittle,and both modeⅠand modeⅡfracture toughness can be used as the composite quality evaluation parameters of the anti-corrosion glulam interlayer interface.The test results provide a reference for further research on the fracture toughness and damage resistance of the anti-corrosion glulam wood.
作者
陈泽华
杨小军
张璐
董浩然
赵琦
CHEN Zehua;YANG Xiaojun;ZHANG Lu;DONG Haoran;ZHAO Qi(College of Materials Science and Engineering,Nanjing Forestry University,Nanjing,Jiangsu 210037,China;Jingjiang National Forestry Products Co.,Ltd.,Jingjiang,Jiangsu 214500,China)
出处
《森林与环境学报》
CSCD
北大核心
2021年第2期219-224,共6页
Journal of Forest and Environment
基金
国家自然科学基金项目(31300484)
江苏省泰州市双创人才项目(2020090120)。
关键词
防腐处理
胶合木
层间界面
断裂韧性
anti-corrosive
glulam
interlayer interface
fracture toughness
