淀粉基API胶合木胶接结构破坏模式及失效机理

以淀粉基水性高分子异氰酸酯（API）胶合木胶接结构为研究对象，以胶接的压缩剪切强度为评估指标，通过加速湿热老化试验对胶接结构的破坏模式和失效机理进行了研究。结果表明：胶接结构的断裂性质为韧性断裂，且随着老化时间的增加，其破坏模式为由内聚破坏向内聚破坏＋界面破坏转变。在湿热老化试验前期温度对压缩剪切试样性能起主要作用，在老化后期湿度起主要作用。...

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Bibliographic Details
Published in中国工程科学 Vol. 16; no. 4; pp. 40 - 44
Main Author 时君友 徐文彪 王淑敏
Format Journal Article
LanguageChinese
Published 中国工程院战略咨询中心 01.04.2014
高等教育出版社有限公司
北华大学木质材料科学与工程吉林省重点实验室,吉林吉林,132013
Subjects
加速湿热老化
断裂性质
破坏模式
胶接结构
破坏模式
加速湿热老化
断裂性质
胶接结构
bonding structure
accelerated aging
damage mode
fracture character
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ISSN1009-1742
2096-0034

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Summary:以淀粉基水性高分子异氰酸酯（API）胶合木胶接结构为研究对象，以胶接的压缩剪切强度为评估指标，通过加速湿热老化试验对胶接结构的破坏模式和失效机理进行了研究。结果表明：胶接结构的断裂性质为韧性断裂，且随着老化时间的增加，其破坏模式为由内聚破坏向内聚破坏＋界面破坏转变。在湿热老化试验前期温度对压缩剪切试样性能起主要作用，在老化后期湿度起主要作用。
Bibliography:bonding structure;accelerated aging;fracture character;damage mode
Shi Junyou, Xu Wenbiao, Wang Shumin （Beihua University Wood Material Science and Engineering Key Laboratory of Jilin Province, Jilin, Jilin 132013, China）
11-4421/G3
The starch-based aqueous polymer isocycante（API）gluelam bonding as the re-search object,with tensile shear strength as a key evaluation index,accelerated aging tests on gluelam bonding to study damage mode and failure mechanism of the bonding The results show that：the adhesive fracture properties of ductile fracture structure,and with the increase of ag-ing time,the damage mode of the bonding transforms form cohesion damage mode to the inte-grated mode of cohesion damage and interface damage. In the early stage of the aging tests,the effect of temperature on the tensile shear strength is more important;however,with the in-crease of aging time,the effect of humidity on tensile shear strength becomes more important.
ISSN:1009-1742
2096-0034