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粘结层厚度对结构丙烯酸胶粘剂接头疲劳裂纹扩展的影响

Effect of Bond-Line Thickness on Fatigue Crack Growth of Structural Acrylic Adhesive Joints.

作者信息

Sekiguchi Yu, Sato Chiaki

机构信息

Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Yokohama 226-8503, Kanagawa, Japan.

出版信息

Materials (Basel). 2021 Mar 31;14(7):1723. doi: 10.3390/ma14071723.

DOI:10.3390/ma14071723
PMID:33807416
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8037920/
Abstract

With an increasing demand for adhesives, the durability of joints has become highly important. The fatigue resistance of adhesives has been investigated mainly for epoxies, but in recent years many other resins have been adopted for structural adhesives. Therefore, understanding the fatigue characteristics of these resins is also important. In this study, the cyclic fatigue behavior of a two-part acrylic-based adhesive used for structural bonding was investigated using a fracture-mechanics approach. Fatigue tests for mode I loading were conducted under displacement control using double cantilever beam specimens with varying bond-line thicknesses. When the fatigue crack growth rate per cycle, /, reached 10 mm/cycle, the fatigue toughness reduced to 1/10 of the critical fracture energy. In addition, significant changes in the characteristics of fatigue crack growth were observed varying the bond-line thickness and loading conditions. However, the predominance of the adhesive thickness on the fatigue crack growth resistance was confirmed regardless of the initial loading conditions. The thicker the adhesive bond line, the greater the fatigue toughness.

摘要

随着对胶粘剂需求的不断增加，接头的耐久性变得至关重要。胶粘剂的抗疲劳性能主要针对环氧树脂进行了研究，但近年来许多其他树脂已被用于结构胶粘剂。因此，了解这些树脂的疲劳特性也很重要。在本研究中，采用断裂力学方法研究了一种用于结构粘结的双组分丙烯酸基胶粘剂的循环疲劳行为。使用具有不同粘结线厚度的双悬臂梁试样，在位移控制下进行了I型加载的疲劳试验。当每循环的疲劳裂纹扩展速率/达到10毫米/循环时，疲劳韧性降低到临界断裂能量的1/10。此外，观察到疲劳裂纹扩展特性随粘结线厚度和加载条件的变化而有显著变化。然而，无论初始加载条件如何，都证实了胶粘剂厚度对疲劳裂纹扩展阻力的主导作用。胶粘剂粘结线越厚，疲劳韧性越大。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/811c/8037920/e50c859af830/materials-14-01723-g008.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/811c/8037920/a5fd5be6e086/materials-14-01723-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/811c/8037920/098f68892f77/materials-14-01723-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/811c/8037920/e50c859af830/materials-14-01723-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/811c/8037920/d1687191b092/materials-14-01723-g001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/811c/8037920/d3fb6c9afc02/materials-14-01723-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/811c/8037920/a5fd5be6e086/materials-14-01723-g006.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/811c/8037920/e50c859af830/materials-14-01723-g008.jpg

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本文引用的文献

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Requirements and Variability Affecting the Durability of Bonded Joints.影响粘结接头耐久性的要求和变异性
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Improvement of a Cohesive Zone Model for Fatigue Delamination Rate Simulation.用于疲劳分层速率模拟的内聚区模型的改进
Materials (Basel). 2019 Jan 7;12(1):181. doi: 10.3390/ma12010181.
暴露于盐环境中的复合材料粘接接头在静态和疲劳载荷下的II型分层
Materials (Basel). 2023 Dec 12;16(24):7606. doi: 10.3390/ma16247606.
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Enhancing Fatigue Life and Strength of Adhesively Bonded Composite Joints: A Comprehensive Review.提高胶粘复合材料接头的疲劳寿命和强度：全面综述
Materials (Basel). 2023 Sep 28;16(19):6468. doi: 10.3390/ma16196468.
5
Creep Crack Growth Behavior during Hot Water Immersion of an Epoxy Adhesive Using a Spring-Loaded Double Cantilever Beam Test Method.采用弹簧加载双悬臂梁试验方法研究环氧胶粘剂在热水浸泡下的蠕变裂纹扩展行为
Materials (Basel). 2023 Jan 8;16(2):607. doi: 10.3390/ma16020607.