A high-throughput technique to evaluate the probability distribution of strength of adhesively bonded joints after moisture absorption

IF 2.9 4区 材料科学 Q2 ENGINEERING, CHEMICAL
Chao Kang, Ming Ji, Yu Sekiguchi, Masanobu Naito, Chiaki Sato
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Abstract

The reliability of adhesive bond strength influences the applicability of structural adhesives in industries. The statistical probability distribution of the strength of adhesive joints is an essential indicator when designing and choosing adhesives. In this study, we experimentally studied the probability distribution of the strength of adhesive joints. The strength data were collected using a novel high-throughput technique consisting of a sample preparation method and shear testing device. Numerous cylindrical butt shear-joint specimens were prepared by mechanical machining and tested using a self-developed shear testing device. The effect of moisture absorption by the adhesive was specifically considered. The probability distribution of the shear strength of the epoxy adhesive joints was characterized using five probability distribution functions: Normal, Lognormal, Exponential, Weibull, and Gamma. Quantile – quantile plots were employed to determine the suitability of each distribution function. The results suggested that the Weibull and Normal distributions were best suited for describing the probability distribution of the strength of the epoxy adhesive joints. The Weibull distribution is particularly suitable for brittle epoxy adhesives. Moisture absorption reduced both the mean and variance of the shear strength, which might be attributed to the plasticization of the adhesives. The high-throughput method proposed in this study significantly improved the efficiency of testing adhesive joints. It not only contributes to the study of the strength distributions of adhesive joints but also helps to shorten the research and development cycle of new adhesives by facilitating rapid strength evaluation.
一种评估粘接接头吸湿后强度概率分布的高通量技术
胶粘剂结合强度的可靠性影响着结构胶粘剂在工业上的适用性。粘接接头强度的统计概率分布是设计和选择胶粘剂的重要指标。在本研究中,我们实验研究了粘接接头强度的概率分布。采用一种新型的高通量技术收集强度数据,该技术由样品制备方法和剪切测试装置组成。采用机械加工方法制备了大量圆柱对接剪切接头试件,并利用自行研制的剪切试验装置进行了试验。具体考虑了胶粘剂吸湿的影响。采用正态、对数正态、指数、威布尔和伽玛5种概率分布函数表征环氧胶合接头抗剪强度的概率分布。分位数-分位数图用于确定每个分布函数的适用性。结果表明,威布尔分布和正态分布最适合描述环氧胶合接头强度的概率分布。威布尔分布特别适用于脆性环氧胶粘剂。吸湿降低了抗剪强度的平均值和方差,这可能与胶粘剂的塑化有关。本研究提出的高通量方法显著提高了粘合接头的检测效率。它不仅有助于研究胶粘剂接头的强度分布,而且有助于通过快速评估强度来缩短新型胶粘剂的研发周期。
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来源期刊
Journal of Adhesion
Journal of Adhesion 工程技术-材料科学:综合
CiteScore
5.30
自引率
9.10%
发文量
55
审稿时长
1 months
期刊介绍: The Journal of Adhesion is dedicated to perpetuating understanding of the phenomenon of adhesion and its practical applications. The art of adhesion is maturing into a science that requires a broad, coordinated interdisciplinary effort to help illuminate its complex nature and numerous manifestations.
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