Effect of Service Temperature on Mechanical Properties of Adhesive Joints after Hygrothermal Aging

Polyurethane adhesive and aluminum alloy were selected to make adhesive joints. Butt joints tested at different loading angles (0°, 45°, and 90°) using a modified Arcan fixture were selected to represent three stress states (normal stress, normal/shear combined stress, and shear stress, respectively...

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Autores principales:	Wei Tan, Jingxin Na, Zhaofeng Zhou
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	polyurethane adhesive service temperature hygrothermal aging failure mechanism failure criterion Organic chemistry QD241-441
Acceso en línea:	https://doaj.org/article/8cd4f2d1e78e431eb202ca712eaede94
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spelling	oai:doaj.org-article:8cd4f2d1e78e431eb202ca712eaede942021-11-11T18:45:56ZEffect of Service Temperature on Mechanical Properties of Adhesive Joints after Hygrothermal Aging10.3390/polym132137412073-4360https://doaj.org/article/8cd4f2d1e78e431eb202ca712eaede942021-10-01T00:00:00Zhttps://www.mdpi.com/2073-4360/13/21/3741https://doaj.org/toc/2073-4360Polyurethane adhesive and aluminum alloy were selected to make adhesive joints. Butt joints tested at different loading angles (0°, 45°, and 90°) using a modified Arcan fixture were selected to represent three stress states (normal stress, normal/shear combined stress, and shear stress, respectively). Firstly, the accelerated aging tests were carried out on the joints in a hygrothermal environment (80 °C/95% RH). The quasi-static tests were carried out at different temperatures (−40 °C, 20 °C, and 80 °C) for the joints after hygrothermal aging for different periods. The variation rules of the joints’ mechanical properties and failure modes with different aging levels were studied. The results show that the failure load of the joints was obviously affected by stress state and temperature. In the low-temperature test, the failure load of the joints decreased most obviously, and the BJ was the most sensitive to temperature, indicating that the failure load decreased more with the increase of the normal stress ratio in the joint. Through macroscopic and SEM analysis of the failure section, it was found that the hydrolysis reaction of polyurethane adhesive itself and the interface failure of the joints were the main reasons for the decrease of joint strength. The failure models were established to characterize the adhesive structure with different aging levels at service temperature.Wei TanJingxin NaZhaofeng ZhouMDPI AGarticlepolyurethane adhesiveservice temperaturehygrothermal agingfailure mechanismfailure criterionOrganic chemistryQD241-441ENPolymers, Vol 13, Iss 3741, p 3741 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	polyurethane adhesive service temperature hygrothermal aging failure mechanism failure criterion Organic chemistry QD241-441
spellingShingle	polyurethane adhesive service temperature hygrothermal aging failure mechanism failure criterion Organic chemistry QD241-441 Wei Tan Jingxin Na Zhaofeng Zhou Effect of Service Temperature on Mechanical Properties of Adhesive Joints after Hygrothermal Aging
description	Polyurethane adhesive and aluminum alloy were selected to make adhesive joints. Butt joints tested at different loading angles (0°, 45°, and 90°) using a modified Arcan fixture were selected to represent three stress states (normal stress, normal/shear combined stress, and shear stress, respectively). Firstly, the accelerated aging tests were carried out on the joints in a hygrothermal environment (80 °C/95% RH). The quasi-static tests were carried out at different temperatures (−40 °C, 20 °C, and 80 °C) for the joints after hygrothermal aging for different periods. The variation rules of the joints’ mechanical properties and failure modes with different aging levels were studied. The results show that the failure load of the joints was obviously affected by stress state and temperature. In the low-temperature test, the failure load of the joints decreased most obviously, and the BJ was the most sensitive to temperature, indicating that the failure load decreased more with the increase of the normal stress ratio in the joint. Through macroscopic and SEM analysis of the failure section, it was found that the hydrolysis reaction of polyurethane adhesive itself and the interface failure of the joints were the main reasons for the decrease of joint strength. The failure models were established to characterize the adhesive structure with different aging levels at service temperature.
format	article
author	Wei Tan Jingxin Na Zhaofeng Zhou
author_facet	Wei Tan Jingxin Na Zhaofeng Zhou
author_sort	Wei Tan
title	Effect of Service Temperature on Mechanical Properties of Adhesive Joints after Hygrothermal Aging
title_short	Effect of Service Temperature on Mechanical Properties of Adhesive Joints after Hygrothermal Aging
title_full	Effect of Service Temperature on Mechanical Properties of Adhesive Joints after Hygrothermal Aging
title_fullStr	Effect of Service Temperature on Mechanical Properties of Adhesive Joints after Hygrothermal Aging
title_full_unstemmed	Effect of Service Temperature on Mechanical Properties of Adhesive Joints after Hygrothermal Aging
title_sort	effect of service temperature on mechanical properties of adhesive joints after hygrothermal aging
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/8cd4f2d1e78e431eb202ca712eaede94
work_keys_str_mv	AT weitan effectofservicetemperatureonmechanicalpropertiesofadhesivejointsafterhygrothermalaging AT jingxinna effectofservicetemperatureonmechanicalpropertiesofadhesivejointsafterhygrothermalaging AT zhaofengzhou effectofservicetemperatureonmechanicalpropertiesofadhesivejointsafterhygrothermalaging
_version_	1718431713264140288

Effect of Service Temperature on Mechanical Properties of Adhesive Joints after Hygrothermal Aging

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