scholarly journals Effect of moisture and temperature on thermal and mechanical properties of structural polyurethane adhesive joints

2020 ◽  
Vol 247 ◽  
pp. 112443 ◽  
Author(s):  
Pedro Galvez ◽  
Sara Lopez de Armentia ◽  
Juana Abenojar ◽  
Miguel Angel Martinez
Keyword(s):  
Mechanical Properties ◽  
Adhesive Joints ◽  
Thermal And Mechanical Properties ◽  
Polyurethane Adhesive ◽  
Effect Of Moisture

scholarly journals Anhydride Cured Bio‐Based Epoxy Resin: Effect of Moisture on Thermal and Mechanical Properties

2019 ◽  
Vol 304 (7) ◽  
pp. 1900031 ◽  
Author(s):  
Andrea Anusic ◽  
Katharina Resch‐Fauster ◽  
Arunjunai Raj Mahendran ◽  
Günter Wuzella
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Thermal And Mechanical Properties ◽  
Effect Of Moisture

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

Polymers ◽  
2021 ◽  
Vol 13 (21) ◽  
pp. 3741
Author(s):  
Wei Tan ◽  
Jingxin Na ◽  
Zhaofeng Zhou
Keyword(s):  
Mechanical Properties ◽  
Normal Stress ◽  
Failure Modes ◽  
Failure Load ◽  
Adhesive Joints ◽  
Service Temperature ◽  
Polyurethane Adhesive ◽  
Interface Failure ◽  
Static Tests ◽  
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). 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.

Sign in / Sign up

Export Citation Format

Share Document