Study of the Life Span of Adhesively Bonded Single Lap Joint Due to Creep

Materia

article

Ranulfo Martins Carneiro Neto¹  Mila Siqueira de Paula²  Eduardo Martins Sampaio²  Ney Robson Ferreira Rohem³  Lucas Lisbôa Vignoli¹ 

[1] Center of Technology and Application of Composite Materials;University of State of Rio de Janeiro;Federal Fluminense Institute

关键词: Creep;    single lap joints;    life span;    bonded joint;   

DOI  :  10.1590/S1517-707620210004.1321

学科分类：工程和技术（综合）

来源: Universidade Federal do Rio de Janeiro * Coordenacao dos Programas de Pos-Graduacao de Engenharia

【 摘 要 】

Adhesive joints are often used in several areas, including offshore systems and automobiles. The development of suitable models to predict the joint behavior has several challenges, especially due to creep phenomena. The aim of this study is to investigate the creep lifetime of single lap joints considering two different adhesives (epoxy and polyurethane). Long-term tests are performed using a pneumatic creep equipment (PCE). The parameters to the creep model are obtained for each adhesive, where load and life span are related. The models obtained and the times of joints life span are compared with two other adhesives previously studied. The results confirm that the knowledge of the lap shear strength value is just a reference to the designer, however experimental tests in creep for each different adhesive is necessary. The comparison between the joints bonded with two different epoxies shows similar results, what was demonstrated by the similar curves obtained by the models. The comparison between polyurethane adhesives did not show similar behavior in the curves obtained from the models, especially in the time of life span.

【 授权许可】

CC BY