Evaluation of structural adhesive joints fracture toughness without crack measurement

Alves, Jonnas Santos; Kenedi, Paulo Pedro; Barros, Sílvio de

doi:10.1590/s1517-707620210001.1217

Cited by 2 publications

(4 citation statements)

References 8 publications

(14 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The adhesive with polyurethane base is the masterpur 300. Usually, these types of adhesives are more ductile than an epoxy and can be used for bonding plastics, wood and metals [4]. Handling time is relatively short, thus, the application by a mechanized system is ideal, although its manual use is also possible.…”

Section: Methodsmentioning

confidence: 99%

“…Some advantages of bonded joints applications include the capability in joining dissimilar materials, structures with reduced weight, reduction of stress concentration and fast execution [1,2]. Despite some recent advances in fatigue [3] and fracture [4] modeling of bonded joints adhesives usually present time-dependent stress behavior under static mechanical loading conditions [5], which means that the mechanical properties change over time. For this reason, creep phenomenon must be investigated experimentally aiming to correctly predict the joint behavior until the failure, although there is great difficult due to low productivity of results, since common test machine only work with one specimen per time.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

Neto

Paula²,

Sampaio³

et al. 2021

Matéria (Rio J.)

View full text Add to dashboard Cite

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.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Neto

Paula²,

Sampaio³

et al. 2021

Matéria (Rio J.)

View full text Add to dashboard Cite

show abstract

“…According to the above analysis, the functional relationship of the crack in the region of rapid growth can be constructed as follows 59–62 :…”

Section: Model Establishmentmentioning

confidence: 99%

“…The growth rate function f 3 DK, K c ð Þ at this stage should be able to reflect the relationship between the driving force of the crack DK in the rapidly growing region and the internal resistance K c . When the driving force is 60 According to the above analysis, the functional relationship of the crack in the region of rapid growth can be constructed as follows [59][60][61][62] :…”

Section: Model Establishmentmentioning

confidence: 99%

Fatigue life prediction of composite suspension considering residual stress and crack propagation

Wang

Liu

Huang

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part D:

View full text Add to dashboard Cite

Composite materials are widely used in the automobile industry, compared with traditional mechanical connection, in terms of efficiency and manufacture cost structure, adhesively-bonded joints are usually the material most appropriate connection technology. Adhesively-bonded joints have good performance under fatigue load and the stress concentration is smaller. Lack of reliable design methods, long-term aging behavior, and fatigue life assessment of the adhesive joint, which are limits the bonded joints technology popularization and application. In order to describe the crack propagation process more accurately, an improved generalized crack propagation model was proposed to predict the fatigue life of composite bonded parts. The crack propagation process is divided into three stages, and the influence of machining technology, residual stress, and actual temperature in the process of machining are considered. The model provides an effective theoretical basis for accurately predicting the residual life of composite bonded structures. Experimental and simulation results show that the proposed model expands the prediction range of the existing theoretical model, and the prediction accuracy is significantly improved.

show abstract

Evaluation of structural adhesive joints fracture toughness without crack measurement

Cited by 2 publications

References 8 publications

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

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

Fatigue life prediction of composite suspension considering residual stress and crack propagation

Contact Info

Product

Resources

About