Adhesively Bonded Aluminum Double-Strap Joints Improved by Nano-silica

Paygozar, Bahman; Sadigh, Mohammad Ali Saeimi

doi:10.1007/s12666-020-01989-7

Cited by 5 publications

(7 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The higher fatigue properties (strength and life) of the SiC‐SAJs were attributed to enhancement of the interfacial interaction between CFs and SiC‐nanoparticles as well as the improved toughness of the nanocomposite's adhesive through absorbed energy during microcracks initiation around the nanoparticles that will be demonstrated later by SEM images. The effectiveness of nanoparticles in arresting crack propagation is another reason for improving the fatigue properties of the adhesive joints as found by Paygozar and Sadigh 22 …”

Section: Resultsmentioning

confidence: 87%

“…The effectiveness of nanoparticles in arresting crack propagation is another reason for improving the fatigue properties of the adhesive joints as found by Paygozar and Sadigh. 22 At RT, it is obvious that reducing the adhesive layer thickness from 0.25 to 0.17 mm improves fatigue limit of the modified joint by SiC-nanoparticles by 55% in return of 30% for the NE-SAJs, as shown in Figure 3. The reasons for improving the fatigue limits of both joint materials are listed in Section 4.1.…”

Section: S-n Relationships At Different Temperatures and Bondline Thi...mentioning

confidence: 92%

“…Experimentally, reducing the adhesive thickness from 7.5 to 0.12 mm increasing the failure stress from 12.1 to 47.1 MPa. The experimental results of some researchers 10,[20][21][22][23] showed that incorporation of 1.5% ± 0.5% wt.% nanoparticles into the adhesive layer of different overlap joints has a significant improvement in their mechanical properties. Hence, in the present study, a 1.5 wt.% SiC-nanoparticles will be used for enhancing the performance of the SAJs.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A new approach for fatigue damage detection in adhesive joints modified with nanoparticles under different temperatures

Khashaba

Najjar

2022

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

Scarf adhesive joints (SAJs) in carbon fiber composites were fabricated with 5° taper angle and bondline thickness of 0.17 mm. The joints are modified with SiC‐nanoparticles and characterized through tensile and fatigue loading at room temperature (RT) and 50°C. The analysis of the hysteresis loop in terms of loss and storage moduli, potential and dissipated energies, and damping factor is a quite new topic and one of the important goals of this study. At RT, the fatigue limit of the SAJs was improved by 55% when the bondline thickness decreased from 0.25 to 0.17 mm and further enhanced by 22% with SiC incorporation. For the first time, the evolution of the potential energy versus fatigue cycles of the SAJs can be modeled for early predicting joint life and hence helps in preventing their sudden failure. At 50°C, the fatigue strength of the SiC‐SAJ is approximately equal to the unmodified joint at RT.

show abstract

Section: Resultsmentioning

confidence: 87%

Section: S-n Relationships At Different Temperatures and Bondline Thi...mentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A new approach for fatigue damage detection in adhesive joints modified with nanoparticles under different temperatures

Khashaba

Najjar

2022

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

show abstract

“…In the present study, the two-parameter Weibull distribution function was used to evaluate the scatter in the fatigue lives of the SAJs with different adhesive materials of 0.17 mm thickness. The Weibull probability density function f(N f i ), probabilities of failure P(N f i ), and probabilities of survival P s (N f i ) are given by equations ( 9)- (11), respectively, as…”

Section: Statistical Analysis Of Fatigue Life Datamentioning

confidence: 99%

“…Improving the fatigue properties (strength and life) of bonded joint via infusion of nanoparticles into the adhesive layer is a recent technique, and one of the objectives of this unique study. Paygozar and Sadigh 11 reported that incorporation of 2 wt% nano-silica into the adhesive layer of the bonded joints enhancing their properties by 21% compared to that fabricated from pure epoxy. Mars ¸avina and Linul 12 found that infusion of 1.0 wt% SiC nanoparticles into polyurethane foam enhanced the compressive and flexural properties by 50%-70%.…”

Section: Introductionmentioning

confidence: 99%

Potential energy as a new approach for detection and monitoring of fatigue damage in scarf adhesive joints modified with nanoparticles

Khashaba

2022

Journal of Composite Materials

View full text Add to dashboard Cite

In this study, fatigue results of the scarf adhesive joints (SAJs) were extensively analyzed regarding the effect of the adhesive materials (neat epoxy (NE), and SiC and Al2O3-nanocomposite), bond thickness (0.17 mm and 0.25 mm) on their dynamic properties, which include loss factor (tan δ), loss modulus ( E''), dissipated energy ( U d), potential energy ( U p), and storage modulus ( E'). Safe fatigue lives of the NE, SiC, and Al2O3-SAJs were estimated at different reliability levels. The experimental measurements revelated that reducing the adhesive layer thickness from 0.25 mm to 0.17 mm result in enhancing the tensile strength and stiffness of the SiC-SAJs by 9.6% and 4.4%, respectively, in return of 9.5% and 5.4% for the Al2O3-SAJ relative to the NE-SAJ. The strength and stiffness of the SiC-SAJs with 0.17 mm bond thickness are higher than those of the Al2O3-SAJ by 15.4% and 3.3%, respectively. The highest improvement of 22.0% in the fatigue strength was occurred for the SiC-SAJ with bond thickness of 0.17 mm in return of 4.8% for the Al2O3-SAJ. The U p was used for the first time (except author works) for monitoring and predicting the damage in the adhesive joints practically the change in the enclosed area of the hysteresis loop is too small to cause a large variation in the tan δ, E'', and U d. Damping factor of the NE-SAJs is marginally increased with the stress levels compared to the aggravated increase of both SiC and Al2O3-SAJs. Zhang model predicts well the potential energy and storage modulus specially at higher stress levels.

show abstract

Failure analysis of scarf adhesive joints modified with SiC-nanoparticles under fatigue loading at room temperature

Khashaba

Najjar

Almitani

2022

Composites Science and Technology

View full text Add to dashboard Cite

Adhesively Bonded Aluminum Double-Strap Joints Improved by Nano-silica

Cited by 5 publications

References 20 publications

A new approach for fatigue damage detection in adhesive joints modified with nanoparticles under different temperatures

A new approach for fatigue damage detection in adhesive joints modified with nanoparticles under different temperatures

Potential energy as a new approach for detection and monitoring of fatigue damage in scarf adhesive joints modified with nanoparticles

Failure analysis of scarf adhesive joints modified with SiC-nanoparticles under fatigue loading at room temperature

Contact Info

Product

Resources

About