Load distribution in threads of porous metal–ceramic functionally graded composite joints subjected to thermomechanical loading

Zhou, Wenbin; Zhang, Rubing; Ai, Shigang; He, Rujie; Pei, Yongmao; Fang, Daining

doi:10.1016/j.compstruct.2015.08.113

Cited by 51 publications

(33 citation statements)

References 30 publications

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“…Taking into account that an assembly of two or more materials with completely different properties leads to a composite with superior properties surpassing those of each component basic material, we realize why significant amounts are invested in researching these materials. Precisely for this improvement in terms of properties when compared to those of each component, these materials have special applications, for example in the aerospace industry [11][12][13], in the biomedical industry as well as in other engineering applications that require new materials with superior properties.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Aluminum Alloy–Silicon Carbide Functionally Graded Materials Developed by Centrifugal Casting Process

et al. 2021

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The continuous development of modern industries rises the necessity for functionally graded materials. This research starts from the consideration that the incorporation of SiC particles in the molten aluminum alloy can be difficult due to the very low wettability of SiC particles. In order to increase their wettability, SiC particles were covered with a layer of metallic copper. The incorporation of SiC particles into the aluminum alloy mass was performed by centrifugal casting. The secondary hypoeutectic Al-Si alloy used in this study was elaborated within the crucible of a resistors heated furnace. The metallic coating of SiC particles, in addition to the effect of increasing their wettability by molten metal, also has a role in preventing the formation of aluminum carbide in case of heating above 700 °C. A great amount of attention was paid to the parameters used during the centrifugal casting process. The results showed that adjusting the proportion of SiC particles within the composite allows us to obtain values of the thermal expansion coefficient within previously established limits. The present work demonstrates that the coating of SiC particles covered with a thin layer of metallic Cu creates the conditions to easily incorporate them into the molten Al mass, thus obtaining FGMs with controlled properties.

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Section: Introductionmentioning

confidence: 99%

Characterization of Aluminum Alloy–Silicon Carbide Functionally Graded Materials Developed by Centrifugal Casting Process

et al. 2021

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“…Nowadays, the most common methods for joining metals and polymers include screwing, riveting, injection over-molding, and adhesive bonding. However, the use of screws, bolts, and rivets leads to uneven load distributions [7] and high local stress concentrations, which may have an impact on service reliability of those joints [8]. Moreover, these mechanical fasteners require the drilling of through-holes, which cut through the reinforcing fibers of the composite and impair the structural integrity and mechanical properties of the component [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Additive Manufacturing of Titanium with Different Surface Structures for Adhesive Bonding and Thermal Direct Joining with Fiber-Reinforced Polyether-Ether-Ketone (PEEK) for Lightweight Design Applications

Moritz

Götze

Schiefer

et al. 2021

Metals

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Hybrid joints consisting of metals and fiber-reinforced polymer composites exhibit highly desirable properties for many lightweight design applications. This study investigates the potential of additively manufactured surface structures for enhancing the bond strength of such joints in comparison to face milled and laser structured surfaces. Titanium samples with different surface structures (as-built surface, groove-, and pin-shaped structures) were manufactured via electron beam melting and joined to carbon fiber-reinforced polyether-ether-ketone (PEEK) via adhesive bonding and thermal direct joining, respectively. Bond strength was evaluated by tensile shear testing. Samples were exposed to salt spray testing for 1000 h for studying bond stability under harsh environmental conditions. The initial tensile shear strengths of the additively manufactured samples were competitive to or in some cases even exceeded the values achieved with laser surface structuring for both investigated joining methods. The most promising results were found for pin-shaped surface structures. However, the hybrid joints with additively manufactured structures tended to be more susceptible to degradation during salt spray exposure. It is concluded that additively manufactured structures can be a viable alternative to laser surface structuring for both adhesive bonding and thermal direct joining of metal-polymer hybrid joints, thus opening up new potentials in lightweight design.

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“…Mechanical fasteners using bolt-nut connections, however, face problems of loosening clamping force and low fatigue strength due to the spiral shape of the bolt-nut thread, wherein a high stress concentration factor occurs in the first bolt thread [12], and the load distribution in the threads is uneven. Slight pitch differences have to be introduced to increase fatigue strength and prevent loosening [13]. Also, for conventional mechanical joints using pure metal fasteners, there could be a problem of heat shorts on the fuselage structure [14].…”

Section: Introductionmentioning

confidence: 99%

Effect of Lap Length and Stiffness of Peel-Stop Fasteners in Single Lap Joints

Takano

Kitamura

2021

Applied Sciences

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Strength tests on single lap joints with one adhesive (AV138/HV998) and one adhesive layer thickness (0.5 mm), three peel stoppers (brass bolt, nylon bolt and steel pin), and four lap lengths (12.5 mm, 25 mm, 40 mm and 100 mm) were conducted to investigate the effects of varying the lap length and stiffness of the peel-stop fasteners. Joint failure stress decreased, but failure force increased with lap length. Furthermore, joint failure stress was higher with the peel stopper. The effect of the brass-bolt peel stoppers was significant, whereas the effects of the nylon bolts and steel pins were smaller than that of the brass bolts. This indicates that the axial clamp strength and stiffness of the peel stopper are important factors in the shear strength of the lap. In addition, the effect of the stopper was negligible for the 12.5 mm lap. The reason is that the shear strength in the case of the 12.5 mm lap was large and thus the effect of the peel stopper was comparatively small. Moreover, the strength of the 100 mm lap reached the adherent material’s strength.

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Load distribution in threads of porous metal–ceramic functionally graded composite joints subjected to thermomechanical loading

Cited by 51 publications

References 30 publications

Characterization of Aluminum Alloy–Silicon Carbide Functionally Graded Materials Developed by Centrifugal Casting Process

Characterization of Aluminum Alloy–Silicon Carbide Functionally Graded Materials Developed by Centrifugal Casting Process

Additive Manufacturing of Titanium with Different Surface Structures for Adhesive Bonding and Thermal Direct Joining with Fiber-Reinforced Polyether-Ether-Ketone (PEEK) for Lightweight Design Applications

Effect of Lap Length and Stiffness of Peel-Stop Fasteners in Single Lap Joints

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