Low-velocity impact response of friction riveted joints for aircraft application

Borba, Natascha Zocoller; Körbelin, Johann; Fiedler, Bodo; Santos, Jorge F. dos; Amancio‐Filho, Sergio T.

doi:10.1016/j.matdes.2019.108369

Cited by 24 publications

(10 citation statements)

References 39 publications

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“…Andréa et al [28] explored the impact resistance of AA2024-T3 alloy and carbon fiber reinforced polyphenylene (CFRP) sulfide joints using the low-velocity drop-weight impact tests at impact energies of 2 J to 8 J, and found that 6.5 J is the critical absorbed impact energy of the joints. Borba et al [29,30] explored the impact damage and damage propagation sensitivity of CF-PEEK frictional riveted joints and bolted joints. Zhang et al [31] studied the energy absorption characteristics of CFRP plates with different fiber modulus under different impact angles, and found that the intra-laminar force behavior shows nonlinear relationships between impact angle and fiber modulus.…”

Section: Introductionmentioning

confidence: 99%

Effect of low-velocity impact on mechanical property and fatigue life of DP590/AA6061 self-piercing riveted joints

Zhao

Huang

Jiang

2022

Mater. Res. Express

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The low-velocity impact behaviors of DP590/AA6061 self-piercing riveting (SPR) joints are studied at the impact energies of 5 J, 10 J, 20 J, 30 J, and room temperature (25℃). The lap shear and fatigue tests, and the cross-sectional microscopies of joints are used to assess the mechanical property evolutions of the joints after low-velocity impact. The results show that the absorbed impact energies of SPR joints reach the critical value at an impact energy of 30 J, the exceeded impact energy causes crack failures in the sheets and decreases the interlocking performance of the joints. The static property and the absorbed energy of the SPR joints are reduced by 16% and 36% when the joints are impacted at 30 J, respectively. The low-velocity impacts do not change the failure forms of the joints, but significantly reduce the mechanical interlocking properties of the joints. The fatigue lives of the SPR joints are reduced due to low-velocity impact, and the impacted joints are more sensitive to cyclic loadings.

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Section: Introductionmentioning

confidence: 99%

Effect of low-velocity impact on mechanical property and fatigue life of DP590/AA6061 self-piercing riveted joints

Zhao

Huang

Jiang

2022

Mater. Res. Express

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“…In the process of fabrication, use, and maintenance, CFRP laminate SLJs adhesively bonded structure are inevitably subjected to low-velocity impact (LVI), resulting in various damages, including matrix damage, fiber damage, and delamination damage, known as barely visible impact damage (BVID) [ 5 , 6 , 7 ], which severely affects the integrity, residual strength, and service life of SLJs. Borba et al [ 8 ] investigated the effect of different impact energies on the residual strength of friction riveted joints based on an experimental approach. They discovered that small energy impacts produced BVID, which had less effect on the joint strength, while high energy impacts significantly reduced the residual strength of the joint.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study of Low-Velocity Impact and Tensile after Impact for CFRP Laminates Single-Lap Joints Adhesively Bonded Structure

Huang

2021

Materials

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To investigate the mechanical behavior of the single-lap joints (SLJs) adhesively bonded structure of carbon fiber reinforced polymer (CFRP) laminates under the low-velocity impact (LVI) and tensile-after impact (TAI), tests and simulations were carried out. A finite element model (FEM) was established based on the cohesive zone model (CZM) and Hashin criterion to predict the damage evolution process of adhesive film, intra- and inter-laminar of the SLJs of CFRP laminates, and its effectiveness was verified by experiments. Moreover, three different overlap lengths (20 mm, 30 mm, and 40 mm) and four different impact energies (Intact joint, 10 J, 20 J, and 30 J) are considered in the present study. Finally, the effects of different impact energies and overlap lengths on the residual strength of SLJs after impact were discussed. The results divulged that numerical results of impact and TAI processes of SLJs were in good agreement with experiment results. During the impact process, the damage of the laminates was primarily fiber and matrix tensile damage, whereas the adhesive film was damaged cohesively; the areas of damage increased with the increase of impact energy, and the normal stress of the adhesive film expanded from the edge to the middle region with the increase of impact force. The influence of LVI on SLJs adhesively bonded structures was very significant, and it is not effective to obtain a higher impact resistance by increasing the overlap length. For the tensile process, the failure mode of TAI of the SLJs was interface failure, the surplus strength of the SLJs gradually decreased with the increase of the impact energy because of the smaller overlap length, the overlap length more than 30 mm, and the low energy impact has almost no effect on the residual strength of the SLJs.

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“…In addition to initial strength, the durability of a joint, which is its ability to retain initial strength under harsh environments for long time, is particularly important for metal-composite hybrid structures [9], because engineering structures such as an airplane or car are constantly exposed to the environment. In order to select and use a specific joining method, its long-term behavior must be understood.…”

Section: Introductionmentioning

confidence: 99%

Durability of Metal-Composite Friction Spot Joints under Environmental Conditions

Goushegir¹,

Scharnagl

Santos³

et al. 2020

Materials

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The current paper investigates the durability of the single-lap shear aluminum-composite friction spot joints and their behavior under harsh accelerated aging as well as natural weathering conditions. Four aluminum surface pre-treatments were selected to be performed on the joints based on previous investigations; these were sandblasting (SB), conversion coating (CC), phosphoric acid anodizing (PAA), and PAA with a subsequent application of primer (PAA-P). Most of the pre-treated specimens retained approximately 90% of their initial as-joined strength after accelerated aging experiments. In the case of the PAA pre-treatment, the joint showed a lower retained strength of about 60%. This was explained based on the penetration of humidity into the fine pores of the PAA pre-treated aluminum, reducing the adhesion between the aluminum and composite. Moreover, friction spot joints produced with three selected surface pre-treatments were held under outside natural weathering conditions for one year. PAA-P surface pre-treated specimens demonstrated the best performance with a retained strength of more than 80% after one year. It is believed that tight adhesion and chemical bonding reduced the penetration of humidity at the interface between the joining parts.

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Low-velocity impact response of friction riveted joints for aircraft application

Cited by 24 publications

References 39 publications

Effect of low-velocity impact on mechanical property and fatigue life of DP590/AA6061 self-piercing riveted joints

Effect of low-velocity impact on mechanical property and fatigue life of DP590/AA6061 self-piercing riveted joints

Experimental and Numerical Study of Low-Velocity Impact and Tensile after Impact for CFRP Laminates Single-Lap Joints Adhesively Bonded Structure

Durability of Metal-Composite Friction Spot Joints under Environmental Conditions

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