Mechanical Behavior of Single Patch Composite Repaired Al Alloy Plates: Experimental and Numerical Analysis

Dai, Jing-Tao; Zhao, Pei-Zhong; Su, Haijun; Wang, Yübo

doi:10.3390/ma13122740

Cited by 9 publications

(11 citation statements)

References 22 publications

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“…Stocchi et al [9] established a very detailed FE model of composite joints with countersunk bolts to accurately determine the stress state and contact between the holes and bolts. Additionally, many studies have employed Hashin-type failure criteria and the constant degradation law to predict the failure loads of composite bolted joins; the numerical results agreed well with the experimental results [10][11][12][13][14]. Hashin-type failure criteria were shown to be computationally efficient in FE models.…”

Section: Introductionsupporting

confidence: 52%

Experimental and Numerical Investigation of Intact, Defective and Repaired Countersunk Composite Joints under Tensile Loading

Huang¹,

Guan

et al. 2022

Materials

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Bolted joints are commonly used for assembling carbon fiber/resin composite structures. Since drilling may generate defects at hole edges which affect mechanical properties, it is of great engineering significance to develop proper repair methods to restore the mechanical properties of the defective parts. However, there are few studies on hole edge defects and their repair methods. Therefore, a novelty short fiber filling repair method was proposed to repair defective holes in this study. The mechanical properties of intact, defective and repaired countersunk composite joints were compared and investigated. Experimental tensile tests showed that defective joints had lower initial stiffness and failure loads compared to intact joints, while the mechanical properties were effectively restored after repair. Three-dimensional finite element models were also established to analyze the damage process of the joints. Results of numerical modelling were consistent with the experimental results. The simulations showed that changes in contact behaviors and local deformations caused by hole edge defects led to the low initial stiffness and stiffness transition point of the joint, while this phenomenon was reduced after repair. Additionally, despite different joint types, laminate failure mainly occurred around the hole and countersink.

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Section: Introductionsupporting

confidence: 52%

Experimental and Numerical Investigation of Intact, Defective and Repaired Countersunk Composite Joints under Tensile Loading

Huang¹,

Guan

et al. 2022

Materials

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“…In their study, the aim was to determine the SIF experimental value in a continuous mode throughout cyclic loads. Dai et al 136 adopted DIC and acoustic emission (AE) methods in order to obtain SIF, crack tip position, crack extension length, and the length of the fracture process zone in the crack extension process. The test was conducted for concrete specimens and three-point bending conditions.…”

Section: Repair/control Methods In Fracture Mechanics Studiesmentioning

confidence: 99%

Review of Piezoelectric Actuator Applications in Damaged Structures: Challenges and Opportunities

et al. 2023

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Piezoelectric material transducers can work as an actuator or sensor. Generally, the actuator will be used to repair the structure, and the sensor will be used to find the health condition. In the last two decades, piezoelectric actuators have shown the capacity to lower and control the shear stress concentration and joint edge peel in adhesively bonded joint systems. Hence, this paper aims at reviewing the application of piezoelectric actuators in damaged structures and adhesively bonded combined systems based on three different repair investigation methods: analytical, numerical, and experimental. Moreover, the study also explores the delamination control of composite material beams and some other studies using a piezoelectric actuator. The specific aim of this work is to determine scientific challenges and future opportunities for considering piezoelectric materials in damaged structure investigations for novice researchers.

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“…Composite patches, unlike traditional methods, do not cause any damage to the parent plate and can be replaced several times [ 1 , 2 , 3 , 4 , 5 , 6 ]. Fiber-reinforced polymer composites are the right choice for being used as a patch since these materials have a high stiffness-to-weight ratio, good fatigue resistance, and excellent corrosion resistance [ 7 , 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

“…The FEM is an excellent technique to analyze the effect of different repair process parameters on the overall performance of structures repaired by polymer composite patches [ 8 , 9 , 14 , 15 , 16 , 17 , 18 , 19 ]. Calculating stress intensity factor (SIF) is a reliable approach to describing crack growth behavior [ 15 , 17 , 19 , 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

“…Results indicated that increasing the patch length leads to decreasing the fatigue life of repaired plates. Dai et al [ 8 ] studied the effects of resin properties and composite patch configurations on the repair process of the damaged aluminum alloy plates. FEM and experimental studies were carried out to examine the failure of the repaired structures under tensile loadings.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fatigue Life Improvement of Cracked Aluminum 6061-T6 Plates Repaired by Composite Patches

et al. 2021

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Bonded patches are widely used in several industry sectors for repairing damaged plates, cracks in metallic structures, and reinforcement of damaged structures. Composite patches have optimal properties such as high strength-to-weight ratio, easiness in being applied, and high flexibility. Due to recent rapid growth in the aerospace industry, analyses of adhesively bonded patches applicable to repairing cracked structures have become of great significance. In the present study, the fatigue behavior of the aluminum alloy, repaired by a double-sided glass/epoxy composite patch, is studied numerically. More specifically, the effect of applying a double-sided composite patch on the fatigue life improvement of a damaged aluminum 6061-T6 is analyzed. 3D finite element numerical modeling is performed to analyze the fatigue performance of both repaired and unrepaired aluminum plates using the Abaqus package. To determine the fatigue life of the aluminum 6061-T6 plate, first, the hysteresis loop is determined, and afterward, the plastic strain amplitude is calculated. Finally, by using the Coffin-Manson equation, fatigue life is predicted and validated against the available experimental data from the literature. Results reveal that composite patches increase the fatigue life of cracked structures significantly, ranging from 55% to 100% for different applied stresses.

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Mechanical Behavior of Single Patch Composite Repaired Al Alloy Plates: Experimental and Numerical Analysis

Cited by 9 publications

References 22 publications

Experimental and Numerical Investigation of Intact, Defective and Repaired Countersunk Composite Joints under Tensile Loading

Experimental and Numerical Investigation of Intact, Defective and Repaired Countersunk Composite Joints under Tensile Loading

Review of Piezoelectric Actuator Applications in Damaged Structures: Challenges and Opportunities

Fatigue Life Improvement of Cracked Aluminum 6061-T6 Plates Repaired by Composite Patches

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