An insight into the low-velocity impact behavior of patch-repaired CFRP laminates using numerical and experimental approaches

Tie, Ying; Hou, Yuliang; Cheng, Li; Xi-hui, Zhou; Sapanathan, Thaneshan; Rachik, Mohamed

doi:10.1016/j.compstruct.2018.01.075

Cited by 71 publications

(61 citation statements)

References 35 publications

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“…Maximum load and displacement increased with the increasing of the impact energy. Tie et al, carried out experimental and numerical studies to investigate the low‐velocity impact behavior of repaired CFRP laminates using patches having different sizes and shapes placed on the single side of the parent composite plates. Continuum damage mechanics‐based numerical model showed a good agreement with the experimental results.…”

Section: Introductionmentioning

confidence: 99%

A study on low‐velocity impact performance of notched GFRP composites repaired by different composite patches: Experiment and modeling

et al. 2019

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Low‐velocity impact performance of notched glass fiber reinforced plastic composites repaired by bonding external composite patches was investigated by experimental and numerical methods. Various patches of different fiber materials such as carbon and glass fiber and thickness were considered under different impact energy levels. The continuum damage mechanics based on a dynamic progressive damage model was using to build the finite element model and cohesive elements were used between the composite patch and notched composite plate. Five different failure criteria based on three‐dimensional Hashin damage models were implemented by the explicit finite element subroutine ABAQUS‐VUMAT with degradation model and used to compare experimental damage areas. The experimental contact force, kinetic energy histories, and experimental damage areas were calculated and compared the numerical ones. While the experimental data confirm the efficiency of the proposed model, they show consistent results with the numerical model. Finally, using the composite patch is succeeded to avoid impact damage. This research provides fundamental support for the appropriate selection of external composite patch type and use of the degradation model with different failure model to achieve high‐efficiency simulation under impact loading.

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Section: Introductionmentioning

confidence: 99%

A study on low‐velocity impact performance of notched GFRP composites repaired by different composite patches: Experiment and modeling

et al. 2019

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“…Multi-impact on composite laminates has been studied to understand progressive damage and damage strength degradation [21,22]. Many authors have studied the effect of multi-impact on external patch repair of the composite under specified conditions [11,22,23,24,25]. A few researchers have investigated the residual compressive strength of the repair-impacted composite [11,14,15,26].…”

Section: Introductionmentioning

confidence: 99%

Residual Tensile Strength of the Multi-Impacted Scarf-Repaired Glass Fiber-Reinforced Polymer (GFRP) Composites

2018

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The effect of multiple/repeated impacts on a repaired composite was investigated using a low-velocity impact test. The composite samples were fabricated through a vacuum resin infusion method (VARI) and repaired by a scarf repair technique. Later, a repeated low-velocity impact test was performed on the original and repaired composites samples. Performance of the multi-impacted repaired and original samples was evaluated and compared by measuring maximum contact force, maximum displacement, maximum time duration, absorbed energy and damage area. Photographs of the post-impacted samples were taken to observe the multi-impact damage progression through visual inspection. The results showed that each repeated impact subjected the samples to more damage. Tensile tests revealed that the scarf repair restored 81.23% strength. It was also observed that the sample obtained the highest damage dent in the low-velocity impact test that failed early during a tensile test and carried the lowest ultimate load.

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“…Table 1 shows the mechanical material properties of the CFRP laminates. Since previous studies [ 7 , 28 ] verified that the optimal patch shape for improving the mechanical properties of a damaged CFRP laminate containing a hole is circular, the damaged laminates in this study were repaired with individual external circular patches. The repaired patches were constructed of the same CFRP prepregs as the laminates, but the stacking sequences were [0/90/0], and the total thickness was 0.45 mm.…”

Section: Experimental Studymentioning

confidence: 99%

“…If low-velocity impact (LVI) damage is not identified and addressed, the consequences will be catastrophic. To satisfy the production requirements and reduce the maintenance costs, especially for large and expensive equipment, composite structures that have sustained small impact damage are usually repaired rather than replaced [ 5 , 6 , 7 ]. Therefore, there is an urgent need to develop patch repair technology to overcome this engineering problem and improve the mechanical properties while minimizing the cost.…”

Section: Introductionmentioning

confidence: 99%

“…In their experimental observations of the combined harmonics at the generated mixing frequency, they confirmed the existence of material nonlinearity in laminates. Although some of the existing studies have mainly focused on the LVI behavior of patch repair laminates [ 6 , 7 , 21 ] or the application of nonlinear Lamb waves for artificial damage detection [ 22 ] in composite materials, this modeling method cannot accurately show the interaction between the impact damage and nonlinear Lamb waves. Few studies have focused on the assessment of BVID in patch-repair CFRP laminates under LVI using a higher harmonic propagation response.…”

Section: Introductionmentioning

confidence: 99%

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Impact Damage Detection in Patch-Repaired CFRP Laminates Using Nonlinear Lamb Waves

Yin

Tie

et al. 2020

Sensors

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Carbon fiber-reinforced polymer (CFRP) laminates, a key composite material, are widely used in aircraft structures and are susceptible to low-velocity impact (LVI) damage from bird strikes, lightning strikes, hail impacts and other situations. Therefore, finding a method that repairs the damaged structure and detects the effect of these repairs under LVI is a very important goal. In this work, the repair effect of LVI damage in CFRP laminates repaired with patches of various sizes is investigated via experimental and numerical nonlinear Lamb wave analyses. An integrated numerical procedure that combines LVI with nonlinear Lamb wave detection is developed to predict the nonlinear Lamb wave behavior in LVI-damaged patch-repaired CFRP laminates. The CFRP laminate damage in the nonlinear Lamb wave simulation is evaluated based on relative acoustic nonlinearity parameters (RANPs). As a result, the integrated numerical procedure is validated with drop-weight impact tests and RAM-5000 SNAP nonlinear ultrasonic detection system. An optimal patch design is established via interpolation to optimize the absorbed energy, delamination surface area, second RANP and third RANP with different patch repair sizes. These parameters exhibit consistent curve fitting trends, indicating that they can be used as important indicators of impact damage. The optimal circular patch design with a radius of 2.5 r has better impact resistance behavior and repair performance.

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An insight into the low-velocity impact behavior of patch-repaired CFRP laminates using numerical and experimental approaches

Cited by 71 publications

References 35 publications

A study on low‐velocity impact performance of notched GFRP composites repaired by different composite patches: Experiment and modeling

A study on low‐velocity impact performance of notched GFRP composites repaired by different composite patches: Experiment and modeling

Residual Tensile Strength of the Multi-Impacted Scarf-Repaired Glass Fiber-Reinforced Polymer (GFRP) Composites

Impact Damage Detection in Patch-Repaired CFRP Laminates Using Nonlinear Lamb Waves

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