Strain and Damage Assessment of Treated and Untreated Luffa Mat Composite Using Acoustic Emission and Digital Image Correlation

Grabi, Massinissa; Chellil, A.; Habibi, Mohamed; Laperrière, Luc; Grabi, Hocine

doi:10.1080/15440478.2022.2073314

Cited by 3 publications

(3 citation statements)

References 25 publications

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“…Sandwich materials, distinguished by their exceptional attributes such as a high strength-to-weight ratio, excellent heat insulation, strong corrosion resistance, and effective sound absorption, have gained substantial prominence within the automotive, aerospace, and marine industries. [1][2][3][4] The high sensitivity of composite materials to impact is a major concern for researchers and designers in the automotive, marine, and aerospace industries, especially with regard to low-speed impacts. In reality, composite materials can be subject to unintentional impacts from various sources, including aviation, tool drops during repairs, impacts between two panels during assembly, bird strikes during their operational life, 5,6 and stone impacts in vehicles over their lifespan.…”

Section: Introductionmentioning

confidence: 99%

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Experimental and numerical investigation of impact behavior in honeycomb sandwich composites

Djellab,

Chellil,

Lecheb

et al. 2024

Proceedings of the Institution of Mechanical Engineers, Part L:

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This paper presents an experimental and numerical study on the low-energy impact fatigue and bending behavior of sandwich panels reinforced with composite laminate glass and carbon fabric facesheets, supported by a honeycomb core made of Nomex. The crushing behavior of honeycomb sandwich specimens subjected to the impact test was compared and discussed. Our results indicate that the carbon composite facesheets have a significant effect on the impact, resulting in an increase in impact resistance and a 157.14% increase in crack depth in the elastic region compared to glass facesheets reinforcement. This increase serves as an indicator of the laminate's ability to resist damage initiation and impact fracture mechanisms. Also, an increasing in flexural strength about 45.72% was observed in carbon facesheets honeycomb specimens compared to glass facesheets reinforcement. Microscopic illustration of the damaged honeycomb sandwich specimens was conducted to evaluate the interfacial characteristics and describe the damage mechanics of the composite facesheets and core adhesion under the impact test. The numerical approach proves to be efficient in terms of accuracy and simplicity compared to existing methods for predicting the damage mechanisms of honeycomb sandwich structures. It was noted that results of numerical study show best agreements with experiment results and the model can be used to predict the low-energy impact fatigue.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental and numerical investigation of impact behavior in honeycomb sandwich composites

Djellab,

Chellil,

Lecheb

et al. 2024

Proceedings of the Institution of Mechanical Engineers, Part L:

View full text Add to dashboard Cite

show abstract

“…Acoustic emission (AE) was used to record the microcracks during the impact of granite specimens [31][32][33]. Different materials can be studied using acoustic emission and digital image correlation techniques to investigate the specific characteristics of the material damage process under different loading effects in order to follow the evolution of the material under different damage modes and to determine the strain [34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Mechanical Properties and Acoustic Emission Characteristics of Deep Soft Rocks under Low-Frequency Dynamic Disturbance

Dong,

Wang,

Sun

et al. 2023

Applied Sciences

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The strong dynamic disturbance in deep mines seriously affects the safe and efficient mining of deep resources. In this study, we used the creep disturbance impact loading system and acoustic emission system to conduct experiments on soft siltstone specimens under a combination of dynamic and static loads. Based on the failure characteristics and waveform signals, the mechanical properties and acoustic emission characteristics of soft rocks under different dynamic disturbances were quantitatively revealed. The experimental results show that: (1) Under the dynamic disturbance, the deformation of the siltstone specimens increases as the initial average stress increases. When the axial stress exceeds the upper stress threshold, cracks continue to propagate, resulting in the destabilization of the specimen. (2) The magnitude of the initial average stress is closely related to the degree of damage and failure mode of the siltstone. With the increase in the initial average stress, the failure mode of the siltstone specimens gradually changes. As the initial average stress increases, the maximum load first decreases, then increases, and finally decreases, and the fitted curve is polynomial. We used the RFPA2D cyclic loading module to analyze the effect of the elastic modulus of each loading step on the damage evolution of the specimen under dynamic disturbance. The waveform characteristics during the evolution of the damage of the specimens were analyzed by extracting signals at the key points.

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Impact Behavior Analysis of Luffa/Epoxy Composites Under Low-Velocity Loading

Grabi,

Chellil,

Lecheb

et al. 2024

Appl Compos Mater

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Strain and Damage Assessment of Treated and Untreated Luffa Mat Composite Using Acoustic Emission and Digital Image Correlation

Cited by 3 publications

References 25 publications

Experimental and numerical investigation of impact behavior in honeycomb sandwich composites

Experimental and numerical investigation of impact behavior in honeycomb sandwich composites

Experimental Study on the Mechanical Properties and Acoustic Emission Characteristics of Deep Soft Rocks under Low-Frequency Dynamic Disturbance

Impact Behavior Analysis of Luffa/Epoxy Composites Under Low-Velocity Loading

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