New b-value parameter for quantitatively monitoring the structural health of carbon fiber-reinforced composites

Jung, Doyun; Yu, Woong‐Ryeol; Ahn, Hyeong Sik; Na, Wonjin

doi:10.1016/j.ymssp.2021.108328

Cited by 18 publications

(6 citation statements)

References 49 publications

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“…In FRP, the b-value, a parameter used to assess material integrity, changes in response to the type of cracks present; it increases when microcracks are dominant and decreases when macrocracks become dominant. The Ib-value (an indicator of crack progression) is observed to consistently decrease from the initiation of a crack to the final failure of the material [34][35][36]. This behavior in FRP is similar to what has been observed in other materials, such as rocks and concrete.…”

Section: Introductionsupporting

confidence: 79%

Enhancing Reliability and Safety in Industrial Applications: Assessing the Applicability of Energy b-Value to Composites

Jung,

Lee

2024

Materials

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This study investigates the fracture behavior of glass fiber-reinforced plastic (GFRP) under various loading conditions using acoustic emission (AE) testing. Using fracture tests and time series analysis of AE signals, parameters such as b-value, improved b-value (Ib-value), and energy b-value (be-value) were examined to understand crack initiation, growth, and structural failure. The stress–strain curve revealed distinct responses during tensile and step loading, and time series analysis highlighted variations in amplitude, AE energy, and Kaiser and Felicity effects. Under tensile loading, the Ib-value exhibited a linear decrease, while step loading introduced complexities, including the Felicity effect. The be-value, incorporating energy considerations, fluctuated, providing insights into micro-cracks and macro-cracks. Statistical analysis demonstrated a consistent decrease in the be-value, emphasizing its potential for long-term monitoring. This study provides a comprehensive technique for assessing composite material fracture behavior, enhancing understanding for critical applications in hydrogen storage vessels and pressure pipes as well as advancing reliability and safety in industrial sectors.

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Section: Introductionsupporting

confidence: 79%

Enhancing Reliability and Safety in Industrial Applications: Assessing the Applicability of Energy b-Value to Composites

Jung,

Lee

2024

Materials

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“…The method has become one of the prevailing tools to develop SHM. Jung et al (2022) In summary, AE signals have been utilized to monitor and locate cracking, delamination, and/or adhesive bond failure at the interfaces in FRPCs. AE has a long history of successful SHM applications mainly for storage tanks and pressure vessels and is also promising for SHM of complex composite materials and structures.…”

Section: Acoustic Emissionmentioning

confidence: 99%

Nondestructive testing and evaluation techniques of defects in fiber-reinforced polymer composites: A review

Chen

Jin²

2022

Front. Mater.

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Fiber-reinforced polymer composites have excellent mechanical properties and outstanding development potential and are cost-effective. They have increasingly been used in numerous advanced and engineering applications as materials for wind turbine blades, helicopter rotors, high-pressure pipelines, and medical equipment. Understanding and assessing structural failure promptly in the whole lifecycle of a composite is essential to mitigating safety concerns and reducing maintenance costs. Various nondestructive testing and evaluation (NDT&E) technologies based on different evaluation principles have been established to inspect defects under different conditions. This paper reviews the established types of NDT&E techniques: acoustic emission, ultrasonic testing, eddy current testing, infrared thermography, terahertz testing, digital image correlation, shearography, and X-ray computed tomography, which is divided into three categories based on the operation frequency and data processing means of the output signal that is directly under analysis. We listed four types of defects/damage that are currently of great interest, namely, voids and porosity, fiber waviness and wrinkling, delamination and debonding, as well as impact damage. To identify a suitable method for different defects/damage, we performed characterization and evaluation by using these NDT&E techniques for typical defects/damage. Then, the cost, inspection speed, benefits and limitations, etc. were compared and discussed. Finally, a brief overview of the development of the technologies and their applications in the field of composite fabrication was discussed.

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“…Nanotechnology can provide a possible solution for structural health monitoring by manufacturing intelligent nanocomposites or so-called self-sensing structures. [27][28][29][30] MXene, an emerging 2D material containing transition metal carbides and/or nitrides, is similar to graphene in structure. 31 However, MXene films are prone to rupture, which are easy to cause sensors failure in the process of packaging and bonding.…”

Section: Introductionmentioning

confidence: 99%

“…Nanotechnology can provide a possible solution for structural health monitoring by manufacturing intelligent nanocomposites or so‐called self‐sensing structures 27–30 . MXene, an emerging 2D material containing transition metal carbides and/or nitrides, is similar to graphene in structure 31 .…”

Section: Introductionmentioning

confidence: 99%

Damage evolution monitoring and failure level evaluation of composite bolted joints by MXene/CNTs sensors

Zhang,

et al. 2023

Polymer Composites

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The composite bolted joints are the weak points of overall structure, lacking an effective and accurate monitoring method. In this paper, a novel MXene/CNTs film sensor with high sensitivity and stability was synthesized for the damage evolution monitoring of composite bolted joints. The correlation between the response signals of the sensors and the mechanical behaviors of the composite structures is established. Based on this research, the damage evolution monitoring and failure level evaluation of composite bolted joints were studied. The damage properties of the composite bolted joints can be reflected in real‐time by the resistance change rates of the sensors. The experimental results show that the failure level of composite bolted joints can be divided into four levels (I‐II‐III‐IV) according to the resistance change rates of sensors. Especially when the damage extended to the III stage, the surged from 0.3 to 0.75. The time point of this step signal occurred about 1 min earlier than the time point of max bearing strength, which can effectively warn the occurrence of structural failure.Highlights Research used high‐sensitivity MXene/CNTs sensor to monitor bolt structure Sensor array can be integrated with the composite bolted structure Structural damage of composite bolted joints was accurately monitored Failure level evaluation of composite bolted structure was achieved

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New b-value parameter for quantitatively monitoring the structural health of carbon fiber-reinforced composites

Cited by 18 publications

References 49 publications

Enhancing Reliability and Safety in Industrial Applications: Assessing the Applicability of Energy b-Value to Composites

Enhancing Reliability and Safety in Industrial Applications: Assessing the Applicability of Energy b-Value to Composites

Nondestructive testing and evaluation techniques of defects in fiber-reinforced polymer composites: A review

Damage evolution monitoring and failure level evaluation of composite bolted joints by MXene/CNTs sensors

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