Acoustic emission response and micro-deformation behavior for compressive buckling failure of multi-delaminated composites

Zhou, Wei; Lv, Zhi-hui; Li, Zhiyuan; Xiang, Song

doi:10.1177/0309324716645244

Cited by 19 publications

(7 citation statements)

References 37 publications

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“…AE is also a powerful SHM solution that has been extensively used in the literature [15]. Zhou et al [16] used acoustic emissions with digital image correlation (DIC) to monitor the compressive behavior of multi-delaminated composites. More specifically, they correlated the amplitude, duration, and relative energy with damage propagation.…”

Section: Acoustic Emissionmentioning

confidence: 99%

Health Monitoring of Aerospace Structures Utilizing Novel Health Indicators Extracted from Complex Strain and Acoustic Emission Data

Galanopoulos

Milanoski

Broer

et al. 2021

Sensors

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The development of health indicators (HI) of diagnostic and prognostic potential from generally uninformative raw sensor data is both a challenge and an essential feature for data-driven diagnostics and prognostics of composite structures. In this study, new damage-sensitive features, developed from strains acquired with Fiber Bragg Grating (FBG) and acoustic emission (AE) data, were investigated for their suitability as HIs. Two original fatigue test campaigns (constant and variable amplitude) were conducted on single-stringer composite panels using appropriate sensors. After an initial damage introduction in the form of either impact damage or artificial disbond, the panels were subjected to constant and variable amplitude compression–compression fatigue tests. Strain sensing using FBGs and AE was employed to monitor the damage growth, which was further verified by phased array ultrasound. Several FBGs were incorporated in special SMARTapesTM, which were bonded along the stiffener’s feet to measure the strain field, whereas the AE sensors were strategically placed on the panels’ skin to record the acoustic emission activity. HIs were developed from FBG and AE raw data with promising behaviors for health monitoring of composite structures during service. A correlation with actual damage was attempted by leveraging the measurements from a phased array camera at several time instances throughout the experiments. The developed HIs displayed highly monotonic behaviors while damage accumulated on the composite panel, with moderate prognosability.

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Section: Acoustic Emissionmentioning

confidence: 99%

Health Monitoring of Aerospace Structures Utilizing Novel Health Indicators Extracted from Complex Strain and Acoustic Emission Data

Galanopoulos

Milanoski

Broer

et al. 2021

Sensors

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show abstract

“…The AE signal is a kind of mutant ultrahigh‐frequency (UHF) stress wave pulse signal, which can be used to characterize the internal damageand defect of material when it is deformed, 21 which is then. Next, the failure mechanism is analyzed by cluster processing or wavelet analysis, followed by conducting failure analysis including damage pattern recognition, fault source location, and fault location prediction 22‐25 . Eventually, the failure and damage characteristic frequencies of samples are established.…”

Section: Introductionmentioning

confidence: 99%

Low‐velocity impact resistance and acoustic emission evaluation on mechanical failure of carbon fiber weft‐knitting‐reinforced composites

Tian

Qin

Shi

et al. 2021

Polymers for Advanced Techs

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In this study, the carbon fiber weft‐knitting (CFWK)‐reinforced composites were prepared and the deformation mechanism during acoustic emission (AE) and low‐velocity impact resistance. To fabricate CFWK composites, single‐sided 1 × 1 variable plain stitch, double‐sided interlock structure, and two inter‐ply and intra‐ply hybrid structures of the former two stitches were applied for reinforcements in epoxy films via hot‐pressing. Moreover, we evaluated the tensile and bending properties during AE and investigated the low‐velocity impact properties of CFWK‐reinforced composites to evaluate the failure mechanism of composites. Finally, we analyzed the effects of laminating numbers, ply angle, and fabric structure on the properties of CFWK‐reinforced composites. Results showed that the composites with 1 × 1 variable plain stitch reinforcement exhibited the highest tensile strength and bending strength (206.22 and 213.43 MPa, respectively) among the composites with a two‐layer structure. The tensile fracture strength of [0/90] laying was 35%–50% lower than that of [0/0] laying. In addition, the cluster analysis on AE signal frequency showed that fiber debonding was the main failure mode, accounting for 68% of the total debonding when stretching along the longitudinal direction of the two‐ply composite loop. Under the impact energy of 4 J, the maximum load of CFWK‐reinforced composites with three‐ply interlock increased by 275% compared to that of single‐ply composites. Furthermore, the three‐ply interlock CFWK‐reinforced composites were perforated under impact energy of 10 J.

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“…In order to study the failure behavior of delamination, some scholars have done many researches. Zhou et al [10] carried out three kinds of specimens to study the effects of delamination positions and lengths on compressive behavior of the composite. The results indicate that multi-delamination defects lead to the reduction of mechanical properties, and the lengths and positions of delaminations and the thickness of sub-layer have significant influence on buckling behaviors.…”

Section: Introductionmentioning

confidence: 99%

Comparison on mechanical properties, damage evolution and aging effects of multi-delaminated composites under three point bending

et al. 2020

Self Cite

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The study on natural aging of fiber reinforced composite, delamination damage behavior and damage pattern recognition plays a significant role in structural health monitoring of the material. In this study, acoustic emission is used to investigate damage evolution process and damage mechanisms in unidirectional glass and carbon-glass orthogonal woven fiber reinforced composites containing symmetric multiple delaminations under three point bending testing. Based on the principle of control variables, four kinds of specimens are manufactured to investigate the comparative study for the effects of delaminations, reinforced materials and fiber orientation on buckling failure behaviors and the effects of aging on mechanical properties. The results indicate that the degradation of strength and stiffness of composite can be influenced by the existence of delamination defects and natural aging condition. Both negative and positive effects can be generated by natural aging condition. Moreover, reinforced materials, porosity and fiber orientation are important factors influencing the reliability of composite. Clustering results of unidirectional fiber reinforced composites indicate interphase failure is the main damage component, moreover, the existence of symmetrical multiple delaminations will aggravate the damage of composite and make instability failure characterized by intermittency.

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Acoustic emission response and micro-deformation behavior for compressive buckling failure of multi-delaminated composites

Cited by 19 publications

References 37 publications

Health Monitoring of Aerospace Structures Utilizing Novel Health Indicators Extracted from Complex Strain and Acoustic Emission Data

Health Monitoring of Aerospace Structures Utilizing Novel Health Indicators Extracted from Complex Strain and Acoustic Emission Data

Low‐velocity impact resistance and acoustic emission evaluation on mechanical failure of carbon fiber weft‐knitting‐reinforced composites

Comparison on mechanical properties, damage evolution and aging effects of multi-delaminated composites under three point bending

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