Yu Gong
Chongqing University
Composite numberNormalization (statistics)Mode (statistics)Composite laminatesComposite materialBridging (networking)Materials scienceLawScanning electron microscopeDamage toleranceScale (ratio)Mixed modeStress ratioCohesive elementLaminated compositesFatigue loadingUniaxial compressionFailure mechanismDouble cantilever beamStrain energy release rateFracture (geology)FiberCohesive zone modelStructural engineeringDelaminationFlexural modulusFiber pull-outBucklingStress (mechanics)Fracture toughness
31Publications
12H-index
499Citations
Publications 25
Newest
#1Kangkang Wang (Beihang University)H-Index: 4
#2Libin Zhao (Beihang University)H-Index: 21
Last. Yu Gong (Chongqing University)H-Index: 12
view all 5 authors...
Abstract Delamination represents one of the most severe failure modes in composite laminates, especially when they are subjected to uniaxial compression loads. The evaluation of the delamination damage has always been an essential issue of composite laminates for durability and damage tolerance in engineering practice. Focusing on the most typical and representative elliptical delamination issue, an analytical model simultaneously considering the conservative buckling process and non-conservativ...
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#1Linfei Jiang (Chongqing University)
#2Yongxiang Zhang (Chongqing University)
Last. Hao Liu (Chongqing University)H-Index: 1
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Abstract For composite multidirectional laminates widely used in engineering, there is still no effective model to characterize the fatigue delamination behavior with the combined effects of fiber bridging and stress ratio. A new fatigue delamination model was thus proposed in this study to deal with this problem. The model was established based on the fatigue driving force and fatigue delamination resistance, which characterized the effects of stress ratio and fiber bridging, respectively. A se...
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#1Ruixue Ji (Beihang University)
#2Libin Zhao (Beihang University)H-Index: 21
Last. Jianyu Zhang (Chongqing University)H-Index: 25
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Abstract Effects of stiffener debonding defects on postbuckling responses and failure behaviors of composite stiffened panels which have extensive applications in aerospace structures attract significantly increasing attention recently. Aiming to this problem, a series of nonlinear analyses comprehensively accounting for multiple failure modes including intra- and inter-laminar damage in composite laminates, adhesive layer damage between stiffeners and skin, as well as buckling and postbuckling ...
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#1Yu Gong (Chongqing University)H-Index: 12
#2Libin Zhao (Beihang University)H-Index: 21
Last. Chuanzeng Zhang (University of Siegen)H-Index: 38
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Abstract The original data reduction method in the ASTM standard D6671/D6671M-13 is established for unidirectional laminates free of fiber bridging. However, for multidirectional laminates, large-scale fiber bridging occurs in the wake of the crack-tip. Whether the original data reduction method can be applied for multidirectional laminates is questionable. This paper examines the effects of the complex failure mechanism on the flexural modulus of the multidirectional laminates, and how to avoid...
2 CitationsSource
#1Tiancheng Cao (Beihang University)H-Index: 2
#2Libin Zhao (Beihang University)H-Index: 21
Last. Jianyu Zhang (Chongqing University)H-Index: 25
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Abstract Delamination of composite laminates under mode I loading is usually accompanied by large scale fiber bridging. Characterization of the bridging-traction law is of significant importance in delamination simulations to account for the effect of fiber bridging in such situation. This paper proposed a semi-analytical methodology to determine the bridging-traction law of composite laminates under mode I loading. The enhanced beam theory is physically improved by considering the bending-exten...
3 CitationsSource
#1Yu Gong (Chongqing University)H-Index: 12
#2Xinjian Chen (Chongqing University)H-Index: 1
Last. Ning Hu (Chongqing University)H-Index: 60
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Abstract Fiber bridging usually presents in the wake of crack tip in delamination tests of composite double cantilever beam (DCB) specimens. An effective method determining the bridging law is required, which can be applied for developing accurate prediction model. However, extracting the bridging law in the fiber bridging zone is difficult. Here, a simple procedure is proposed for the determination of mode I bridging law. The crack opening displacement (COD) at the initial pre-crack tip is obta...
3 CitationsSource
#1Yu Gong (SAU: Shenyang Aerospace University)H-Index: 12
#2Yixin Hou (Arkansas Electric Cooperative Corporation)H-Index: 1
Last. Ning Hu (Chongqing University)H-Index: 60
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Abstract Fiber bridging has a significant influence on the delamination propagation behavior in multidirectional composite laminates. Traditional pure mode I bilinear cohesive zone models (CZM) do not consider the effect of fiber bridging and result in an inaccurate simulation on the delamination behavior. This study proposed a physical-based three-linear CZM superposed by two bilinear CZMs, which represent two different phenomena including the quasi-brittle matrix fracture characterized by a hi...
11 CitationsSource
#1Wangchang Li (Zhejiang University of Technology)H-Index: 14
#2Liaoyuan Xu (Zhejiang University of Technology)H-Index: 1
Last. Shenglei Che (Zhejiang University of Technology)H-Index: 15
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Abstract In this report, we designed and fabricated carbon-coated honeycomb microwave absorbing materials (HMAMs), which were lightweight with high stiffness and exhibited broadband performance. The effect of structural parameters such as pore size, honeycomb height, coating thickness, permittivity and dielectric dissipation factor of the coating, on the microwave absorption was analyzed in detail. An effective homogeneous model was established through the effective medium theory, which was used...
7 CitationsSource
#1Yu Gong (Chongqing University)H-Index: 12
#2Libin Zhao (Beihang University)H-Index: 21
Last. Ning Hu (Chongqing University)H-Index: 60
view all 4 authors...
Abstract The stress ratio is commonly known to have an effect on the fatigue delamination growth (FDG) behavior of composite laminates. The crack closure phenomenon during delamination growth may change the value of stress ratio. Whether the stress ratio effect on the FDG behavior is resulted by the crack closure or not is investigated in this study and experimental evidences are presented in order to obtain a reliable conclusion. Using the quasi-static unloading approach, the crack closure load...
2 CitationsSource
#1Shihao Yin (Chongqing University)H-Index: 1
#2Yu Gong (SAU: Shenyang Aerospace University)H-Index: 12
Last. Ning Hu (Chongqing University)H-Index: 60
view all 6 authors...
Abstract Large-scale fiber bridging usually presents in the wake of the crack tip in multidirectional composite DCB laminates, resulting in a significant R-curve phenomenon on the fracture toughness. In order to consider the influence of the fiber bridging on the delamination behavior in FE modelling, a novel four-linear cohesive law is proposed in this study, which is physically established based on the realistic failure mechanism during the delamination process. The required parameters in this...
7 CitationsSource