Macroscopic response of carbon-fiber pyramidal truss core panel taking account of local defect

Lei, Hongshuai; Zhu, Xiaolei; Chen, Haosen; Fan, Hualin; Chen, Mingji; Fang, Daining

doi:10.1016/j.compositesb.2015.04.052

Cited by 37 publications

(6 citation statements)

References 37 publications

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“…During the manufacture of honeycomb plates, defects are inevitable and there are many studies on defect models [8,22,23], including honeycomb shape defects, missing struts for the unit cell, debonding between panels and core, etc. Based on the specimen characteristics, the defect analyses are focused on the uneven height of the panels and the debonding between core and panels shown in Figure 9.…”

Section: Defects Analysismentioning

confidence: 99%

Experimental and Simulation Studies on the Compressive Properties of Brazed Aluminum Honeycomb Plates and a Strength Prediction Method

Jiang

Xiao

Zhang

et al. 2020

Metals

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To study the compressive mechanical properties of a new type of brazed aluminum honeycomb plate (BAHP), tensile tests on single- and brazed-cell walls as well as compression tests in the out-of-plane, in-plane longitudinal, and transverse directions were conducted. Compared to the material properties of a traditional glued aluminum honeycomb plate (GAHP), those of the single- and brazed-cell walls of the BAHP are entirely different. Therefore, their characteristics should be considered separately when performing theoretical and simulation analysis. Under out-of-plane compression, the core of the BAHP did not debond, owing to its higher strength than that of the GAHP. In comparison, under in-plane compression in the longitudinal and transverse directions, the load–displacement characteristics, ultimate load, and failure modes also differed, and there was no large-scale cracking. Considering the characteristics of the BAHP, a strength prediction method was proposed. The simulation results demonstrated that the model built based on the new method was highly consistent with the experimental results. Defects with uneven height and debonding will cause the overall instability, and the degree of defects will influence the strength and instability displacement, which have little impact on the elastic stage. Moreover, the model considering defects is closer to the test results.

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Section: Defects Analysismentioning

confidence: 99%

Experimental and Simulation Studies on the Compressive Properties of Brazed Aluminum Honeycomb Plates and a Strength Prediction Method

Jiang

Xiao

Zhang

et al. 2020

Metals

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“…The bonding area between the core and face sheets was increased, but not all fibers in the truss were aligned in the strut direction, reducing the efficiency of the reinforced fibers. Chen et al [34] and Lei et al [35] investigated the effect of defects on the mechanical performance of carbon fiber composite lattice structures and found that the struts were the main components carrying external loads.…”

Section: Introductionmentioning

confidence: 99%

A novel strengthening method for carbon fiber composite lattice truss structures

et al. 2016

Composite Structures

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“…Sandwich structures are beingused increasingly in aerospace, aircraft, automobile, and construction industries [1][2][3][4][5][6][7][8] for their excellent strength, stiffness, and stability. It has long been known that the stiffness-to-weight and strength-to-weight ratiosof a composite structure can be increased significantly by sandwiching a core material between the two stiffening skins [9].…”

Section: Introductionmentioning

confidence: 99%

Investigation on the free vibration behavior of sandwich conical shells with reinforced cores

Zarei

Rahimi

Shahgholian‐Ghahfarokhi

2021

Jnl of Sandwich Structures & Materials

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The free vibration behavior of sandwich conical shells with reinforced cores is investigated in the present study using experimental, analytical, and numerical methods. A new effective smeared method is employed to superimpose the stiffness contribution of skins with those of the stiffener in order to achieve equivalent stiffness of the whole structure. The stiffeners are also considered as a beam to support shear forces and bending moments in addition to the axial forces. Using Donnell’s shell theory and Galerkin method, the natural frequencies of the sandwich shell are subsequently derived. To validate analytical results, experimental modal analysis (EMA) is further conducted on the conical sandwich shell. For this purpose, a method is designed for manufacturing specimens through the filament winding process. For more validation, a finite element model (FEM) is built. The results revealed that all the validations were in good agreement with each other. Based on these analyses, the influence of the cross-sectional area of the stiffeners, the semi-vertex angle of the cone, stiffener orientation angle, and the number of stiffeners are investigated as well. The results achieved are novel and can be thus employed as a benchmark for further studies.

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Macroscopic response of carbon-fiber pyramidal truss core panel taking account of local defect

Cited by 37 publications

References 37 publications

Experimental and Simulation Studies on the Compressive Properties of Brazed Aluminum Honeycomb Plates and a Strength Prediction Method

Experimental and Simulation Studies on the Compressive Properties of Brazed Aluminum Honeycomb Plates and a Strength Prediction Method

A novel strengthening method for carbon fiber composite lattice truss structures

Investigation on the free vibration behavior of sandwich conical shells with reinforced cores

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